211 lines
5.5 KiB
C
211 lines
5.5 KiB
C
/*
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* Copyright © 2013 Ran Benita <ran234@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include "utils.h"
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#ifdef HAVE_MMAP
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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bool
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map_file(FILE *file, char **string_out, size_t *size_out)
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{
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struct stat stat_buf;
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int fd;
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char *string;
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/* Make sure to keep the errno on failure! */
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fd = fileno(file);
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if (fd < 0)
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return false;
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if (fstat(fd, &stat_buf) != 0)
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return false;
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string = mmap(NULL, stat_buf.st_size, PROT_READ, MAP_SHARED, fd, 0);
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if (string == MAP_FAILED)
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return false;
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*string_out = string;
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*size_out = stat_buf.st_size;
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return true;
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}
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void
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unmap_file(char *str, size_t size)
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{
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munmap(str, size);
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}
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#else
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bool
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map_file(FILE *file, char **string_out, size_t *size_out)
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{
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long ret;
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size_t ret_s;
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char *string;
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size_t size;
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/* Make sure to keep the errno on failure! */
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ret = fseek(file, 0, SEEK_END);
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if (ret != 0)
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return false;
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ret = ftell(file);
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if (ret < 0)
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return false;
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size = (size_t) ret;
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ret = fseek(file, 0, SEEK_SET);
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if (ret < 0)
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return false;
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string = malloc(size);
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if (!string)
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return false;
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ret_s = fread(string, 1, size, file);
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if (ret_s < size) {
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free(string);
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return false;
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}
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*string_out = string;
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*size_out = size;
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return true;
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}
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void
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unmap_file(char *str, size_t size)
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{
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free(str);
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}
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#endif
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// ASCII lower-case map.
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static const unsigned char lower_map[] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
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21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58,
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59, 60, 61, 62, 63, 64, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
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108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122,
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91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
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108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122,
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123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137,
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138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152,
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153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167,
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168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182,
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183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197,
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198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212,
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213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227,
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228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242,
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243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
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};
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// ASCII tolower (to avoid locale issues).
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char
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to_lower(char c)
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{
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return (char) lower_map[(unsigned char) c];
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}
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// ASCII strcasecmp (to avoid locale issues).
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int
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istrcmp(const char *a, const char *b)
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{
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for (size_t i = 0; ; i++) {
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if (to_lower(a[i]) != to_lower(b[i]))
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return (int) to_lower(a[i]) - (int) to_lower(b[i]);
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if (!a[i])
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break;
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}
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return 0;
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}
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// ASCII strncasecmp (to avoid locale issues).
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int
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istrncmp(const char *a, const char *b, size_t n)
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{
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for (size_t i = 0; i < n; i++) {
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if (to_lower(a[i]) != to_lower(b[i]))
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return (int) to_lower(a[i]) - (int) to_lower(b[i]);
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if (!a[i])
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break;
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}
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return 0;
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}
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#if !(defined(HAVE_ASPRINTF) && HAVE_ASPRINTF)
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int
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asprintf(char **strp, const char *fmt, ...)
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{
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int ret;
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va_list ap;
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va_start(ap, fmt);
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ret = vasprintf(strp, fmt, ap);
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va_end(ap);
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return ret;
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}
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# if !(defined(HAVE_VASPRINTF) && HAVE_VASPRINTF)
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int
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vasprintf(char **strp, const char *fmt, va_list ap)
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{
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int ret;
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char *buf;
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va_list ap_copy;
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/*
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* The value of the va_list parameter is undefined after the call to
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* vsnprintf() returns: pass a copy to make sure "ap" remains valid.
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*/
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va_copy(ap_copy, ap);
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ret = vsnprintf(NULL, 0, fmt, ap_copy);
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va_end(ap_copy);
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if (ret < 0)
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return ret;
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if (!(buf = malloc(ret + 1)))
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return -1;
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if ((ret = vsnprintf(buf, ret + 1, fmt, ap)) < 0) {
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free(buf);
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return ret;
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}
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*strp = buf;
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return ret;
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}
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# endif /* !HAVE_VASPRINTF */
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#endif /* !HAVE_ASPRINTF */
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