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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 The Apache Software Foundation. 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. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "apr_private.h"
#include "apr_lib.h"
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_STRING_H
#include <string.h>
#endif
#if HAVE_CTYPE_H
#include <ctype.h>
#endif
/*
* Apache's "replacement" for the strncpy() function. We roll our
* own to implement these specific changes:
* (1) strncpy() doesn't always null terminate and we want it to.
* (2) strncpy() null fills, which is bogus, esp. when copy 8byte
* strings into 8k blocks.
* (3) Instead of returning the pointer to the beginning of
* the destination string, we return a pointer to the
* terminating '\0' to allow us to "check" for truncation
*
* ap_cpystrn() follows the same call structure as strncpy().
*/
APR_EXPORT(char *) ap_cpystrn(char *dst, const char *src, size_t dst_size)
{
char *d, *end;
if (dst_size == 0) {
return (dst);
}
d = dst;
end = dst + dst_size - 1;
for (; d < end; ++d, ++src) {
if (!(*d = *src)) {
return (d);
}
}
*d = '\0'; /* always null terminate */
return (d);
}
/*
* This function provides a way to parse a generic argument string
* into a standard argv[] form of argument list. It respects the
* usual "whitespace" and quoteing rules. In the future this could
* be expanded to include support for the ap_call_exec command line
* string processing (including converting '+' to ' ' and doing the
* url processing. It does not currently support this function.
*
* token_context: Context from which pool allocations will occur.
* arg_str: Input argument string for conversion to argv[].
* argv_out: Output location. This is a pointer to an array
* of pointers to strings (ie. &(char *argv[]).
* This value will be allocated from the contexts
* pool and filled in with copies of the tokens
* found during parsing of the arg_str.
*/
APR_EXPORT(ap_status_t) ap_tokenize_to_argv(const char *arg_str,
char ***argv_out,
ap_pool_t *token_context)
{
const char *cp;
const char *tmpCnt;
int isquoted, numargs = 0, rc = APR_SUCCESS;
#define SKIP_WHITESPACE(cp) \
for ( ; *cp == ' ' || *cp == '\t'; ) { \
cp++; \
};
#define CHECK_QUOTATION(cp,isquoted) \
isquoted = 0; \
if (*cp == '"') { \
isquoted = 1; \
cp++; \
}
/* DETERMINE_NEXTSTRING:
* At exit, cp will point to one of the following: NULL, SPACE, TAB or QUOTE.
* NULL implies the argument string has been fully traversed.
*/
#define DETERMINE_NEXTSTRING(cp,isquoted) \
for ( ; *cp != '\0'; cp++) { \
if ( (isquoted && (*cp == ' ' || *cp == '\t')) \
|| (*cp == '\\' && (*(cp+1) == ' ' || *(cp+1) == '\t'))) { \
cp++; \
continue; \
} \
if ( (!isquoted && (*cp == ' ' || *cp == '\t')) \
|| (isquoted && *cp == '"') ) { \
break; \
} \
}
cp = arg_str;
SKIP_WHITESPACE(cp);
tmpCnt = cp;
/* This is ugly and expensive, but if anyone wants to figure a
* way to support any number of args without counting and
* allocating, please go ahead and change the code.
*/
while (*tmpCnt != '\0') {
CHECK_QUOTATION(tmpCnt, isquoted);
DETERMINE_NEXTSTRING(tmpCnt, isquoted);
numargs++;
SKIP_WHITESPACE(tmpCnt);
}
*argv_out = ap_palloc(token_context, numargs*sizeof(char*));
if (*argv_out == NULL) {
return (APR_ENOMEM);
}
/* determine first argument */
numargs = 0;
while (*cp != '\0') {
CHECK_QUOTATION(cp, isquoted);
tmpCnt = cp;
DETERMINE_NEXTSTRING(cp, isquoted);
if (*cp == '\0') {
(*argv_out)[numargs] = ap_pstrdup(token_context, tmpCnt);
numargs++;
(*argv_out)[numargs] = '\0';
break;
}
else {
cp++;
(*argv_out)[numargs] = ap_palloc(token_context, cp - tmpCnt);
ap_cpystrn((*argv_out)[numargs], tmpCnt, cp - tmpCnt);
numargs++;
}
SKIP_WHITESPACE(cp);
}
return(rc);
}
/* Filename_of_pathname returns the final element of the pathname.
* Using the current platform's filename syntax.
* "/foo/bar/gum" -> "gum"
* "/foo/bar/gum/" -> ""
* "gum" -> "gum"
* "wi\\n32\\stuff" -> "stuff
*
* Corrected Win32 to accept "a/b\\stuff", "a:stuff"
*/
const char *ap_filename_of_pathname(const char *pathname)
{
const char path_separator = '/';
const char *s = strrchr(pathname, path_separator);
#ifdef WIN32
const char path_separator_win = '\\';
const char drive_separator_win = ':';
const char *s2 = strrchr(pathname, path_separator_win);
if (s2 > s) s = s2;
if (!s) s = strrchr(pathname, drive_separator_win);
#endif
return s ? ++s : pathname;
}
/* length of dest assumed >= length of src
* collapse in place (src == dest) is legal.
* returns terminating null ptr to dest string.
*/
APR_EXPORT(char *) ap_collapse_spaces(char *dest, const char *src)
{
while (*src) {
if (!ap_isspace(*src))
*dest++ = *src;
++src;
}
*dest = 0;
return (dest);
}
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