1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22 #include "tool_setup.h"
23
24 #ifdef CURL_DOES_CONVERSIONS
25
26 #ifdef HAVE_ICONV
27 # include <iconv.h>
28 #endif
29
30 #include "tool_convert.h"
31
32 #include "memdebug.h" /* keep this as LAST include */
33
34 #ifdef HAVE_ICONV
35
36 /* curl tool iconv conversion descriptors */
37 static iconv_t inbound_cd = (iconv_t)-1;
38 static iconv_t outbound_cd = (iconv_t)-1;
39
40 /* set default codesets for iconv */
41 #ifndef CURL_ICONV_CODESET_OF_NETWORK
42 # define CURL_ICONV_CODESET_OF_NETWORK "ISO8859-1"
43 #endif
44
45 /*
46 * convert_to_network() is a curl tool function to convert
47 * from the host encoding to ASCII on non-ASCII platforms.
48 */
convert_to_network(char * buffer,size_t length)49 CURLcode convert_to_network(char *buffer, size_t length)
50 {
51 /* translate from the host encoding to the network encoding */
52 char *input_ptr, *output_ptr;
53 size_t res, in_bytes, out_bytes;
54
55 /* open an iconv conversion descriptor if necessary */
56 if(outbound_cd == (iconv_t)-1) {
57 outbound_cd = iconv_open(CURL_ICONV_CODESET_OF_NETWORK,
58 CURL_ICONV_CODESET_OF_HOST);
59 if(outbound_cd == (iconv_t)-1) {
60 return CURLE_CONV_FAILED;
61 }
62 }
63 /* call iconv */
64 input_ptr = output_ptr = buffer;
65 in_bytes = out_bytes = length;
66 res = iconv(outbound_cd, &input_ptr, &in_bytes,
67 &output_ptr, &out_bytes);
68 if((res == (size_t)-1) || (in_bytes != 0)) {
69 return CURLE_CONV_FAILED;
70 }
71
72 return CURLE_OK;
73 }
74
75 /*
76 * convert_from_network() is a curl tool function
77 * for performing ASCII conversions on non-ASCII platforms.
78 */
convert_from_network(char * buffer,size_t length)79 CURLcode convert_from_network(char *buffer, size_t length)
80 {
81 /* translate from the network encoding to the host encoding */
82 char *input_ptr, *output_ptr;
83 size_t res, in_bytes, out_bytes;
84
85 /* open an iconv conversion descriptor if necessary */
86 if(inbound_cd == (iconv_t)-1) {
87 inbound_cd = iconv_open(CURL_ICONV_CODESET_OF_HOST,
88 CURL_ICONV_CODESET_OF_NETWORK);
89 if(inbound_cd == (iconv_t)-1) {
90 return CURLE_CONV_FAILED;
91 }
92 }
93 /* call iconv */
94 input_ptr = output_ptr = buffer;
95 in_bytes = out_bytes = length;
96 res = iconv(inbound_cd, &input_ptr, &in_bytes,
97 &output_ptr, &out_bytes);
98 if((res == (size_t)-1) || (in_bytes != 0)) {
99 return CURLE_CONV_FAILED;
100 }
101
102 return CURLE_OK;
103 }
104
convert_cleanup(void)105 void convert_cleanup(void)
106 {
107 /* close iconv conversion descriptors */
108 if(inbound_cd != (iconv_t)-1)
109 (void)iconv_close(inbound_cd);
110 if(outbound_cd != (iconv_t)-1)
111 (void)iconv_close(outbound_cd);
112 }
113
114 #endif /* HAVE_ICONV */
115
convert_char(curl_infotype infotype,char this_char)116 char convert_char(curl_infotype infotype, char this_char)
117 {
118 /* determine how this specific character should be displayed */
119 switch(infotype) {
120 case CURLINFO_DATA_IN:
121 case CURLINFO_DATA_OUT:
122 case CURLINFO_SSL_DATA_IN:
123 case CURLINFO_SSL_DATA_OUT:
124 /* data, treat as ASCII */
125 if(this_char < 0x20 || this_char >= 0x7f) {
126 /* non-printable ASCII, use a replacement character */
127 return UNPRINTABLE_CHAR;
128 }
129 /* printable ASCII hex value: convert to host encoding */
130 (void)convert_from_network(&this_char, 1);
131 /* FALLTHROUGH */
132 default:
133 /* treat as host encoding */
134 if(ISPRINT(this_char)
135 && (this_char != '\t')
136 && (this_char != '\r')
137 && (this_char != '\n')) {
138 /* printable characters excluding tabs and line end characters */
139 return this_char;
140 }
141 break;
142 }
143 /* non-printable, use a replacement character */
144 return UNPRINTABLE_CHAR;
145 }
146
147 #endif /* CURL_DOES_CONVERSIONS */
148