comparison: ucx/properties.c
ucx/properties.c
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2017 Mike Becker, Olaf Wintermann All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include "ucx/properties.h" | |
| 30 | |
| 31 #include <stdio.h> | |
| 32 #include <stdlib.h> | |
| 33 #include <string.h> | |
| 34 | |
| 35 UcxProperties *ucx_properties_new() { | |
| 36 UcxProperties *parser = (UcxProperties*)malloc( | |
| 37 sizeof(UcxProperties)); | |
| 38 if(!parser) { | |
| 39 return NULL; | |
| 40 } | |
| 41 | |
| 42 parser->buffer = NULL; | |
| 43 parser->buflen = 0; | |
| 44 parser->pos = 0; | |
| 45 parser->tmp = NULL; | |
| 46 parser->tmplen = 0; | |
| 47 parser->tmpcap = 0; | |
| 48 parser->error = 0; | |
| 49 parser->delimiter = '='; | |
| 50 parser->comment1 = '#'; | |
| 51 parser->comment2 = 0; | |
| 52 parser->comment3 = 0; | |
| 53 | |
| 54 return parser; | |
| 55 } | |
| 56 | |
| 57 void ucx_properties_free(UcxProperties *parser) { | |
| 58 if(parser->tmp) { | |
| 59 free(parser->tmp); | |
| 60 } | |
| 61 free(parser); | |
| 62 } | |
| 63 | |
| 64 void ucx_properties_fill(UcxProperties *parser, char *buf, size_t len) { | |
| 65 parser->buffer = buf; | |
| 66 parser->buflen = len; | |
| 67 parser->pos = 0; | |
| 68 } | |
| 69 | |
| 70 static void parser_tmp_append(UcxProperties *parser, char *buf, size_t len) { | |
| 71 if(parser->tmpcap - parser->tmplen < len) { | |
| 72 size_t newcap = parser->tmpcap + len + 64; | |
| 73 parser->tmp = (char*)realloc(parser->tmp, newcap); | |
| 74 parser->tmpcap = newcap; | |
| 75 } | |
| 76 memcpy(parser->tmp + parser->tmplen, buf, len); | |
| 77 parser->tmplen += len; | |
| 78 } | |
| 79 | |
| 80 int ucx_properties_next(UcxProperties *parser, sstr_t *name, sstr_t *value) { | |
| 81 if(parser->tmplen > 0) { | |
| 82 char *buf = parser->buffer + parser->pos; | |
| 83 size_t len = parser->buflen - parser->pos; | |
| 84 sstr_t str = sstrn(buf, len); | |
| 85 sstr_t nl = sstrchr(str, '\n'); | |
| 86 if(nl.ptr) { | |
| 87 size_t newlen = (size_t)(nl.ptr - buf) + 1; | |
| 88 parser_tmp_append(parser, buf, newlen); | |
| 89 // the tmp buffer contains exactly one line now | |
| 90 | |
| 91 char *orig_buf = parser->buffer; | |
| 92 size_t orig_len = parser->buflen; | |
| 93 | |
| 94 parser->buffer = parser->tmp; | |
| 95 parser->buflen = parser->tmplen; | |
| 96 parser->pos = 0; | |
| 97 parser->tmp = NULL; | |
| 98 parser->tmpcap = 0; | |
| 99 parser->tmplen = 0; | |
| 100 // run ucx_properties_next with the tmp buffer as main buffer | |
| 101 int ret = ucx_properties_next(parser, name, value); | |
| 102 | |
| 103 // restore original buffer | |
| 104 parser->tmp = parser->buffer; | |
| 105 parser->buffer = orig_buf; | |
| 106 parser->buflen = orig_len; | |
| 107 parser->pos = newlen; | |
| 108 | |
| 109 /* | |
| 110 * if ret == 0 the tmp buffer contained just space or a comment | |
| 111 * we parse again with the original buffer to get a name/value | |
| 112 * or a new tmp buffer | |
| 113 */ | |
| 114 return ret ? ret : ucx_properties_next(parser, name, value); | |
| 115 } else { | |
| 116 parser_tmp_append(parser, buf, len); | |
| 117 return 0; | |
| 118 } | |
| 119 } else if(parser->tmp) { | |
| 120 free(parser->tmp); | |
| 121 parser->tmp = NULL; | |
| 122 } | |
| 123 | |
| 124 char comment1 = parser->comment1; | |
| 125 char comment2 = parser->comment2; | |
| 126 char comment3 = parser->comment3; | |
| 127 char delimiter = parser->delimiter; | |
| 128 | |
| 129 // get one line and parse it | |
| 130 while(parser->pos < parser->buflen) { | |
| 131 char *buf = parser->buffer + parser->pos; | |
| 132 size_t len = parser->buflen - parser->pos; | |
| 133 | |
| 134 /* | |
| 135 * First we check if we have at least one line. We also get indices of | |
