src/json.c

Fri, 20 Dec 2024 15:00:05 +0100

author
Mike Becker <universe@uap-core.de>
date
Fri, 20 Dec 2024 15:00:05 +0100
changeset 1030
06091e067bee
parent 1020
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child 1033
e3009345984b
permissions
-rw-r--r--

add cxBufferAppend() - fixes #534

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2024 Mike Becker, Olaf Wintermann All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <string.h>
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30 #include <ctype.h>
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31 #include <assert.h>
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32 #include <stdio.h>
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33 #include <errno.h>
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34
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35 #include "cx/json.h"
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36
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37 /*
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38 * RFC 8259
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39 * https://tools.ietf.org/html/rfc8259
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40 */
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41
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42 static CxJsonValue cx_json_value_nothing = {.type = CX_JSON_NOTHING};
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43
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44 static void token_destroy(CxJsonToken *token) {
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45 if (token->allocated) {
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46 cx_strfree(&token->content);
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47 }
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48 }
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49
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50 static int num_isexp(const char *content, size_t length, size_t pos) {
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51 if (pos >= length) {
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52 return 0;
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53 }
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54
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55 int ok = 0;
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56 for (size_t i = pos; i < length; i++) {
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57 char c = content[i];
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58 if (isdigit(c)) {
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59 ok = 1;
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60 } else if (i == pos) {
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61 if (!(c == '+' || c == '-')) {
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62 return 0;
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63 }
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64 } else {
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65 return 0;
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66 }
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67 }
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68
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69 return ok;
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70 }
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71
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72 static CxJsonTokenType token_numbertype(const char *content, size_t length) {
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73 if (length == 0) return CX_JSON_TOKEN_ERROR;
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74
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75 if (content[0] != '-' && !isdigit(content[0])) {
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76 return CX_JSON_TOKEN_ERROR;
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77 }
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78
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79 CxJsonTokenType type = CX_JSON_TOKEN_INTEGER;
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80 for (size_t i = 1; i < length; i++) {
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81 if (content[i] == '.') {
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82 if (type == CX_JSON_TOKEN_NUMBER) {
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83 return CX_JSON_TOKEN_ERROR; // more than one decimal separator
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84 }
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85 type = CX_JSON_TOKEN_NUMBER;
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86 } else if (content[i] == 'e' || content[i] == 'E') {
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87 return num_isexp(content, length, i + 1) ? CX_JSON_TOKEN_NUMBER : CX_JSON_TOKEN_ERROR;
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88 } else if (!isdigit(content[i])) {
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89 return CX_JSON_TOKEN_ERROR; // char is not a digit, decimal separator or exponent sep
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90 }
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91 }
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92
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93 return type;
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94 }
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95
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96 static CxJsonToken token_create(CxJson *json, bool isstring, size_t start, size_t end) {
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97 cxmutstr str = cx_mutstrn(json->buffer.space + start, end - start);
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98 bool allocated = false;
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99 if (json->uncompleted.tokentype != CX_JSON_NO_TOKEN) {
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100 allocated = true;
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101 str = cx_strcat_m(json->uncompleted.content, 1, str);
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102 if (str.ptr == NULL) {
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103 return (CxJsonToken){CX_JSON_NO_TOKEN, false, {NULL, 0}};
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104 }
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105 }
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106 json->uncompleted = (CxJsonToken){0};
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107 CxJsonTokenType ttype;
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108 if (isstring) {
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109 ttype = CX_JSON_TOKEN_STRING;
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110 } else {
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111 cxstring s = cx_strcast(str);
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112 if (!cx_strcmp(s, CX_STR("true")) || !cx_strcmp(s, CX_STR("false"))
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113 || !cx_strcmp(s, CX_STR("null"))) {
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114 ttype = CX_JSON_TOKEN_LITERAL;
