Libc-498.tar.gz

[apple/libc.git] / stdlib / getsubopt-fbsd.c

diff --git a/stdlib/getsubopt-fbsd.c b/stdlib/getsubopt-fbsd.c
new file mode 100644 (file)
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--- /dev/null
+++ b/stdlib/getsubopt-fbsd.c
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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>
+__FBSDID("$FreeBSD: src/lib/libc/stdlib/getsubopt.c,v 1.6 2004/02/23 03:30:02 ache Exp $");
+
+#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);
+}