From e7803f7520bd591c37557ffd853dd40541854357 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Wed, 9 Aug 2006 13:01:38 +0000 Subject: Maple Worksheet repository CGI frontend --- math/query.c | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 math/query.c (limited to 'math/query.c') diff --git a/math/query.c b/math/query.c new file mode 100644 index 0000000..c275547 --- /dev/null +++ b/math/query.c @@ -0,0 +1,81 @@ +/* $Id$ */ + +/* + * Copyright (c) 2006 Dimitri A. Sokolyuk + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include +#include +#include +#include + +#include "query.h" + +char * +decode(const char *s) +{ + char *buf, *t; + + assert(s); + buf = malloc(sizeof(char) * strlen(s) + 1); + assert(buf); + + for (t = buf; *s != '\0'; ++t, ++s) { + if (*s == '%') { + *t = *++s; + *t -= isdigit(*s) ? '0' : ((isupper(*s) ? 'A' : 'a') - 0x0a); + *t *= 0x10; + *t += *++s; + *t -= isdigit(*s) ? '0' : ((isupper(*s) ? 'A' : 'a') - 0x0a); + } else if (*s == '+') + *t = ' '; + else + *t = *s; + } + *t = '\0'; + + return buf; +} + +char * +getquery(char *var) +{ + const char *qstr; + char *buf, *s, *p; + + assert(var); + qstr = getenv("QUERY_STRING"); + if (!qstr) + return NULL; + buf = decode(qstr); + + for (s = buf; *s != '\0'; s = p + 1) { + for (p = s; *p && *p != '&'; ++p) + ; + *p = '\0'; + if (strncmp(s, var, strlen(var)) == 0) { + s = strchr(s, '=') + 1; + if (strlen(s) == 0) + break; /* XXX */ + p = strdup(s); + free(buf); + return p; + } + } + + free(buf); + return NULL; +} -- cgit v1.2.3