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115 } else {
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116 ttype = token_numbertype(str.ptr, str.length);
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117 }
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118 }
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119 if (ttype == CX_JSON_TOKEN_ERROR) {
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120 if (allocated) {
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121 cx_strfree(&str);
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122 }
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123 return (CxJsonToken){CX_JSON_TOKEN_ERROR, false, {NULL, 0}};
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124 }
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125 return (CxJsonToken){ttype, allocated, str};
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126 }
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127
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128 static CxJsonTokenType char2ttype(char c) {
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129 switch (c) {
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130 case '[': {
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131 return CX_JSON_TOKEN_BEGIN_ARRAY;
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132 }
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133 case '{': {
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134 return CX_JSON_TOKEN_BEGIN_OBJECT;
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135 }
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136 case ']': {
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137 return CX_JSON_TOKEN_END_ARRAY;
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138 }
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139 case '}': {
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140 return CX_JSON_TOKEN_END_OBJECT;
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141 }
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142 case ':': {
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143 return CX_JSON_TOKEN_NAME_SEPARATOR;
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144 }
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145 case ',': {
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146 return CX_JSON_TOKEN_VALUE_SEPARATOR;
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147 }
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148 case '"': {
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149 return CX_JSON_TOKEN_STRING;
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150 }
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151 default: {
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152 if (isspace(c)) {
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153 return CX_JSON_TOKEN_SPACE;
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154 }
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155 }
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156 }
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157 return CX_JSON_NO_TOKEN;
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158 }
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159
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160 static enum cx_json_status token_parse_next(CxJson *json, CxJsonToken *result) {
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161 // check if there is data in the buffer
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162 if (cxBufferEof(&json->buffer)) {
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163 return json->uncompleted.tokentype == CX_JSON_NO_TOKEN ?
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164 CX_JSON_NO_DATA : CX_JSON_INCOMPLETE_DATA;
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165 }
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166
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167 // current token type and start index
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168 CxJsonTokenType ttype = json->uncompleted.tokentype;
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169 size_t token_start = json->buffer.pos;
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170
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171 for (size_t i = json->buffer.pos; i < json->buffer.size; i++) {
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172 char c = json->buffer.space[i];
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173 if (ttype != CX_JSON_TOKEN_STRING) {
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174 // currently non-string token
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175 CxJsonTokenType ctype = char2ttype(c); // start of new token?
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176 if (ttype == CX_JSON_NO_TOKEN) {
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177 if (ctype == CX_JSON_TOKEN_SPACE) {
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178 json->buffer.pos++;
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179 continue;
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180 } else if (ctype == CX_JSON_TOKEN_STRING) {
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181 // begin string
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182 ttype = CX_JSON_TOKEN_STRING;
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183 token_start = i;
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184 } else if (ctype != CX_JSON_NO_TOKEN) {
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185 // single-char token
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186 json->buffer.pos = i + 1;
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187 *result = (CxJsonToken){ctype, false, {NULL, 0}};
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188 return CX_JSON_NO_ERROR;
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189 } else {
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190 ttype = CX_JSON_TOKEN_LITERAL; // number or literal
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191 token_start = i;
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192 }
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193 } else {
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194 // finish token
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195 if (ctype != CX_JSON_NO_TOKEN) {
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196 *result = token_create(json, false, token_start, i);
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197 if (result->tokentype == CX_JSON_NO_TOKEN) {
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198 return CX_JSON_BUFFER_ALLOC_FAILED;
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199 }
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200 if (result->tokentype == CX_JSON_TOKEN_ERROR) {
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201 return CX_JSON_FORMAT_ERROR_NUMBER;
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202 }
1007
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203 json->buffer.pos = i;
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204 return CX_JSON_NO_ERROR;
