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/* iksemel (XML parser for Jabber)
** Copyright (C) 2000-2003 Gurer Ozen
** This code is free software; you can redistribute it and/or
** modify it under the terms of GNU Lesser General Public License.
*/
#include "common.h"
#include "iksemel.h"
/***** malloc wrapper *****/
static void *(*my_malloc_func)(size_t size);
static void (*my_free_func)(void *ptr);
void *
iks_malloc (size_t size)
{
if (my_malloc_func)
return my_malloc_func (size);
else
return malloc (size);
}
void
iks_free (void *ptr)
{
if (my_free_func)
my_free_func (ptr);
else
free (ptr);
}
void
iks_set_mem_funcs (void *(*malloc_func)(size_t size), void (*free_func)(void *ptr))
{
my_malloc_func = malloc_func;
my_free_func = free_func;
}
/***** NULL-safe Functions *****/
char *
iks_strdup (const char *src)
{
if (src) return strdup(src);
return NULL;
}
char *
iks_strcat (char *dest, const char *src)
{
size_t len;
if (!src) return dest;
len = strlen (src);
memcpy (dest, src, len);
dest[len] = '\0';
return dest + len;
}
int
iks_strcmp (const char *a, const char *b)
{
if (!a || !b) return -1;
return strcmp (a, b);
}
int
iks_strcasecmp (const char *a, const char *b)
{
if (!a || !b) return -1;
return strcasecmp (a, b);
}
int
iks_strncmp (const char *a, const char *b, size_t n)
{
if (!a || !b) return -1;
return strncmp (a, b, n);
}
int
iks_strncasecmp (const char *a, const char *b, size_t n)
{
if (!a || !b) return -1;
return strncasecmp (a, b, n);
}
size_t
iks_strlen (const char *src)
{
if (!src) return 0;
return strlen (src);
}
/***** XML Escaping *****/
char *
iks_escape (ikstack *s, char *src, size_t len)
{
char *ret;
int i, j, nlen;
if (!src || !s) return NULL;
if (len == -1) len = strlen (src);
nlen = len;
for (i=0; i<len; i++) {
switch (src[i]) {
case '&': nlen += 4; break;
case '<': nlen += 3; break;
case '>': nlen += 3; break;
case '\'': nlen += 5; break;
case '"': nlen += 5; break;
}
}
if (len == nlen) return src;
ret = iks_stack_alloc (s, nlen + 1);
if (!ret) return NULL;
for (i=j=0; i<len; i++) {
switch (src[i]) {
case '&': memcpy (&ret[j], "&", 5); j += 5; break;
case '\'': memcpy (&ret[j], "'", 6); j += 6; break;
case '"': memcpy (&ret[j], """, 6); j += 6; break;
case '<': memcpy (&ret[j], "<", 4); j += 4; break;
case '>': memcpy (&ret[j], ">", 4); j += 4; break;
default: ret[j++] = src[i];
}
}
ret[j] = '\0';
return ret;
}
char *
iks_unescape (ikstack *s, char *src, size_t len)
{
int i,j;
char *ret;
if (!s || !src) return NULL;
if (!strchr (src, '&')) return src;
if (len == -1) len = strlen (src);
ret = iks_stack_alloc (s, len + 1);
if (!ret) return NULL;
for (i=j=0; i<len; i++) {
if (src[i] == '&') {
i++;
if (strncmp (&src[i], "amp;", 4) == 0) {
ret[j] = '&';
i += 3;
} else if (strncmp (&src[i], "quot;", 5) == 0) {
ret[j] = '"';
i += 4;
} else if (strncmp (&src[i], "apos;", 5) == 0) {
ret[j] = '\'';
i += 4;
} else if (strncmp (&src[i], "lt;", 3) == 0) {
ret[j] = '<';
i += 2;
} else if (strncmp (&src[i], "gt;", 3) == 0) {
ret[j] = '>';
i += 2;
} else {
ret[j] = src[--i];
}
} else {
ret[j] = src[i];
}
j++;
}
ret[j] = '\0';
return ret;
}
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