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c88e9e57ef
lyx_mirror/3rdparty/libiconv/1.15/lib/iconv.c
Uwe Stöhr c88e9e57ef libiconv: upgrade to version 1.15
2017-09-12 23:15:43 +02:00

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/*
* Copyright (C) 1999-2008, 2011, 2016 Free Software Foundation, Inc.
* This file is part of the GNU LIBICONV Library.
*
* The GNU LIBICONV Library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* The GNU LIBICONV Library is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <iconv.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "localcharset.h"
#ifdef __CYGWIN__
#include <cygwin/version.h>
#endif
#if ENABLE_EXTRA
/*
* Consider all system dependent encodings, for any system,
* and the extra encodings.
*/
#define USE_AIX
#define USE_OSF1
#define USE_DOS
#define USE_EXTRA
#else
/*
* Consider those system dependent encodings that are needed for the
* current system.
*/
#ifdef _AIX
#define USE_AIX
#endif
#if defined(__osf__) || defined(VMS)
#define USE_OSF1
#endif
#if defined(__DJGPP__) || (defined(_WIN32) && (defined(_MSC_VER) || defined(__MINGW32__)))
#define USE_DOS
#endif
#endif
/*
* Data type for general conversion loop.
*/
struct loop_funcs {
size_t (*loop_convert) (iconv_t icd,
const char* * inbuf, size_t *inbytesleft,
char* * outbuf, size_t *outbytesleft);
size_t (*loop_reset) (iconv_t icd,
char* * outbuf, size_t *outbytesleft);
};
/*
* Converters.
*/
#include "converters.h"
/*
* Transliteration tables.
*/
#include "cjk_variants.h"
#include "translit.h"
/*
* Table of all supported encodings.
*/
struct encoding {
struct mbtowc_funcs ifuncs; /* conversion multibyte -> unicode */
struct wctomb_funcs ofuncs; /* conversion unicode -> multibyte */
int oflags; /* flags for unicode -> multibyte conversion */
};
#define DEFALIAS(xxx_alias,xxx) /* nothing */
enum {
#define DEFENCODING(xxx_names,xxx,xxx_ifuncs1,xxx_ifuncs2,xxx_ofuncs1,xxx_ofuncs2) \
ei_##xxx ,
#include "encodings.def"
#ifdef USE_AIX
# include "encodings_aix.def"
#endif
#ifdef USE_OSF1
# include "encodings_osf1.def"
#endif
#ifdef USE_DOS
# include "encodings_dos.def"
#endif
#ifdef USE_EXTRA
# include "encodings_extra.def"
#endif
#include "encodings_local.def"
#undef DEFENCODING
ei_for_broken_compilers_that_dont_like_trailing_commas
};
#include "flags.h"
static struct encoding const all_encodings[] = {
#define DEFENCODING(xxx_names,xxx,xxx_ifuncs1,xxx_ifuncs2,xxx_ofuncs1,xxx_ofuncs2) \
{ xxx_ifuncs1,xxx_ifuncs2, xxx_ofuncs1,xxx_ofuncs2, ei_##xxx##_oflags },
#include "encodings.def"
#ifdef USE_AIX
# include "encodings_aix.def"
#endif
#ifdef USE_OSF1
# include "encodings_osf1.def"
#endif
#ifdef USE_DOS
# include "encodings_dos.def"
#endif
#ifdef USE_EXTRA
# include "encodings_extra.def"
#endif
#undef DEFENCODING
#define DEFENCODING(xxx_names,xxx,xxx_ifuncs1,xxx_ifuncs2,xxx_ofuncs1,xxx_ofuncs2) \
{ xxx_ifuncs1,xxx_ifuncs2, xxx_ofuncs1,xxx_ofuncs2, 0 },
#include "encodings_local.def"
#undef DEFENCODING
};
#undef DEFALIAS
/*
* Conversion loops.
*/
#include "loops.h"
/*
* Alias lookup function.
* Defines
* struct alias { int name; unsigned int encoding_index; };
* const struct alias * aliases_lookup (const char *str, unsigned int len);
* #define MAX_WORD_LENGTH ...
*/
#if defined _AIX
# include "aliases_sysaix.h"
#elif defined hpux || defined __hpux
# include "aliases_syshpux.h"
#elif defined __osf__
# include "aliases_sysosf1.h"
#elif defined __sun
# include "aliases_syssolaris.h"
#else
# include "aliases.h"
#endif
/*
* System dependent alias lookup function.
