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6973fc01 | 1 | /* Find matching transformation algorithms and initialize steps. |
d614a753 | 2 | Copyright (C) 1997-2020 Free Software Foundation, Inc. |
6973fc01 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
6973fc01 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
6973fc01 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 17 | License along with the GNU C Library; if not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
6973fc01 UD |
19 | |
20 | #include <errno.h> | |
5db91571 | 21 | #include <locale.h> |
e0e86ccb | 22 | #include "../locale/localeinfo.h" |
6973fc01 | 23 | #include <stdlib.h> |
fd19ed3d | 24 | #include <string.h> |
6973fc01 | 25 | |
e62c19f1 UD |
26 | #include <gconv_int.h> |
27 | ||
6973fc01 | 28 | |
335a3b0a AS |
29 | /* How many character should be converted in one call? */ |
30 | #define GCONV_NCHAR_GOAL 8160 | |
31 | ||
32 | ||
6973fc01 | 33 | int |
91927b7c | 34 | __gconv_open (struct gconv_spec *conv_spec, __gconv_t *handle, |
c90a2db6 | 35 | int flags) |
6973fc01 | 36 | { |
d64b6ad0 | 37 | struct __gconv_step *steps; |
6973fc01 | 38 | size_t nsteps; |
d64b6ad0 | 39 | __gconv_t result = NULL; |
6973fc01 UD |
40 | size_t cnt = 0; |
41 | int res; | |
306eeae5 | 42 | int conv_flags = 0; |
ba7b4d29 | 43 | bool translit = false; |
91927b7c | 44 | char *tocode, *fromcode; |
85830c4c | 45 | |
55985355 | 46 | /* Find out whether any error handling method is specified. */ |
91927b7c | 47 | translit = conv_spec->translit; |
85830c4c | 48 | |
91927b7c AS |
49 | if (conv_spec->ignore) |
50 | conv_flags |= __GCONV_IGNORE_ERRORS; | |
55985355 | 51 | |
91927b7c AS |
52 | tocode = conv_spec->tocode; |
53 | fromcode = conv_spec->fromcode; | |
323fb88d | 54 | |
e0e86ccb UD |
55 | /* If the string is empty define this to mean the charset of the |
56 | currently selected locale. */ | |
91927b7c | 57 | if (strcmp (tocode, "//") == 0) |
e0e86ccb UD |
58 | { |
59 | const char *codeset = _NL_CURRENT (LC_CTYPE, CODESET); | |
60 | size_t len = strlen (codeset); | |
61 | char *dest; | |
91927b7c | 62 | tocode = dest = (char *) alloca (len + 3); |
e0e86ccb UD |
63 | memcpy (__mempcpy (dest, codeset, len), "//", 3); |
64 | } | |
91927b7c | 65 | if (strcmp (fromcode, "//") == 0) |
e0e86ccb UD |
66 | { |
67 | const char *codeset = _NL_CURRENT (LC_CTYPE, CODESET); | |
68 | size_t len = strlen (codeset); | |
69 | char *dest; | |
91927b7c | 70 | fromcode = dest = (char *) alloca (len + 3); |
e0e86ccb UD |
71 | memcpy (__mempcpy (dest, codeset, len), "//", 3); |
72 | } | |
73 | ||
91927b7c | 74 | res = __gconv_find_transform (tocode, fromcode, &steps, &nsteps, flags); |
d64b6ad0 | 75 | if (res == __GCONV_OK) |
6973fc01 UD |
76 | { |
77 | /* Allocate room for handle. */ | |
d64b6ad0 UD |
78 | result = (__gconv_t) malloc (sizeof (struct __gconv_info) |
79 | + (nsteps | |
80 | * sizeof (struct __gconv_step_data))); | |
6973fc01 | 81 | if (result == NULL) |
d64b6ad0 | 82 | res = __GCONV_NOMEM; |
6973fc01 UD |
83 | else |
84 | { | |
85 | /* Remember the list of steps. */ | |
d64b6ad0 UD |
