src/highlighter.c

Mon, 03 Oct 2022 12:56:28 +0200

author
Mike Becker <universe@uap-core.de>
date
Mon, 03 Oct 2022 12:56:28 +0200
changeset 65
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parent 61
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child 67
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permissions
-rw-r--r--

rewrite Makefile to work with different getopt implementations

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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 2016 Mike Becker. 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
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30 #include "highlighter.h"
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31
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32 #include <stdlib.h>
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33 #include <stdio.h>
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34 #include <string.h>
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35 #include <ctype.h>
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36 #include <ucx/string.h>
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37 #include <ucx/utils.h>
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38
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39 static void put_htmlescaped(UcxBuffer *dest, char c) {
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40 if (c == '>') {
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41 ucx_buffer_puts(dest, "&gt;");
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42 } else if (c == '<') {
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43 ucx_buffer_puts(dest, "&lt;");
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44 } else if (c) {
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45 ucx_buffer_putc(dest, c);
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46 }
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47 }
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48
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49 static void put_htmlescapedstr(UcxBuffer *dest, sstr_t s) {
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50 for (int i = 0 ; i < s.length ; i++) {
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51 put_htmlescaped(dest, s.ptr[i]);
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52 }
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53 }
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54
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55 static int check_keyword(sstr_t word, const char** keywords) {
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56 for (int i = 0 ; keywords[i] ; i++) {
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57 if (sstrcmp(word, sstr((char*)keywords[i])) == 0) {
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58 return 1;
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59 }
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60 }
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61 return 0;
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62 }
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63
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64 static int check_capsonly(sstr_t word) {
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65 for (size_t i = 0 ; i < word.length ; i++) {
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66 if (!isupper(word.ptr[i]) && !isdigit(word.ptr[i])
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67 && word.ptr[i] != '_') {
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68 return 0;
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69 }
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70 }
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71 return 1;
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72 }
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73
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74 /* Plaintext Highlighter */
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75
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76 void c2html_plain_highlighter(char *src, UcxBuffer *dest,
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77 c2html_highlighter_data *hd) {
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78 while (*src && *src != '\n') {
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79 if (*src != '\r') {
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80 put_htmlescaped(dest, *src);
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81 }
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82 src++;
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83 }
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84 ucx_buffer_putc(dest, '\n');
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85 }
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86
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87 /* C Highlighter */
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88
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89 static const char* ckeywords[] = {
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90 "auto", "break", "case", "char", "const", "continue", "default", "do",
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91 "double", "else", "enum", "extern", "float", "for", "goto", "if", "int",
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92 "long", "register", "return", "short", "signed", "sizeof", "static",
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93 "struct", "switch", "typedef", "union", "unsigned", "void", "volatile",
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94 "while", NULL
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95 };
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96
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97 void c2html_c_highlighter(char *src, UcxBuffer *dest,
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98 c2html_highlighter_data *hd) {
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99 /* reset buffers without clearing them */
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100 hd->primary_buffer->size = hd->primary_buffer->pos = 0;
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101 hd->secondary_buffer->size = hd->secondary_buffer->pos = 0;
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102
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103 /* alias the buffers for better handling */
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104 UcxBuffer *wbuf = hd->primary_buffer;
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105 UcxBuffer *ifilebuf = hd->secondary_buffer;
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106
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107 /* local information */
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108 size_t sp = (size_t)-1;
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109 int isstring = 0, iscomment = 0, isinclude = 0, parseinclude = 0;
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110 char quote = '\0';
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111 int isescaping = 0;
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112
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113 /* continue a multi line comment highlighting */
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114 if (hd->multiline_comment) {
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115 iscomment = 1;
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116 ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
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117 }
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118
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119 char c;
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120 do {
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121 c = src[++sp];
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122 if (c == '\r') continue;
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123
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124 /* comments */
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125 if (!isstring && c == '/') {
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126 if (hd->multiline_comment && sp > 0 && src[sp-1] == '*') {
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127 iscomment = 0;
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128 hd->multiline_comment = 0;
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129 ucx_buffer_puts(dest, "/</span>");
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130 continue;
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131 } else if (!iscomment && (src[sp+1] == '/' || src[sp+1] == '*')) {
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132 iscomment = 1;