937
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205 }
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206 }
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207 } else {
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208 // currently inside a string
1000
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209 if (json->tokenizer_escape) {
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210 json->tokenizer_escape = false;
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211 } else {
937
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212 if (c == '"') {
1002
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213 *result = token_create(json, true, token_start, i + 1);
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214 if (result->tokentype == CX_JSON_NO_TOKEN) {
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215 return CX_JSON_BUFFER_ALLOC_FAILED;
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216 }
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217 json->buffer.pos = i + 1;
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218 return CX_JSON_NO_ERROR;
937
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219 } else if (c == '\\') {
1000
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220 json->tokenizer_escape = true;
937
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221 }
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222 }
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223 }
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224 }
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diff changeset
225
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226 if (ttype != CX_JSON_NO_TOKEN) {
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227 // uncompleted token
1008
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228 size_t uncompleted_len = json->buffer.size - token_start;
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229 if (json->uncompleted.tokentype == CX_JSON_NO_TOKEN) {
937
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230 // current token is uncompleted
1002
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231 // save current token content
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232 CxJsonToken uncompleted = {
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233 ttype, true,
1008
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234 cx_strdup(cx_strn(json->buffer.space + token_start, uncompleted_len))
1002
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diff changeset
235 };
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diff changeset
236 if (uncompleted.content.ptr == NULL) {
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diff changeset
237 return CX_JSON_BUFFER_ALLOC_FAILED;
937
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238 }
1002
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diff changeset
239 json->uncompleted = uncompleted;
937
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240 } else {
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241 // previously we also had an uncompleted token
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242 // combine the uncompleted token with the current token
1002
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diff changeset
243 assert(json->uncompleted.allocated);
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diff changeset
244 cxmutstr str = cx_strcat_m(json->uncompleted.content, 1,
1008
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245 cx_strn(json->buffer.space + token_start, uncompleted_len));
1002
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diff changeset
246 if (str.ptr == NULL) {
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247 return CX_JSON_BUFFER_ALLOC_FAILED;
937
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248 }
1002
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diff changeset
249 json->uncompleted.content = str;
937
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250 }
1008
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251 // advance the buffer position - we saved the stuff in the uncompleted token
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252 json->buffer.pos += uncompleted_len;
937
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253 }
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254
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255 return CX_JSON_INCOMPLETE_DATA;
937
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256 }
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257
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258 static cxmutstr unescape_string(const CxAllocator *a, cxmutstr str) {
937
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259 // TODO: support more escape sequences
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260 // we know that the unescaped string will be shorter by at least 2 chars
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261 cxmutstr result;
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262 result.length = 0;
1002
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diff changeset
263 result.ptr = cxMalloc(a, str.length - 1);
937
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264 if (result.ptr == NULL) {
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265 return result;
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266 }
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267
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268 bool u = false;
1002
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269 for (size_t i = 1; i < str.length - 1; i++) {
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270 char c = str.ptr[i];
937
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271 if (u) {
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272 u = false;
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273 if (c == 'n') {
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274 c = '\n';
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275 } else if (c == 't') {
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276 c = '\t';
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277 }
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278 result.ptr[result.length++] = c;
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279 } else {
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280 if (c == '\\') {
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281 u = true;
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282 } else {
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283 result.ptr[result.length++] = c;
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284 }
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285 }
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286 }
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287 result.ptr[result.length] = 0;
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288
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289 return result;
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290 }
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291
