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| 1 /* | |
| 2 * getopt.c | |
| 3 * | |
| 4 * a minimal implementation of the getopt() function, written so that | |
| 5 * test applications that use that function can run on non-POSIX | |
| 6 * platforms | |
| 7 * | |
| 8 */ | |
| 9 /* | |
| 10 * | |
| 11 * Copyright (c) 2001-2006 Cisco Systems, Inc. | |
| 12 * All rights reserved. | |
| 13 * | |
| 14 * Redistribution and use in source and binary forms, with or without | |
| 15 * modification, are permitted provided that the following conditions | |
| 16 * are met: | |
| 17 * | |
| 18 * Redistributions of source code must retain the above copyright | |
| 19 * notice, this list of conditions and the following disclaimer. | |
| 20 * | |
| 21 * Redistributions in binary form must reproduce the above | |
| 22 * copyright notice, this list of conditions and the following | |
| 23 * disclaimer in the documentation and/or other materials provided | |
| 24 * with the distribution. | |
| 25 * | |
| 26 * Neither the name of the Cisco Systems, Inc. nor the names of its | |
| 27 * contributors may be used to endorse or promote products derived | |
| 28 * from this software without specific prior written permission. | |
| 29 * | |
| 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 41 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 42 * | |
| 43 */ | |
| 44 | |
| 45 #include <stdlib.h> /* for NULL */ | |
| 46 | |
| 47 int optind_s = 0; | |
| 48 | |
| 49 char *optarg_s; | |
| 50 | |
| 51 #define GETOPT_FOUND_WITHOUT_ARGUMENT 2 | |
| 52 #define GETOPT_FOUND_WITH_ARGUMENT 1 | |
| 53 #define GETOPT_NOT_FOUND 0 | |
| 54 | |
| 55 static int | |
| 56 getopt_check_character(char c, const char *string) { | |
| 57 unsigned int max_string_len = 128; | |
| 58 | |
| 59 while (*string != 0) { | |
| 60 if (max_string_len == 0) { | |
| 61 return '?'; | |
| 62 } | |
| 63 if (*string++ == c) { | |
| 64 if (*string == ':') { | |
| 65 return GETOPT_FOUND_WITH_ARGUMENT; | |
| 66 } else { | |
| 67 return GETOPT_FOUND_WITHOUT_ARGUMENT; | |
| 68 } | |
| 69 } | |
| 70 } | |
| 71 return GETOPT_NOT_FOUND; | |
| 72 } | |
| 73 | |
| 74 int | |
| 75 getopt_s(int argc, | |
| 76 char * const argv[], | |
| 77 const char *optstring) { | |
| 78 | |
| 79 | |
| 80 while (optind_s + 1 < argc) { | |
| 81 char *string; | |
| 82 | |
| 83 /* move 'string' on to next argument */ | |
| 84 optind_s++; | |
| 85 string = argv[optind_s]; | |
| 86 | |
| 87 if (string == NULL) | |
| 88 return '?'; /* NULL argument string */ | |
| 89 | |
| 90 if (string[0] != '-') | |
| 91 return -1; /* found an unexpected character */ | |
| 92 | |
| 93 switch(getopt_check_character(string[1], optstring)) { | |
| 94 case GETOPT_FOUND_WITH_ARGUMENT: | |
| 95 if (optind_s + 1 < argc) { | |
| 96 optind_s++; | |
| 97 optarg_s = argv[optind_s]; | |
| 98 return string[1]; | |
| 99 } else { | |
| 100 return '?'; /* argument missing */ | |
| 101 } | |
| 102 case GETOPT_FOUND_WITHOUT_ARGUMENT: | |
| 103 return string[1]; | |
| 104 case GETOPT_NOT_FOUND: | |
| 105 default: | |
| 106 return '?'; /* didn't find expected character */ | |
| 107 break; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 return -1; | |
| 112 } | |
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Chromium Code Reviews
Issue 2344973002:
Update libsrtp to version 2.0 (Closed)