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133 hd->multiline_comment = (src[sp+1] == '*');
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134 ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
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135 }
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136 }
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137
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138 if (iscomment) {
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139 if (c == '\n') {
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140 ucx_buffer_puts(dest, "</span>\n");
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141 } else {
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142 put_htmlescaped(dest, c);
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143 }
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144 } else if (isinclude) {
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145 if (c == '<') {
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146 ucx_buffer_puts(dest,
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147 "<span class=\"c2html-stdinclude\">&lt;");
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148 } else if (c == '\"') {
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149 if (parseinclude) {
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150 ucx_buffer_puts(dest, "\">");
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151 ucx_buffer_write(ifilebuf->space, 1, ifilebuf->size, dest);
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152 ucx_buffer_puts(dest, "\"</a>");
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153 parseinclude = 0;
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154 } else {
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155 ucx_buffer_puts(dest,
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156 "<a class=\"c2html-userinclude\" href=\"");
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157 ucx_buffer_putc(ifilebuf, '\"');
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158 parseinclude = 1;
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159 }
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160 } else if (c == '>') {
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161 ucx_buffer_puts(dest, "&gt;</span>");
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162 } else {
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163 if (parseinclude) {
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164 ucx_buffer_putc(ifilebuf, c);
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165 }
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166 put_htmlescaped(dest, c);
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167 }
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168 } else {
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169 /* strings */
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170 if (!isescaping && (c == '\'' || c == '\"')) {
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171 if (isstring) {
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172 put_htmlescaped(dest, c);
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173 if (c == quote) {
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174 isstring = 0;
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175 ucx_buffer_puts(dest, "</span>");
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176 } else {
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177 put_htmlescaped(dest, c);
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178 }
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179 } else {
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180 isstring = 1;
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181 quote = c;
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182 ucx_buffer_puts(dest, "<span class=\"c2html-string\">");
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183 put_htmlescaped(dest, c);
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184 }
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185 } else {
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186 if (isstring) {
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187 put_htmlescaped(dest, c);
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188 } else if (isalnum(c) || c == '_' || c == '#') {
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189 /* buffer the current word */
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190 ucx_buffer_putc(wbuf, c);
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191 } else {
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192 /* write buffered word, if any */
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193 if (wbuf->size > 0) {
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194 sstr_t word = sstrn(wbuf->space, wbuf->size);
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195 int closespan = 1;
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196 sstr_t typesuffix = ST("_t");
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197 if (check_keyword(word, ckeywords)) {
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198 ucx_buffer_puts(dest,
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199 "<span class=\"c2html-keyword\">");
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200 } else if (sstrsuffix(word, typesuffix)) {
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201 ucx_buffer_puts(dest,
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202 "<span class=\"c2html-type\">");
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203 } else if (word.ptr[0] == '#') {
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204 isinclude = !sstrcmp(word, S("#include"));
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205 ucx_buffer_puts(dest,
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206 "<span class=\"c2html-directive\">");
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207 } else if (check_capsonly(word)) {
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208 ucx_buffer_puts(dest,
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209 "<span class=\"c2html-macroconst\">");
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210 } else {
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211 closespan = 0;
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212 }
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213 put_htmlescapedstr(dest, word);
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214 if (closespan) {
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215 ucx_buffer_puts(dest, "</span>");
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216 }
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217 }
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218 wbuf->pos = wbuf->size = 0; /* reset word buffer */
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219
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220 /* write current character */
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221 put_htmlescaped(dest, c);
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222 }
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223 }
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224
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225 isescaping = !isescaping & (c == '\\');
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226 }
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227 } while (c && c != '\n');
52
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228 }
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229
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230 /* Java Highlighter */
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231
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232 static const char* jkeywords[] = {
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233 "abstract", "continue", "for", "new", "switch", "assert", "default", "goto",
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234 "package", "synchronized", "boolean", "do", "if", "private", "this",
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235 "break", "double", "implements", "protected", "throw", "byte", "else",
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236 "import", "public", "throws", "case", "enum", "instanceof", "return",
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237 "transient", "catch", "extends", "int", "short", "try", "char", "final",
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238 "interface", "static", "void", "class", "finally", "long", "strictfp",
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239 "volatile", "const", "float", "native", "super", "while", NULL