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292 static int parse_number(cxmutstr str, void *value, bool asint) {
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293 char *endptr = NULL;
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294 if (str.length > 30) {
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295 return 1;
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296 }
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297 // the buffer guarantees that we are working on a copied string
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298 char c = str.ptr[str.length];
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299 str.ptr[str.length] = 0;
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300
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301 if (asint) {
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302 errno = 0;
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303 long long v = strtoll(str.ptr, &endptr, 10);
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304 if (errno == ERANGE) {
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305 return 1;
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306 }
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307 *((int64_t*)value) = (int64_t) v;
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308 } else {
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309 // TODO: proper JSON spec number parser
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310 // TODO: also return an error when loss of precision is high
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311 double v = strtod(str.ptr, &endptr);
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312 *((double*)value) = v;
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313 }
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314
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315 // recover from the hack
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316 str.ptr[str.length] = c;
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317
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318 return endptr != &str.ptr[str.length];
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319 }
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320
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321 static CxJsonValue* create_json_value(CxJson *json, CxJsonValueType type) {
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322 CxJsonValue *v = cxMalloc(json->allocator, sizeof(CxJsonValue));
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323 if (v == NULL) {
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324 return NULL;
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325 }
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326
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327 // initialize the value
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328 if (type == CX_JSON_ARRAY) {
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329 cx_array_initialize_a(json->allocator, v->value.array.array, 16);
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330 if (v->value.array.array == NULL) {
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331 cxFree(json->allocator, v);
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332 return NULL;
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333 }
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334 } else if (type == CX_JSON_OBJECT) {
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335 cx_array_initialize_a(json->allocator, v->value.object.values, 16);
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336 if (v->value.object.values == NULL) {
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337 cxFree(json->allocator, v);
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338 return NULL;
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339 }
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340 } else {
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341 memset(v, 0, sizeof(CxJsonValue));
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342 }
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343 v->type = type;
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344 v->allocator = json->allocator;
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345
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346 // add the new value to a possible parent
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347 CxArrayReallocator value_realloc = cx_array_reallocator(json->allocator, NULL);
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348 if (json->vbuf_size > 0) {
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349 CxJsonValue *parent = json->vbuf[json->vbuf_size - 1];
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350 if (parent->type == CX_JSON_ARRAY) {
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351 cx_array_simple_add_a(&value_realloc, parent->value.array.array, v);
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352 } else if (parent->type == CX_JSON_OBJECT) {
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353 assert(parent->value.object.values_size > 0);
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354 assert(parent->value.object.values[parent->value.object.values_size - 1].value == NULL);
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355 parent->value.object.values[parent->value.object.values_size - 1].value = v;
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356 } else {
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357 assert(false);
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358 }
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359 }
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360
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361 // add the new value to the stack, if it is an array or object
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diff changeset
362 if (type == CX_JSON_ARRAY || type == CX_JSON_OBJECT) {
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363 CxArrayReallocator vbuf_realloc = cx_array_reallocator(NULL, json->vbuf_internal);
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364 if (cx_array_simple_add_a(&vbuf_realloc, json->vbuf, v)) {
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365 cxFree(json->allocator, v);
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366 return NULL;
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367 }
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bbf41b9c2658 fix memory leak in json reader when handling incomplete tokens
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368 }
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369
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370 // if currently no value is parsed, this is now the value of interest
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371 if (json->parsed == NULL) {
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372 json->parsed = v;
937
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373 }
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374
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375 return v;