| 136 * delimiter and comment chars | |
| 137 */ | |
| 138 size_t delimiter_index = 0; | |
| 139 size_t comment_index = 0; | |
| 140 int has_comment = 0; | |
| 141 | |
| 142 size_t i = 0; | |
| 143 char c = 0; | |
| 144 for(;i<len;i++) { | |
| 145 c = buf[i]; | |
| 146 if(c == comment1 || c == comment2 || c == comment3) { | |
| 147 if(comment_index == 0) { | |
| 148 comment_index = i; | |
| 149 has_comment = 1; | |
| 150 } | |
| 151 } else if(c == delimiter) { | |
| 152 if(delimiter_index == 0 && !has_comment) { | |
| 153 delimiter_index = i; | |
| 154 } | |
| 155 } else if(c == '\n') { | |
| 156 break; | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 if(c != '\n') { | |
| 161 // we don't have enough data for a line | |
| 162 // store remaining bytes in temporary buffer for next round | |
| 163 parser->tmpcap = len + 128; | |
| 164 parser->tmp = (char*)malloc(parser->tmpcap); | |
| 165 parser->tmplen = len; | |
| 166 memcpy(parser->tmp, buf, len); | |
| 167 return 0; | |
| 168 } | |
| 169 | |
| 170 sstr_t line = has_comment ? sstrn(buf, comment_index) : sstrn(buf, i); | |
| 171 // check line | |
| 172 if(delimiter_index == 0) { | |
| 173 line = sstrtrim(line); | |
| 174 if(line.length != 0) { | |
| 175 parser->error = 1; | |
| 176 } | |
| 177 } else { | |
| 178 sstr_t n = sstrn(buf, delimiter_index); | |
| 179 sstr_t v = sstrn( | |
| 180 buf + delimiter_index + 1, | |
| 181 line.length - delimiter_index - 1); | |
| 182 n = sstrtrim(n); | |
| 183 v = sstrtrim(v); | |
| 184 if(n.length != 0 || v.length != 0) { | |
| 185 *name = n; | |
| 186 *value = v; | |
| 187 parser->pos += i + 1; | |
| 188 return 1; | |
| 189 } else { | |
| 190 parser->error = 1; | |
| 191 } | |
| 192 } | |
| 193 | |
| 194 parser->pos += i + 1; | |
| 195 } | |
| 196 | |
| 197 return 0; | |
| 198 } | |
| 199 | |
| 200 int ucx_properties2map(UcxProperties *parser, UcxMap *map) { | |
| 201 sstr_t name; | |
| 202 sstr_t value; | |
| 203 while(ucx_properties_next(parser, &name, &value)) { | |
| 204 value = sstrdup_a(map->allocator, value); | |
| 205 if(!value.ptr) { | |
| 206 return 1; | |
| 207 } | |
| 208 if(ucx_map_sstr_put(map, name, value.ptr)) { | |
| 209 alfree(map->allocator, value.ptr); | |
| 210 return 1; | |
| 211 } | |
| 212 } | |
| 213 if (parser->error) { | |
| 214 return parser->error; | |
| 215 } else { | |
| 216 return 0; | |
| 217 } | |
| 218 } | |
| 219 | |
| 220 // buffer size is documented - change doc, when you change bufsize! | |
| 221 #define UCX_PROPLOAD_BUFSIZE 1024 | |
| 222 int ucx_properties_load(UcxMap *map, FILE *file) { | |
| 223 UcxProperties *parser = ucx_properties_new(); | |
| 224 if(!(parser && map && file)) { | |
| 225 return 1; | |
| 226 } | |
| 227 | |
| 228 int error = 0; | |
| 229 size_t r; | |
| 230 char buf[UCX_PROPLOAD_BUFSIZE]; | |
| 231 while((r = fread(buf, 1, UCX_PROPLOAD_BUFSIZE, file)) != 0) { | |
| 232 ucx_properties_fill(parser, buf, r); | |
| 233 error = ucx_properties2map(parser, map); | |
| 234 if (error) { | |
| 235 break; | |
| 236 } | |
| 237 } | |
| 238 ucx_properties_free(parser); | |
| 239 return error; | |
| 240 } | |
| 241 | |
| 242 int ucx_properties_store(UcxMap *map, FILE *file) { | |
| 243 UcxMapIterator iter = ucx_map_iterator(map); | |
| 244 void *v; | |
| 245 sstr_t value; | |
| 246 size_t written; | |
| 247 | |
| 248 UCX_MAP_FOREACH(k, v, iter) { | |
| 249 value = sstr((char*)v); | |
| 250 | |
| 251 written = 0; | |
| 252 written += fwrite(k.data, 1, k.len, file); | |
| 253 written += fwrite(" = ", 1, 3, file); | |
| 254 written += fwrite(value.ptr, 1, value.length, file); | |
| 255 written += fwrite("\n", 1, 1, file); | |
| 256 | |
| 257 if (written != k.len + value.length + 4) { | |
| 258 return 1; | |
| 259 } | |
| 260 } | |
| 261 | |
| 262 return 0; | |
| 263 } | |
| 264 |
