Tue, 17 Sep 2024 23:37:15 +0200
fix for empty arrays
relates to #424
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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 2021 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 "cx/printf.h" |
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30 | |
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31 | #include <stdio.h> |
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32 | #include <string.h> |
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33 | |
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34 | #ifndef CX_PRINTF_SBO_SIZE |
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35 | #define CX_PRINTF_SBO_SIZE 512 |
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36 | #endif |
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37 | unsigned const cx_printf_sbo_size = CX_PRINTF_SBO_SIZE; |
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38 | |
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39 | int cx_fprintf( |
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40 | void *stream, |
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41 | cx_write_func wfc, |
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42 | char const *fmt, |
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43 | ... |
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44 | ) { |
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45 | int ret; |
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46 | va_list ap; |
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47 | va_start(ap, fmt); |
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48 | ret = cx_vfprintf(stream, wfc, fmt, ap); |
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49 | va_end(ap); |
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50 | return ret; |
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51 | } |
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52 | |
644 | 53 | int cx_vfprintf( |
54 | void *stream, | |
55 | cx_write_func wfc, | |
56 | char const *fmt, | |
57 | va_list ap | |
58 | ) { | |
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59 | char buf[CX_PRINTF_SBO_SIZE]; |
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60 | va_list ap2; |
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61 | va_copy(ap2, ap); |
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62 | int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap); |
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63 | if (ret < 0) { |
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64 | va_end(ap2); |
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65 | return ret; |
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66 | } else if (ret < CX_PRINTF_SBO_SIZE) { |
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67 | va_end(ap2); |
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68 | return (int) wfc(buf, 1, ret, stream); |
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69 | } else { |
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70 | int len = ret + 1; |
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71 | char *newbuf = malloc(len); |
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72 | if (!newbuf) { |
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73 | va_end(ap2); |
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74 | return -1; |
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75 | } |
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76 | |
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77 | ret = vsnprintf(newbuf, len, fmt, ap2); |
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78 | va_end(ap2); |
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79 | if (ret > 0) { |
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80 | ret = (int) wfc(newbuf, 1, ret, stream); |
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81 | } |
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82 | free(newbuf); |
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83 | } |
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84 | return ret; |
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85 | } |
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86 | |
644 | 87 | cxmutstr cx_asprintf_a( |
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88 | CxAllocator const *allocator, |
644 | 89 | char const *fmt, |
90 | ... | |
91 | ) { | |
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92 | va_list ap; |
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93 | va_start(ap, fmt); |
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94 | cxmutstr ret = cx_vasprintf_a(allocator, fmt, ap); |
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95 | va_end(ap); |
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96 | return ret; |
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97 | } |
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98 | |
644 | 99 | cxmutstr cx_vasprintf_a( |
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100 | CxAllocator const *a, |
644 | 101 | char const *fmt, |
102 | va_list ap | |
103 | ) { | |
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104 | cxmutstr s; |
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105 | s.ptr = NULL; |
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106 | s.length = 0; |
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107 | char buf[CX_PRINTF_SBO_SIZE]; |
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108 | va_list ap2; |
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109 | va_copy(ap2, ap); |
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110 | int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap); |
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111 | if (ret >= 0 && ret < CX_PRINTF_SBO_SIZE) { |
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112 | s.ptr = cxMalloc(a, ret + 1); |
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113 | if (s.ptr) { |
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114 | s.length = (size_t) ret; |
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115 | memcpy(s.ptr, buf, ret); |
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116 | s.ptr[s.length] = '\0'; |
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117 | } |
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118 | } else { |
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119 | int len = ret + 1; |
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120 | s.ptr = cxMalloc(a, len); |
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121 | if (s.ptr) { |
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122 | ret = vsnprintf(s.ptr, len, fmt, ap2); |
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123 | if (ret < 0) { |
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124 | free(s.ptr); |
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125 | s.ptr = NULL; |
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126 | } else { |
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127 | s.length = (size_t) ret; |
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128 | } |
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129 | } |
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130 | } |
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131 | va_end(ap2); |
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132 | return s; |
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133 | } |
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134 | |
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135 | int cx_sprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, ... ) { |
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136 | va_list ap; |
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137 | va_start(ap, fmt); |
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138 | int ret = cx_vsprintf_a(alloc, str, len, fmt, ap); |
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139 | va_end(ap); |
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140 | return ret; |
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141 | } |
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142 | |
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143 | int cx_vsprintf_a(CxAllocator *alloc, char **str, size_t *len, const char *fmt, va_list ap) { |
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144 | va_list ap2; |
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145 | va_copy(ap2, ap); |
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146 | int ret = vsnprintf(*str, *len, fmt, ap); |
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147 | if ((unsigned) ret >= *len) { |
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148 | unsigned newlen = ret + 1; |
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149 | char *ptr = cxRealloc(alloc, *str, newlen); |
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150 | if (ptr) { |
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151 | int newret = vsnprintf(ptr, newlen, fmt, ap2); |
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152 | if (newret < 0) { |
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153 | cxFree(alloc, ptr); |
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154 | } else { |
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155 | *len = newlen; |
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156 | *str = ptr; |
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157 | ret = newret; |
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158 | } |
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159 | } |
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160 | } |
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161 | va_end(ap2); |
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162 | return ret; |
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163 | } |
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164 | |
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165 | int cx_sprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, ... ) { |
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166 | va_list ap; |
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167 | va_start(ap, fmt); |
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168 | int ret = cx_vsprintf_sa(alloc, buf, len, str, fmt, ap); |
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169 | va_end(ap); |
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170 | return ret; |
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171 | } |
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172 | |
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173 | int cx_vsprintf_sa(CxAllocator *alloc, char *buf, size_t *len, char **str, const char *fmt, va_list ap) { |
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174 | va_list ap2; |
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175 | va_copy(ap2, ap); |
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176 | int ret = vsnprintf(buf, *len, fmt, ap); |
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177 | *str = buf; |
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178 | if ((unsigned) ret >= *len) { |
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179 | unsigned newlen = ret + 1; |
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180 | char *ptr = cxMalloc(alloc, newlen); |
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181 | if (ptr) { |
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182 | int newret = vsnprintf(ptr, newlen, fmt, ap2); |
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183 | if (newret < 0) { |
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184 | cxFree(alloc, ptr); |
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185 | } else { |
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186 | *len = newlen; |
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187 | *str = ptr; |
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188 | ret = newret; |
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189 | } |
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190 | } |
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191 | } |
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192 | va_end(ap2); |
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193 | return ret; |
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194 | } |