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376 }
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377
1009
7650e722437e minor cleanup
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378 static int json_obj_add_entry(const CxJson *json, char *name) {
1000
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diff changeset
379 CxJsonObjValue kv = {name, NULL};
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380 assert(json->vbuf_size > 0);
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381 CxJsonValue *parent = json->vbuf[json->vbuf_size - 1];
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diff changeset
382 assert(parent != NULL);
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383 assert(parent->type == CX_JSON_OBJECT);
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384 CxArrayReallocator value_realloc = cx_array_reallocator(json->allocator, NULL);
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385 return cx_array_simple_add_a(&value_realloc, parent->value.object.values, kv);
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386 }
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387
1000
1aecddf7e209 simplify how the json parser works
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388 #define JP_STATE_VALUE_BEGIN 0
1aecddf7e209 simplify how the json parser works
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389 #define JP_STATE_VALUE_END 10
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diff changeset
390 #define JP_STATE_VALUE_BEGIN_OBJ 1
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diff changeset
391 #define JP_STATE_OBJ_SEP_OR_CLOSE 11
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diff changeset
392 #define JP_STATE_VALUE_BEGIN_AR 2
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diff changeset
393 #define JP_STATE_ARRAY_SEP_OR_CLOSE 12
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diff changeset
394 #define JP_STATE_OBJ_NAME_OR_CLOSE 5
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diff changeset
395 #define JP_STATE_OBJ_NAME 6
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diff changeset
396 #define JP_STATE_OBJ_COLON 7
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397
1000
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diff changeset
398 void cxJsonInit(CxJson *json, const CxAllocator *allocator) {
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
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diff changeset
399 if (allocator == NULL) {
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
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diff changeset
400 allocator = cxDefaultAllocator;
333155f234c4 add support for allocators to the json parser
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parents: 976
diff changeset
401 }
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
402
937
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parents:
diff changeset
403 memset(json, 0, sizeof(CxJson));
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
404 json->allocator = allocator;
1000
1aecddf7e209 simplify how the json parser works
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parents: 996
diff changeset
405
946
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Mike Becker <universe@uap-core.de>
parents: 944
diff changeset
406 json->states = json->states_internal;
1000
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diff changeset
407 json->states_capacity = cx_nmemb(json->states_internal);
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diff changeset
408 json->states[0] = JP_STATE_VALUE_BEGIN;
1aecddf7e209 simplify how the json parser works
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diff changeset
409 json->states_size = 1;
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parents: 996
diff changeset
410
1aecddf7e209 simplify how the json parser works
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diff changeset
411 json->vbuf = json->vbuf_internal;
1aecddf7e209 simplify how the json parser works
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diff changeset
412 json->vbuf_capacity = cx_nmemb(json->vbuf_internal);
1007
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parents: 1002
diff changeset
413
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
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parents: 1002
diff changeset
414 cxBufferInit(&json->buffer, NULL, 256, NULL, CX_BUFFER_AUTO_EXTEND);
937
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415 }
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parents:
diff changeset
416
1000
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diff changeset
417 void cxJsonDestroy(CxJson *json) {
1007
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parents: 1002
diff changeset
418 cxBufferDestroy(&json->buffer);
1000
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diff changeset
419 if (json->states != json->states_internal) {
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diff changeset
420 free(json->states);
946
b428424c0214 avoid state buffer allocation for JSON with reasonable nesting depth
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parents: 944
diff changeset
421 }
1000
1aecddf7e209 simplify how the json parser works
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diff changeset
422 if (json->vbuf != json->vbuf_internal) {
1aecddf7e209 simplify how the json parser works
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diff changeset
423 free(json->vbuf);
1aecddf7e209 simplify how the json parser works
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diff changeset
424 }
1aecddf7e209 simplify how the json parser works
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diff changeset
425 cxJsonValueFree(json->parsed);
1aecddf7e209 simplify how the json parser works
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diff changeset
426 json->parsed = NULL;
937
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427 }
10123f4d5618 add first draft of json implementation - relates to #431
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parents:
diff changeset
428
1000
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parents: 996
diff changeset
429 int cxJsonFilln(CxJson *json, const char *buf, size_t size) {
1007
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Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
430 // we use the UCX buffer to write the data
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
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parents: 1002
diff changeset
431 // but reset the position immediately to enable parsing
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
432 size_t old_pos = json->buffer.pos;
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
433 cxBufferSeek(&json->buffer, 0, SEEK_END);
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
434 size_t written = cxBufferWrite(buf, 1, size, &json->buffer);
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
435 if (0 == cxBufferTerminate(&json->buffer)) {
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
436 written++;
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
437 }
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
