1 /*
2 This file is part of libXMLRPC - a C library for xml-encoded function calls.
3
4 Author: Dan Libby (dan@libby.com)
5 Epinions.com may be contacted at feedback@epinions-inc.com
6 */
7
8 /*
9 Copyright 2000 Epinions, Inc.
10
11 Subject to the following 3 conditions, Epinions, Inc. permits you, free
12 of charge, to (a) use, copy, distribute, modify, perform and display this
13 software and associated documentation files (the "Software"), and (b)
14 permit others to whom the Software is furnished to do so as well.
15
16 1) The above copyright notice and this permission notice shall be included
17 without modification in all copies or substantial portions of the
18 Software.
19
20 2) THE SOFTWARE IS PROVIDED "AS IS", WITHOUT ANY WARRANTY OR CONDITION OF
21 ANY KIND, EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION ANY
22 IMPLIED WARRANTIES OF ACCURACY, MERCHANTABILITY, FITNESS FOR A PARTICULAR
23 PURPOSE OR NONINFRINGEMENT.
24
25 3) IN NO EVENT SHALL EPINIONS, INC. BE LIABLE FOR ANY DIRECT, INDIRECT,
26 SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOST PROFITS ARISING OUT
27 OF OR IN CONNECTION WITH THE SOFTWARE (HOWEVER ARISING, INCLUDING
28 NEGLIGENCE), EVEN IF EPINIONS, INC. IS AWARE OF THE POSSIBILITY OF SUCH
29 DAMAGES.
30
31 */
32
33 #include <php.h>
34
35 #include <errno.h>
36 #include <string.h>
37
38 #ifdef HAVE_GICONV_H
39 #include <giconv.h>
40 #else
41 #include <iconv.h>
42 #endif
43
44 #include "encodings.h"
45
46 #ifndef ICONV_CSNMAXLEN
47 #define ICONV_CSNMAXLEN 64
48 #endif
49
convert(const char * src,int src_len,int * new_len,const char * from_enc,const char * to_enc)50 static char* convert(const char* src, int src_len, int *new_len, const char* from_enc, const char* to_enc) {
51 char* outbuf = 0;
52
53 if(src && src_len && from_enc && to_enc) {
54 size_t outlenleft = src_len;
55 size_t inlenleft = src_len;
56 int outlen = src_len;
57 iconv_t ic;
58 char* out_ptr = 0;
59
60 if(strlen(to_enc) >= ICONV_CSNMAXLEN || strlen(from_enc) >= ICONV_CSNMAXLEN) {
61 return NULL;
62 }
63 ic = iconv_open(to_enc, from_enc);
64 if(ic != (iconv_t)-1) {
65 size_t st;
66 outbuf = (char*)emalloc(outlen + 1);
67
68 out_ptr = (char*)outbuf;
69 while(inlenleft) {
70 st = iconv(ic, (char**)&src, &inlenleft, &out_ptr, &outlenleft);
71 if(st == -1) {
72 if(errno == E2BIG) {
73 int diff = out_ptr - outbuf;
74 outlen += inlenleft;
75 outlenleft += inlenleft;
76 outbuf = (char*)erealloc(outbuf, outlen + 1);
77 out_ptr = outbuf + diff;
78 }
79 else {
80 efree(outbuf);
81 outbuf = 0;
82 break;
83 }
84 }
85 }
86 iconv_close(ic);
87 }
88 outlen -= outlenleft;
89
90 if(new_len) {
91 *new_len = outbuf ? outlen : 0;
92 }
93 if(outbuf) {
94 outbuf[outlen] = 0;
95 }
96 }
97 return outbuf;
98 }
99
100 /* returns a new string that must be freed */
utf8_encode(const char * s,int len,int * newlen,const char * encoding)101 char* utf8_encode(const char *s, int len, int *newlen, const char* encoding)
102 {
103 return convert(s, len, newlen, encoding, "UTF-8");
104 }
105
106 /* returns a new string, possibly decoded */
utf8_decode(const char * s,int len,int * newlen,const char * encoding)107 char* utf8_decode(const char *s, int len, int *newlen, const char* encoding)
108 {
109 return convert(s, len, newlen, "UTF-8", encoding);
110 }
111
