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/*
+----------------------------------------------------------------------+
| Xdebug |
+----------------------------------------------------------------------+
| Copyright (c) 2002-2013 Derick Rethans |
+----------------------------------------------------------------------+
| This source file is subject to version 1.0 of the Xdebug license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://xdebug.derickrethans.nl/license.php |
| If you did not receive a copy of the Xdebug license and are unable |
| to obtain it through the world-wide-web, please send a note to |
| xdebug@derickrethans.nl so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Derick Rethans <derick@xdebug.org> |
+----------------------------------------------------------------------+
*/

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>

#include "php.h"
#include "ext/standard/php_string.h"

#include "xdebug_mm.h"
#include "xdebug_str.h"

void xdebug_str_add(xdebug_str *xs, char *str, int f)
{
int l = strlen(str);
if (xs->l + l > xs->a - 1) {
xs->d = xdrealloc(xs->d, xs->a + l + XDEBUG_STR_PREALLOC);
xs->a = xs->a + l + XDEBUG_STR_PREALLOC;
}
if (!xs->l) {
xs->d[0] = '\0';
}
memcpy(xs->d + xs->l, str, l);
xs->d[xs->l + l] = '\0';
xs->l = xs->l + l;
if (f) {
xdfree(str);
}
}

void xdebug_str_addl(xdebug_str *xs, char *str, int le, int f)
{
if (xs->l + le > xs->a - 1) {
xs->d = xdrealloc(xs->d, xs->a + le + XDEBUG_STR_PREALLOC);
xs->a = xs->a + le + XDEBUG_STR_PREALLOC;
}
if (!xs->l) {
xs->d[0] = '\0';
}
memcpy(xs->d + xs->l, str, le);
xs->d[xs->l + le] = '\0';
xs->l = xs->l + le;

if (f) {
xdfree(str);
}
}

void xdebug_str_chop(xdebug_str *xs, int c)
{
if (c > xs->l) {
/* Do nothing if the chop amount is larger than the buffer size */
} else {
xs->l -= c;
xs->d[xs->l] = '\0';
}
}

void xdebug_str_free(xdebug_str *s)
{
if (s->d) {
xdfree(s->d);
}
}

char *xdebug_sprintf(const char* fmt, ...)
{
char *new_str;
int size = 1;
va_list args;
char *orig_locale;

orig_locale = xdstrdup(setlocale(LC_ALL, NULL));
setlocale(LC_ALL, "C");
new_str = (char *) xdmalloc(size);

for (;;) {
int n;

va_start(args, fmt);
n = vsnprintf(new_str, size, fmt, args);
va_end(args);

if (n > -1 && n < size) {
break;
}
if (n < 0) {
size *= 2;
} else {
size = n + 1;
}
new_str = (char *) xdrealloc(new_str, size);
}
setlocale(LC_ALL, orig_locale);
xdfree(orig_locale);

return new_str;
}

/**
* Duplicate zend_strndup in core to avoid mismatches
* in C-runtime libraries when xdebug and core are built
* with different run-time libraries.
*/
char *xdebug_strndup(const char *s, int length)
{
char *p;

p = (char *) xdmalloc(length + 1);
if (p == NULL) {
return p;
}
if (length) {
memcpy(p, s, length);
}
p[length] = 0;
return p;
}
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