438 json->buffer.pos = old_pos;
81b2986d2b04 fix that cxBufferSeek() cannot move pos past the end - fixes #523
Mike Becker <universe@uap-core.de>
parents: 1002
diff changeset
439 return written != size + 1;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
440 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
441
1000
1aecddf7e209 simplify how the json parser works
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parents: 996
diff changeset
442 static void json_add_state(CxJson *json, int state) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
443 // we have guaranteed the necessary space with cx_array_simple_reserve()
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
444 // therefore, we can safely add the state in the simplest way possible
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
445 json->states[json->states_size++] = state;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
446 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
447
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
448 #define return_rec(code) \
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
449 token_destroy(&token); \
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
450 return code
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
451
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
452 static enum cx_json_status json_parse(CxJson *json) {
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
453 // Reserve a pointer for a possibly read value
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
454 CxJsonValue *vbuf = NULL;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
455
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
456 // grab the next token
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
457 CxJsonToken token;
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
458 {
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
459 enum cx_json_status ret = token_parse_next(json, &token);
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
460 if (ret != CX_JSON_NO_ERROR) {
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
461 return ret;
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
462 }
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
463 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
464
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
465 // pop the current state
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
466 assert(json->states_size > 0);
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
467 int state = json->states[--json->states_size];
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
468
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
469 // guarantee that at least two more states fit on the stack
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
470 CxArrayReallocator state_realloc = cx_array_reallocator(NULL, json->states_internal);
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
471 if (cx_array_simple_reserve_a(&state_realloc, json->states, 2)) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
472 return CX_JSON_BUFFER_ALLOC_FAILED;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
473 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
474
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
475
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
476 // 0 JP_STATE_VALUE_BEGIN value begin
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
477 // 10 JP_STATE_VALUE_END expect value end
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
478 // 1 JP_STATE_VALUE_BEGIN_OBJ value begin (inside object)
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
479 // 11 JP_STATE_OBJ_SEP_OR_CLOSE object, expect separator, objclose
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
480 // 2 JP_STATE_VALUE_BEGIN_AR value begin (inside array)
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
481 // 12 JP_STATE_ARRAY_SEP_OR_CLOSE array, expect separator or arrayclose
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
482 // 5 JP_STATE_OBJ_NAME_OR_CLOSE object, expect name or objclose
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
483 // 6 JP_STATE_OBJ_NAME object, expect name
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
484 // 7 JP_STATE_OBJ_COLON object, expect ':'
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
485
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
486 if (state < 3) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
487 // push expected end state to the stack
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
488 json_add_state(json, 10 + state);
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
489 switch (token.tokentype) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
490 case CX_JSON_TOKEN_BEGIN_ARRAY: {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
491 if (create_json_value(json, CX_JSON_ARRAY) == NULL) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
492 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
493 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
494 json_add_state(json, JP_STATE_VALUE_BEGIN_AR);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
495 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
496 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
497 case CX_JSON_TOKEN_BEGIN_OBJECT: {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
498 if (create_json_value(json, CX_JSON_OBJECT) == NULL) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
499 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
500 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
501 json_add_state(json, JP_STATE_OBJ_NAME_OR_CLOSE);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
502 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
503 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
504 case CX_JSON_TOKEN_STRING: {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
505 if ((vbuf = create_json_value(json, CX_JSON_STRING)) == NULL) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
506 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
507 }
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
508 cxmutstr str = unescape_string(json->allocator, token.content);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
509 if (str.ptr == NULL) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
510 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
511 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
512 vbuf->value.string = str;
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
513 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
514 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
515 case CX_JSON_TOKEN_INTEGER:
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
516 case CX_JSON_TOKEN_NUMBER: {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
517 int type = token.tokentype == CX_JSON_TOKEN_INTEGER ? CX_JSON_INTEGER : CX_JSON_NUMBER;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
518 if (NULL == (vbuf = create_json_value(json, type))) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
519 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
520 }
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