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240 };
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241
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242 void c2html_java_highlighter(char *src, UcxBuffer *dest,
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243 c2html_highlighter_data *hd) {
52
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244 /* reset buffers without clearing them */
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245 hd->primary_buffer->size = hd->primary_buffer->pos = 0;
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246 hd->secondary_buffer->size = hd->secondary_buffer->pos = 0;
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247
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248 /* alias the buffers for better handling */
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249 UcxBuffer *wbuf = hd->primary_buffer;
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250
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251 /* local information */
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252 size_t sp = (size_t)-1;
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253 int isstring = 0, iscomment = 0, isimport = 0;
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254 char quote = '\0';
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255 int isescaping = 0;
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256
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257 if (hd->multiline_comment) {
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258 iscomment = 1;
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259 ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
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260 }
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261
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262 char c;
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263 do {
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264 c = src[++sp];
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265 if (c == '\r') continue;
52
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266
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267 /* comments */
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268 if (!isstring && c == '/') {
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269 if (hd->multiline_comment && sp > 0 && src[sp-1] == '*') {
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270 iscomment = 0;
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271 hd->multiline_comment = 0;
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272 ucx_buffer_puts(dest, "/</span>");
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273 continue;
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274 } else if (!iscomment && (src[sp+1] == '/' || src[sp+1] == '*')) {
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275 iscomment = 1;
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276 hd->multiline_comment = (src[sp+1] == '*');
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277 ucx_buffer_puts(dest, "<span class=\"c2html-comment\">");
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278 }
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279 }
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280
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281 if (iscomment) {
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282 if (c == '\n') {
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283 ucx_buffer_puts(dest, "</span>\n");
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284 } else {
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285 put_htmlescaped(dest, c);
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286 }
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287 } else if (isimport) {
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288 /* TODO: local imports */
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289 } else {
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290 /* strings */
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291 if (!isescaping && (c == '\'' || c == '\"')) {
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292 if (isstring) {
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293 put_htmlescaped(dest, c);
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294 if (c == quote) {
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295 isstring = 0;
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296 ucx_buffer_puts(dest, "</span>");
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297 } else {
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298 put_htmlescaped(dest, c);
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299 }
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300 } else {
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301 isstring = 1;
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302 quote = c;
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303 ucx_buffer_puts(dest,
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304 "<span class=\"c2html-string\">");
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305 put_htmlescaped(dest, c);
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306 }
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307 } else {
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308 if (isstring) {
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309 put_htmlescaped(dest, c);
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310 } else if (isalnum(c) || c == '_' || c == '@') {
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311 /* buffer the current word */
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312 ucx_buffer_putc(wbuf, c);
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313 } else {
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314 /* write buffered word, if any */
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315 if (wbuf->size > 0) {
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316 sstr_t word = sstrn(wbuf->space, wbuf->size);
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317 int closespan = 1;
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318 if (check_keyword(word, jkeywords)) {
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319 ucx_buffer_puts(dest,
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320 "<span class=\"c2html-keyword\">");
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321 } else if (isupper(word.ptr[0])) {
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322 ucx_buffer_puts(dest,
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323 "<span class=\"c2html-type\">");
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324 } else if (word.ptr[0] == '@') {
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325 ucx_buffer_puts(dest,
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326 "<span class=\"c2html-directive\">");
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327 } else if (check_capsonly(word)) {
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328 ucx_buffer_puts(dest,
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329 "<span class=\"c2html-macroconst\">");
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330 } else {
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331 closespan = 0;
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332 }
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333 put_htmlescapedstr(dest, word);
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334
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335 if (closespan) {
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336 ucx_buffer_puts(dest, "</span>");
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337 }
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338 }
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339 wbuf->pos = wbuf->size = 0; /* reset buffer */
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340
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341 /* write current character */
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342 put_htmlescaped(dest, c);
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343 }
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344 }
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345
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346 isescaping = !isescaping & (c == '\\');
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347 }
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348 } while (c && c != '\n');
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349 }
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350

mercurial