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|
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Kirill Maximov <kir@actimind.com> |
+----------------------------------------------------------------------+
*/
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <errno.h>
#include "php.h"
#include "quot_print.h"
#include <stdio.h>
/*
* Converting HEX char to INT value
*/
static char php_hex2int(int c) /* {{{ */
{
if (isdigit(c)) {
return c - '0';
}
else if (c >= 'A' && c <= 'F') {
return c - 'A' + 10;
}
else if (c >= 'a' && c <= 'f') {
return c - 'a' + 10;
}
else {
return -1;
}
}
/* }}} */
PHPAPI zend_string *php_quot_print_decode(const unsigned char *str, size_t length, int replace_us_by_ws) /* {{{ */
{
register size_t i;
register unsigned const char *p1;
register unsigned char *p2;
register unsigned int h_nbl, l_nbl;
size_t decoded_len, buf_size;
zend_string *retval;
static unsigned int hexval_tbl[256] = {
64, 64, 64, 64, 64, 64, 64, 64, 64, 32, 16, 64, 64, 16, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
32, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 64, 64, 64, 64, 64, 64,
64, 10, 11, 12, 13, 14, 15, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 10, 11, 12, 13, 14, 15, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
};
if (replace_us_by_ws) {
replace_us_by_ws = '_';
}
i = length, p1 = str; buf_size = length;
while (i > 1 && *p1 != '\0') {
if (*p1 == '=') {
buf_size -= 2;
p1++;
i--;
}
p1++;
i--;
}
retval = zend_string_alloc(buf_size, 0);
i = length; p1 = str; p2 = (unsigned char*)ZSTR_VAL(retval);
decoded_len = 0;
while (i > 0 && *p1 != '\0') {
if (*p1 == '=') {
i--, p1++;
if (i == 0 || *p1 == '\0') {
break;
}
h_nbl = hexval_tbl[*p1];
if (h_nbl < 16) {
/* next char should be a hexadecimal digit */
if ((--i) == 0 || (l_nbl = hexval_tbl[*(++p1)]) >= 16) {
efree(retval);
return NULL;
}
*(p2++) = (h_nbl << 4) | l_nbl, decoded_len++;
i--, p1++;
} else if (h_nbl < 64) {
/* soft line break */
while (h_nbl == 32) {
if (--i == 0 || (h_nbl = hexval_tbl[*(++p1)]) == 64) {
efree(retval);
return NULL;
}
}
if (p1[0] == '\r' && i >= 2 && p1[1] == '\n') {
i--, p1++;
}
i--, p1++;
} else {
efree(retval);
return NULL;
}
} else {
*(p2++) = (replace_us_by_ws == *p1 ? '\x20': *p1);
i--, p1++, decoded_len++;
}
}
*p2 = '\0';
ZSTR_LEN(retval) = decoded_len;
return retval;
}
/* }}} */
#define PHP_QPRINT_MAXL 75
PHPAPI zend_string *php_quot_print_encode(const unsigned char *str, size_t length) /* {{{ */
{
zend_ulong lp = 0;
unsigned char c, *d;
char *hex = "0123456789ABCDEF";
zend_string *ret;
ret = zend_string_safe_alloc(3, (length + (((3 * length)/(PHP_QPRINT_MAXL-9)) + 1)), 0, 0);
d = (unsigned char*)ZSTR_VAL(ret);
while (length--) {
if (((c = *str++) == '\015') && (*str == '\012') && length > 0) {
*d++ = '\015';
*d++ = *str++;
length--;
lp = 0;
} else {
if (iscntrl (c) || (c == 0x7f) || (c & 0x80) || (c == '=') || ((c == ' ') && (*str == '\015'))) {
if ((((lp+= 3) > PHP_QPRINT_MAXL) && (c <= 0x7f))
|| ((c > 0x7f) && (c <= 0xdf) && ((lp + 3) > PHP_QPRINT_MAXL))
|| ((c > 0xdf) && (c <= 0xef) && ((lp + 6) > PHP_QPRINT_MAXL))
|| ((c > 0xef) && (c <= 0xf4) && ((lp + 9) > PHP_QPRINT_MAXL))) {
*d++ = '=';
*d++ = '\015';
*d++ = '\012';
lp = 3;
}
*d++ = '=';
*d++ = hex[c >> 4];
*d++ = hex[c & 0xf];
} else {
if ((++lp) > PHP_QPRINT_MAXL) {
*d++ = '=';
*d++ = '\015';
*d++ = '\012';
lp = 1;
}
*d++ = c;
}
}
}
*d = '\0';
ret = zend_string_truncate(ret, d - (unsigned char*)ZSTR_VAL(ret), 0);
return ret;
}
/* }}} */
/*
*
* Decoding Quoted-printable string.
*
*/
/* {{{ Convert a quoted-printable string to an 8 bit string */
PHP_FUNCTION(quoted_printable_decode)
{
zend_string *arg1;
char *str_in;
zend_string *str_out;
size_t i = 0, j = 0, k;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(arg1)
ZEND_PARSE_PARAMETERS_END();
if (ZSTR_LEN(arg1) == 0) {
/* shortcut */
RETURN_EMPTY_STRING();
}
str_in = ZSTR_VAL(arg1);
str_out = zend_string_alloc(ZSTR_LEN(arg1), 0);
while (str_in[i]) {
switch (str_in[i]) {
case '=':
if (str_in[i + 1] && str_in[i + 2] &&
isxdigit((int) str_in[i + 1]) &&
isxdigit((int) str_in[i + 2]))
{
ZSTR_VAL(str_out)[j++] = (php_hex2int((int) str_in[i + 1]) << 4)
+ php_hex2int((int) str_in[i + 2]);
i += 3;
} else /* check for soft line break according to RFC 2045*/ {
k = 1;
while (str_in[i + k] && ((str_in[i + k] == 32) || (str_in[i + k] == 9))) {
/* Possibly, skip spaces/tabs at the end of line */
k++;
}
if (!str_in[i + k]) {
/* End of line reached */
i += k;
}
else if ((str_in[i + k] == 13) && (str_in[i + k + 1] == 10)) {
/* CRLF */
i += k + 2;
}
else if ((str_in[i + k] == 13) || (str_in[i + k] == 10)) {
/* CR or LF */
i += k + 1;
}
else {
ZSTR_VAL(str_out)[j++] = str_in[i++];
}
}
break;
default:
ZSTR_VAL(str_out)[j++] = str_in[i++];
}
}
ZSTR_VAL(str_out)[j] = '\0';
ZSTR_LEN(str_out) = j;
RETVAL_NEW_STR(str_out);
}
/* }}} */
/* {{{ */
PHP_FUNCTION(quoted_printable_encode)
{
zend_string *str;
zend_string *new_str;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STR(str)
ZEND_PARSE_PARAMETERS_END();
if (!ZSTR_LEN(str)) {
RETURN_EMPTY_STRING();
}
new_str = php_quot_print_encode((unsigned char *)ZSTR_VAL(str), ZSTR_LEN(str));
RETURN_STR(new_str);
}
/* }}} */
|
