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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdlib/] [getsubopt.c] - Rev 158
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/*- * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)getsubopt.c 8.1 (Berkeley) 6/4/93"; #endif /* LIBC_SCCS and not lint */ #include <sys/cdefs.h> #include <unistd.h> #include <stdlib.h> #include <string.h> /* * The SVID interface to getsubopt provides no way of figuring out which * part of the suboptions list wasn't matched. This makes error messages * tricky... The extern variable suboptarg is a pointer to the token * which didn't match. */ char *suboptarg; int getsubopt(optionp, tokens, valuep) char **optionp, **valuep; char * const *tokens; { int cnt; char *p; suboptarg = *valuep = NULL; if (!optionp || !*optionp) return(-1); /* skip leading white-space, commas */ for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); if (!*p) { *optionp = p; return(-1); } /* save the start of the token, and skip the rest of the token. */ for (suboptarg = p; *++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';); if (*p) { /* * If there's an equals sign, set the value pointer, and * skip over the value part of the token. Terminate the * token. */ if (*p == '=') { *p = '\0'; for (*valuep = ++p; *p && *p != ',' && *p != ' ' && *p != '\t'; ++p); if (*p) *p++ = '\0'; } else *p++ = '\0'; /* Skip any whitespace or commas after this token. */ for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p); } /* set optionp for next round. */ *optionp = p; for (cnt = 0; *tokens; ++tokens, ++cnt) if (!strcmp(suboptarg, *tokens)) return(cnt); return(-1); }