521 if (parse_number(token.content, &vbuf->value,type == CX_JSON_INTEGER)) {
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
522 return_rec(CX_JSON_FORMAT_ERROR_NUMBER);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
523 }
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
524 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
525 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
526 case CX_JSON_TOKEN_LITERAL: {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
527 if ((vbuf = create_json_value(json, CX_JSON_LITERAL)) == NULL) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
528 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
529 }
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
530 if (0 == cx_strcmp(cx_strcast(token.content), cx_str("true"))) {
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
531 vbuf->value.literal = CX_JSON_TRUE;
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
532 } else if (0 == cx_strcmp(cx_strcast(token.content), cx_str("false"))) {
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
533 vbuf->value.literal = CX_JSON_FALSE;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
534 } else {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
535 vbuf->value.literal = CX_JSON_NULL;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
536 }
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
537 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
538 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
539 default: {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
540 return_rec(CX_JSON_FORMAT_ERROR_UNEXPECTED_TOKEN);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
541 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
542 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
543 } else if (state == JP_STATE_ARRAY_SEP_OR_CLOSE) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
544 // expect ',' or ']'
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
545 if (token.tokentype == CX_JSON_TOKEN_VALUE_SEPARATOR) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
546 json_add_state(json, JP_STATE_VALUE_BEGIN_AR);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
547 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
548 } else if (token.tokentype == CX_JSON_TOKEN_END_ARRAY) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
549 // discard the array from the value buffer
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
550 json->vbuf_size--;
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
551 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
552 } else {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
553 return_rec(CX_JSON_FORMAT_ERROR_UNEXPECTED_TOKEN);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
554 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
555 } else if (state == JP_STATE_OBJ_NAME_OR_CLOSE || state == JP_STATE_OBJ_NAME) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
556 if (state == JP_STATE_OBJ_NAME_OR_CLOSE && token.tokentype == CX_JSON_TOKEN_END_OBJECT) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
557 // discard the obj from the value buffer
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
558 json->vbuf_size--;
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
559 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
560 } else {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
561 // expect string
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
562 if (token.tokentype != CX_JSON_TOKEN_STRING) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
563 return_rec(CX_JSON_FORMAT_ERROR_UNEXPECTED_TOKEN);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
564 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
565
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
566 // add new entry
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
567 cxmutstr name = unescape_string(json->allocator, token.content);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
568 if (name.ptr == NULL) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
569 return_rec(CX_JSON_VALUE_ALLOC_FAILED);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
570 }
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
571 json_obj_add_entry(json, name.ptr);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
572
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
573 // next state
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
574 json_add_state(json, JP_STATE_OBJ_COLON);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
575 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
576 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
577 } else if (state == JP_STATE_OBJ_COLON) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
578 // expect ':'
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
579 if (token.tokentype != CX_JSON_TOKEN_NAME_SEPARATOR) {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
580 return_rec(CX_JSON_FORMAT_ERROR_UNEXPECTED_TOKEN);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
581 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
582 // next state
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
583 json_add_state(json, JP_STATE_VALUE_BEGIN_OBJ);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
584 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
585 } else if (state == JP_STATE_OBJ_SEP_OR_CLOSE) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
586 // expect ',' or '}'
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
587 if (token.tokentype == CX_JSON_TOKEN_VALUE_SEPARATOR) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
588 json_add_state(json, JP_STATE_OBJ_NAME);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
589 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
590 } else if (token.tokentype == CX_JSON_TOKEN_END_OBJECT) {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
591 // discard the obj from the value buffer
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
592 json->vbuf_size--;
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
593 return_rec(CX_JSON_NO_ERROR);
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
594 } else {
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
595 return_rec(CX_JSON_FORMAT_ERROR_UNEXPECTED_TOKEN);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
596 }
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
597 } else {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
598 // should be unreachable
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
599 assert(false);
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
600 return_rec(-1);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
601 }
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
602 }
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
603
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
604 CxJsonStatus cxJsonNext(CxJson *json, CxJsonValue **value) {
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
605 // initialize output value
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
606 *value = &cx_json_value_nothing;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
607
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