86 | result->__steps = steps; |
87 | result->__nsteps = nsteps; | |
6973fc01 | 88 | |
390500b1 | 89 | /* Clear the array for the step data. */ |
d64b6ad0 UD |
90 | memset (result->__data, '\0', |
91 | nsteps * sizeof (struct __gconv_step_data)); | |
6973fc01 | 92 | |
390500b1 | 93 | /* Call all initialization functions for the transformation |
49c091e5 | 94 | step implementations. */ |
405b8c60 | 95 | for (cnt = 0; cnt < nsteps; ++cnt) |
6973fc01 | 96 | { |
0aece08d UD |
97 | size_t size; |
98 | ||
8b682b99 UD |
99 | /* Would have to be done if we would not clear the whole |
100 | array above. */ | |
85830c4c | 101 | #if 0 |
390500b1 | 102 | /* Reset the counter. */ |
d64b6ad0 | 103 | result->__data[cnt].__invocation_counter = 0; |
6973fc01 | 104 | |
390500b1 | 105 | /* It's a regular use. */ |
d64b6ad0 | 106 | result->__data[cnt].__internal_use = 0; |
85830c4c | 107 | #endif |
e3e0a182 | 108 | |
390500b1 | 109 | /* We use the `mbstate_t' member in DATA. */ |
d64b6ad0 | 110 | result->__data[cnt].__statep = &result->__data[cnt].__state; |
e3e0a182 | 111 | |
ba7b4d29 FW |
112 | /* The builtin transliteration handling only |
113 | supports the internal encoding. */ | |
114 | if (translit | |
115 | && __strcasecmp_l (steps[cnt].__from_name, | |
116 | "INTERNAL", _nl_C_locobj_ptr) == 0) | |
117 | conv_flags |= __GCONV_TRANSLIT; | |
0aece08d | 118 | |
405b8c60 UD |
119 | /* If this is the last step we must not allocate an |
120 | output buffer. */ | |
121 | if (cnt < nsteps - 1) | |
d6204268 | 122 | { |
306eeae5 | 123 | result->__data[cnt].__flags = conv_flags; |
d6204268 | 124 | |
405b8c60 UD |
125 | /* Allocate the buffer. */ |
126 | size = (GCONV_NCHAR_GOAL * steps[cnt].__max_needed_to); | |
d6204268 | 127 | |
9cfe5381 | 128 | result->__data[cnt].__outbuf = malloc (size); |
405b8c60 | 129 | if (result->__data[cnt].__outbuf == NULL) |
67aacae6 UD |
130 | { |
131 | res = __GCONV_NOMEM; | |
132 | goto bail; | |
133 | } | |
d6204268 | 134 | |
405b8c60 UD |
135 | result->__data[cnt].__outbufend = |
136 | result->__data[cnt].__outbuf + size; | |
137 | } | |
138 | else | |
139 | { | |
140 | /* Handle the last entry. */ | |
306eeae5 | 141 | result->__data[cnt].__flags = conv_flags | __GCONV_IS_LAST; |
7039a4c9 | 142 | |
d6204268 UD |
143 | break; |
144 | } | |
405b8c60 | 145 | } |
6973fc01 | 146 | } |
6973fc01 | 147 | |
45eca4d1 | 148 | if (res != __GCONV_OK) |
6973fc01 | 149 | { |
45eca4d1 | 150 | /* Something went wrong. Free all the resources. */ |
d6204268 UD |
151 | int serrno; |
152 | bail: | |
153 | serrno = errno; | |
6973fc01 | 154 | |
45eca4d1 UD |
155 | if (result != NULL) |
156 | { | |
157 | while (cnt-- > 0) | |
ba7b4d29 | 158 | free (result->__data[cnt].__outbuf); |
45eca4d1 UD |
159 | |
160 | free (result); | |
161 | result = NULL; | |
162 | } | |
6973fc01 | 163 | |
45eca4d1 | 164 | __gconv_close_transform (steps, nsteps); |
6973fc01 | 165 | |
45eca4d1 UD |
166 | __set_errno (serrno); |
167 | } | |
6973fc01 UD |
168 | } |
169 | ||
170 | *handle = result; | |
171 | return res; | |
172 | } | |
91927b7c | 173 | libc_hidden_def (__gconv_open) |