Annotation of mandoc/compat_getsubopt.c, Revision 1.1
1.1 ! kristaps 1: #ifdef HAVE_GETSUBOPT
! 2:
! 3: int dummy;
! 4:
! 5: #else
! 6:
! 7: /* $OpenBSD: getsubopt.c,v 1.4 2005/08/08 08:05:36 espie Exp $ */
! 8:
! 9: /*-
! 10: * Copyright (c) 1990, 1993
! 11: * The Regents of the University of California. All rights reserved.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: */
! 37:
! 38: #include <unistd.h>
! 39: #include <stdlib.h>
! 40: #include <string.h>
! 41:
! 42: /*
! 43: * The SVID interface to getsubopt provides no way of figuring out which
! 44: * part of the suboptions list wasn't matched. This makes error messages
! 45: * tricky... The extern variable suboptarg is a pointer to the token
! 46: * which didn't match.
! 47: */
! 48: char *suboptarg;
! 49:
! 50: int
! 51: getsubopt(char **optionp, char * const *tokens, char **valuep)
! 52: {
! 53: int cnt;
! 54: char *p;
! 55:
! 56: suboptarg = *valuep = NULL;
! 57:
! 58: if (!optionp || !*optionp)
! 59: return(-1);
! 60:
! 61: /* skip leading white-space, commas */
! 62: for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
! 63:
! 64: if (!*p) {
! 65: *optionp = p;
! 66: return(-1);
! 67: }
! 68:
! 69: /* save the start of the token, and skip the rest of the token. */
! 70: for (suboptarg = p;
! 71: *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
! 72:
! 73: if (*p) {
! 74: /*
! 75: * If there's an equals sign, set the value pointer, and
! 76: * skip over the value part of the token. Terminate the
! 77: * token.
! 78: */
! 79: if (*p == '=') {
! 80: *p = '\0';
! 81: for (*valuep = ++p;
! 82: *p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
! 83: if (*p)
! 84: *p++ = '\0';
! 85: } else
! 86: *p++ = '\0';
! 87: /* Skip any whitespace or commas after this token. */
! 88: for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
! 89: }
! 90:
! 91: /* set optionp for next round. */
! 92: *optionp = p;
! 93:
! 94: for (cnt = 0; *tokens; ++tokens, ++cnt)
! 95: if (!strcmp(suboptarg, *tokens))
! 96: return(cnt);
! 97: return(-1);
! 98: }
! 99:
! 100: #endif
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