* Defines
* const struct alias * aliases2_lookup (const char *str);
*/
#if defined(USE_AIX) || defined(USE_OSF1) || defined(USE_DOS) || defined(USE_EXTRA) /* || ... */
struct stringpool2_t {
#define S(tag,name,encoding_index) char stringpool_##tag[sizeof(name)];
#include "aliases2.h"
#undef S
};
static const struct stringpool2_t stringpool2_contents = {
#define S(tag,name,encoding_index) name,
#include "aliases2.h"
#undef S
};
#define stringpool2 ((const char *) &stringpool2_contents)
static const struct alias sysdep_aliases[] = {
#define S(tag,name,encoding_index) { (int)(long)&((struct stringpool2_t *)0)->stringpool_##tag, encoding_index },
#include "aliases2.h"
#undef S
};
#ifdef __GNUC__
__inline
#else
#ifdef __cplusplus
inline
#endif
#endif
static const struct alias *
aliases2_lookup (register const char *str)
{
const struct alias * ptr;
unsigned int count;
for (ptr = sysdep_aliases, count = sizeof(sysdep_aliases)/sizeof(sysdep_aliases[0]); count > 0; ptr++, count--)
if (!strcmp(str, stringpool2 + ptr->name))
return ptr;
return NULL;
}
#else
#define aliases2_lookup(str) NULL
#define stringpool2 NULL
#endif
#if 0
/* Like !strcasecmp, except that the both strings can be assumed to be ASCII
and the first string can be assumed to be in uppercase. */
static int strequal (const char* str1, const char* str2)
{
unsigned char c1;
unsigned char c2;
for (;;) {
c1 = * (unsigned char *) str1++;
c2 = * (unsigned char *) str2++;
if (c1 == 0)
break;
if (c2 >= 'a' && c2 <= 'z')
c2 -= 'a'-'A';
if (c1 != c2)
break;
}
return (c1 == c2);
}
#endif
iconv_t iconv_open (const char* tocode, const char* fromcode)
{
struct conv_struct * cd;
unsigned int from_index;
int from_wchar;
unsigned int to_index;
int to_wchar;
int transliterate;
int discard_ilseq;
#include "iconv_open1.h"
cd = (struct conv_struct *) malloc(from_wchar != to_wchar
? sizeof(struct wchar_conv_struct)
: sizeof(struct conv_struct));
if (cd == NULL) {
errno = ENOMEM;
return (iconv_t)(-1);
}
#include "iconv_open2.h"
return (iconv_t)cd;
invalid:
errno = EINVAL;
return (iconv_t)(-1);
}
size_t iconv (iconv_t icd,
ICONV_CONST char* * inbuf, size_t *inbytesleft,
char* * outbuf, size_t *outbytesleft)
{
conv_t cd = (conv_t) icd;
if (inbuf == NULL || *inbuf == NULL)
return cd->lfuncs.loop_reset(icd,outbuf,outbytesleft);
else
return cd->lfuncs.loop_convert(icd,
(const char* *)inbuf,inbytesleft,
outbuf,outbytesleft);
}
int iconv_close (iconv_t icd)
{
conv_t cd = (conv_t) icd;
free(cd);
return 0;
}
#ifndef LIBICONV_PLUG
/*
* Verify that a 'struct conv_struct' and a 'struct wchar_conv_struct' each
* fit in an iconv_allocation_t.
* If this verification fails, iconv_allocation_t must be made larger and
* the major version in LIBICONV_VERSION_INFO must be bumped.
* Currently 'struct conv_struct' has 21 integer/pointer fields, and
* 'struct wchar_conv_struct' additionally has an 'mbstate_t' field.