608 // parse data
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
609 CxJsonStatus result;
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
610 do {
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
611 result = json_parse(json);
1008
3b69f025f083 json: enable multiple subsequent fills - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1007
diff changeset
612 cxBufferShiftLeft(&json->buffer, json->buffer.pos);
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
613 if (result == CX_JSON_NO_ERROR && json->states_size == 1) {
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
614 // final state reached
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
615 assert(json->states[0] == JP_STATE_VALUE_END);
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
616 assert(json->vbuf_size == 0);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
617
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
618 // write output value
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
619 *value = json->parsed;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
620 json->parsed = NULL;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
621
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
622 // re-initialize state machine
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
623 json->states[0] = JP_STATE_VALUE_BEGIN;
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
624
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
625 return CX_JSON_NO_ERROR;
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
626 }
1002
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
627 } while (result == CX_JSON_NO_ERROR);
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
628
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
629 // the parser might think there is no data
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
630 // but when we did not reach the final state,
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
631 // we know that there must be more to come
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
632 if (result == CX_JSON_NO_DATA && json->states_size > 1) {
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
633 return CX_JSON_INCOMPLETE_DATA;
1483c47063a8 add status codes to json parser - relates to #431
Mike Becker <universe@uap-core.de>
parents: 1000
diff changeset
634 }
1000
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
635
1aecddf7e209 simplify how the json parser works
Mike Becker <universe@uap-core.de>
parents: 996
diff changeset
636 return result;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
637 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
638
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
639 void cxJsonValueFree(CxJsonValue *value) {
1012
21884374edbb add documentation - resolves #431
Mike Becker <universe@uap-core.de>
parents: 1009
diff changeset
640 if (value == NULL || value->type == CX_JSON_NOTHING) return;
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
641 switch (value->type) {
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
642 case CX_JSON_OBJECT: {
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
643 CxJsonObject obj = value->value.object;
967
a58f602ed2fe simplify parsing of array and object elements
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
644 for (size_t i = 0; i < obj.values_size; i++) {
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
645 cxJsonValueFree(obj.values[i].value);
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
646 cxFree(value->allocator, obj.values[i].name);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
647 }
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
648 cxFree(value->allocator, obj.values);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
649 break;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
650 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
651 case CX_JSON_ARRAY: {
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
652 CxJsonArray array = value->value.array;
967
a58f602ed2fe simplify parsing of array and object elements
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
653 for (size_t i = 0; i < array.array_size; i++) {
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
654 cxJsonValueFree(array.array[i]);
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
655 }
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
656 cxFree(value->allocator, array.array);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
657 break;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
658 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
659 case CX_JSON_STRING: {
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
660 cxFree(value->allocator, value->value.string.ptr);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
661 break;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
662 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
663 default: {
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
664 break;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
665 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
666 }
996
333155f234c4 add support for allocators to the json parser
Olaf Wintermann <olaf.wintermann@gmail.com>
parents: 976
diff changeset
667 cxFree(value->allocator, value);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
668 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
669
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1008
diff changeset
670 CxJsonValue *cxJsonArrGet(const CxJsonValue *value, size_t index) {
967
a58f602ed2fe simplify parsing of array and object elements
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
671 if (index >= value->value.array.array_size) {
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
672 return &cx_json_value_nothing;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
673 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
674 return value->value.array.array[index];
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
675 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
676
1009
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1008
diff changeset
677 CxJsonValue *cxJsonObjGet(const CxJsonValue *value, const char *name) {
7650e722437e minor cleanup
Mike Becker <universe@uap-core.de>
parents: 1008
diff changeset
678 const CxJsonObject *obj = &(value->value.object);
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
679 // TODO: think about sorting the object so that we can use binary search here
967
a58f602ed2fe simplify parsing of array and object elements
Mike Becker <universe@uap-core.de>
parents: 965
diff changeset
680 for (size_t i = 0; i < obj->values_size; i++) {
937
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
681 if (0 == strcmp(name, obj->values[i].name)) {
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
682 return obj->values[i].value;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
683 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
684 }
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
685 return &cx_json_value_nothing;
10123f4d5618 add first draft of json implementation - relates to #431
Mike Becker <universe@uap-core.de>
parents:
diff changeset
686 }

mercurial