*/
typedef int verify_size_1[2 * (sizeof (struct conv_struct) <= sizeof (iconv_allocation_t)) - 1];
typedef int verify_size_2[2 * (sizeof (struct wchar_conv_struct) <= sizeof (iconv_allocation_t)) - 1];
int iconv_open_into (const char* tocode, const char* fromcode,
iconv_allocation_t* resultp)
{
struct conv_struct * cd;
unsigned int from_index;
int from_wchar;
unsigned int to_index;
int to_wchar;
int transliterate;
int discard_ilseq;
#include "iconv_open1.h"
cd = (struct conv_struct *) resultp;
#include "iconv_open2.h"
return 0;
invalid:
errno = EINVAL;
return -1;
}
int iconvctl (iconv_t icd, int request, void* argument)
{
conv_t cd = (conv_t) icd;
switch (request) {
case ICONV_TRIVIALP:
*(int *)argument =
((cd->lfuncs.loop_convert == unicode_loop_convert
&& cd->iindex == cd->oindex)
|| cd->lfuncs.loop_convert == wchar_id_loop_convert
? 1 : 0);
return 0;
case ICONV_GET_TRANSLITERATE:
*(int *)argument = cd->transliterate;
return 0;
case ICONV_SET_TRANSLITERATE:
cd->transliterate = (*(const int *)argument ? 1 : 0);
return 0;
case ICONV_GET_DISCARD_ILSEQ:
*(int *)argument = cd->discard_ilseq;
return 0;
case ICONV_SET_DISCARD_ILSEQ:
cd->discard_ilseq = (*(const int *)argument ? 1 : 0);
return 0;
case ICONV_SET_HOOKS:
if (argument != NULL) {
cd->hooks = *(const struct iconv_hooks *)argument;
} else {
cd->hooks.uc_hook = NULL;
cd->hooks.wc_hook = NULL;
cd->hooks.data = NULL;
}
return 0;
case ICONV_SET_FALLBACKS:
if (argument != NULL) {
cd->fallbacks = *(const struct iconv_fallbacks *)argument;
} else {
cd->fallbacks.mb_to_uc_fallback = NULL;
cd->fallbacks.uc_to_mb_fallback = NULL;
cd->fallbacks.mb_to_wc_fallback = NULL;
cd->fallbacks.wc_to_mb_fallback = NULL;
cd->fallbacks.data = NULL;
}
return 0;
default:
errno = EINVAL;
return -1;
}
}
/* An alias after its name has been converted from 'int' to 'const char*'. */
struct nalias { const char* name; unsigned int encoding_index; };
static int compare_by_index (const void * arg1, const void * arg2)
{
const struct nalias * alias1 = (const struct nalias *) arg1;
const struct nalias * alias2 = (const struct nalias *) arg2;
return (int)alias1->encoding_index - (int)alias2->encoding_index;
}
static int compare_by_name (const void * arg1, const void * arg2)
{
const char * name1 = *(const char **)arg1;
const char * name2 = *(const char **)arg2;
/* Compare alphabetically, but put "CS" names at the end. */
int sign = strcmp(name1,name2);
if (sign != 0) {
sign = ((name1[0]=='C' && name1[1]=='S') - (name2[0]=='C' && name2[1]=='S'))
* 4 + (sign >= 0 ? 1 : -1);
}
return sign;
}
void iconvlist (int (*do_one) (unsigned int namescount,
const char * const * names,
void* data),
void* data)
{
#define aliascount1 sizeof(aliases)/sizeof(aliases[0])
#ifndef aliases2_lookup
#define aliascount2 sizeof(sysdep_aliases)/sizeof(sysdep_aliases[0])
#else
#define aliascount2 0
#endif
#define aliascount (aliascount1+aliascount2)
struct nalias aliasbuf[aliascount];
const char * namesbuf[aliascount];
size_t num_aliases;
{
/* Put all existing aliases into a buffer. */
size_t i;
size_t j;
j = 0;
for (i = 0; i < aliascount1; i++) {
const struct alias * p = &aliases[i];
if (p->name >= 0
&& p->encoding_index != ei_local_char
&& p->encoding_index != ei_local_wchar_t) {
aliasbuf[j].name = stringpool + p->name;
aliasbuf[j].encoding_index = p->encoding_index;
j++;
}
}
#ifndef aliases2_lookup
for (i = 0; i < aliascount2; i++) {
aliasbuf[j].name = stringpool2 + sysdep_aliases[i].name;
aliasbuf[j].encoding_index = sysdep_aliases[i].encoding_index;
j++;
}
#endif
num_aliases = j;
}
/* Sort by encoding_index. */
if (num_aliases > 1)
qsort(aliasbuf, num_aliases, sizeof(struct nalias), compare_by_index);
{
/* Process all aliases with the same encoding_index together. */
size_t j;
j = 0;
while (j < num_aliases) {
unsigned int ei = aliasbuf[j].encoding_index;
size_t i = 0;
do
namesbuf[i++] = aliasbuf[j++].name;
while (j < num_aliases && aliasbuf[j].encoding_index == ei);
if (i > 1)
qsort(namesbuf, i, sizeof(const char *), compare_by_name);
/* Call the callback. */
if (do_one(i,namesbuf,data))
break;
}
}
#undef aliascount
#undef aliascount2
#undef aliascount1
}
/*
* Table of canonical names of encodings.
* Instead of strings, it contains offsets into stringpool and stringpool2.
*/
static const unsigned short all_canonical[] = {
#if defined _AIX
# include "canonical_sysaix.h"
#elif defined hpux || defined __hpux
# include "canonical_syshpux.h"
#elif defined __osf__
# include "canonical_sysosf1.h"
#elif defined __sun
# include "canonical_syssolaris.h"
#else
# include "canonical.h"
#endif
#ifdef USE_AIX
# if defined _AIX
# include "canonical_aix_sysaix.h"
# else
# include "canonical_aix.h"
# endif
#endif
#ifdef USE_OSF1
# if defined __osf__
# include "canonical_osf1_sysosf1.h"
# else
# include "canonical_osf1.h"
# endif
#endif
#ifdef USE_DOS
# include "canonical_dos.h"
#endif
#ifdef USE_EXTRA
# include "canonical_extra.h"
#endif
#if defined _AIX
# include "canonical_local_sysaix.h"
#elif defined hpux || defined __hpux
# include "canonical_local_syshpux.h"
#elif defined __osf__
# include "canonical_local_sysosf1.h"
#elif defined __sun
# include "canonical_local_syssolaris.h"
#else
# include "canonical_local.h"
#endif
};
const char * iconv_canonicalize (const char * name)
{
const char* code;
char buf[MAX_WORD_LENGTH+10+1];
const char* cp;
char* bp;
const struct alias * ap;
unsigned int count;
unsigned int index;
const char* pool;
/* Before calling aliases_lookup, convert the input string to upper case,
* and check whether it's entirely ASCII (we call gperf with option "-7"
* to achieve a smaller table) and non-empty. If it's not entirely ASCII,
* or if it's too long, it is not a valid encoding name.
*/
for (code = name;;) {
/* Search code in the table. */
for (cp = code, bp = buf, count = MAX_WORD_LENGTH+10+1; ; cp++, bp++) {
unsigned char c = * (unsigned char *) cp;
if (c >= 0x80)
goto invalid;
if (c >= 'a' && c <= 'z')
c -= 'a'-'A';
*bp = c;
if (c == '\0')
break;
if (--count == 0)
goto invalid;
}
for (;;) {
if (bp-buf >= 10 && memcmp(bp-10,"//TRANSLIT",10)==0) {
bp -= 10;
*bp = '\0';
continue;
}
if (bp-buf >= 8 && memcmp(bp-8,"//IGNORE",8)==0) {
bp -= 8;
*bp = '\0';
continue;
}
break;
}
if (buf[0] == '\0') {
code = locale_charset();
/* Avoid an endless loop that could occur when using an older version
of localcharset.c. */
if (code[0] == '\0')
goto invalid;
continue;
}
pool = stringpool;
ap = aliases_lookup(buf,bp-buf);
if (ap == NULL) {
pool = stringpool2;
ap = aliases2_lookup(buf);
if (ap == NULL)
goto invalid;
}
if (ap->encoding_index == ei_local_char) {
code = locale_charset();
/* Avoid an endless loop that could occur when using an older version
of localcharset.c. */
if (code[0] == '\0')
goto invalid;
continue;
}
if (ap->encoding_index == ei_local_wchar_t) {
/* On systems which define __STDC_ISO_10646__, wchar_t is Unicode.
This is also the case on native Woe32 systems and Cygwin >= 1.7, where
we know that it is UTF-16. */
#if ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) || (defined __CYGWIN__ && CYGWIN_VERSION_DLL_MAJOR >= 1007)
if (sizeof(wchar_t) == 4) {
index = ei_ucs4internal;
break;
}
if (sizeof(wchar_t) == 2) {
# if WORDS_LITTLEENDIAN
index = ei_utf16le;
# else
index = ei_utf16be;
# endif
break;
}
#elif __STDC_ISO_10646__
if (sizeof(wchar_t) == 4) {
index = ei_ucs4internal;
break;
}
if (sizeof(wchar_t) == 2) {
index = ei_ucs2internal;
break;
}
if (sizeof(wchar_t) == 1) {
index = ei_iso8859_1;
break;
}
#endif
}
index = ap->encoding_index;
break;
}
return all_canonical[index] + pool;
invalid:
return name;
}
int _libiconv_version = _LIBICONV_VERSION;
#if defined __FreeBSD__ && !defined __gnu_freebsd__
/* GNU libiconv is the native FreeBSD iconv implementation since 2002.
It wants to define the symbols 'iconv_open', 'iconv', 'iconv_close'. */
#define strong_alias(name, aliasname) _strong_alias(name, aliasname)
#define _strong_alias(name, aliasname) \
extern __typeof (name) aliasname __attribute__ ((alias (#name)));
#undef iconv_open
#undef iconv
#undef iconv_close
strong_alias (libiconv_open, iconv_open)
strong_alias (libiconv, iconv)
strong_alias (libiconv_close, iconv_close)
#endif
#endif
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