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authorUlrich Drepper <drepper@redhat.com>2001-04-12 20:26:40 +0000
committerUlrich Drepper <drepper@redhat.com>2001-04-12 20:26:40 +0000
commitb721a2c03c079f8939fae82823b6f75ef5b6639b (patch)
treecf46fabfc0a8aabeeb23a13c2eeb4b862fda99d0 /iconvdata/utf-32.c
parent9dd7309ceee055ed98039f29982dc773bfc63bef (diff)
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Update.
2001-04-12 Bruno Haible <haible@clisp.cons.org> * iconvdata/TESTS2: New file. * iconvdata/run-iconv-test.sh: Also run tests from TESTS2. * iconvdata/testdata/alfabeta..UTF-8: New file. * iconvdata/testdata/alfabeta..UTF-16.BE: New file. * iconvdata/testdata/alfabeta..UTF-16.LE: New file. * iconvdata/testdata/alfabeta..UTF-32.BE: New file. * iconvdata/testdata/alfabeta..UTF-32.LE: New file. 2001-04-11 Bruno Haible <haible@clisp.cons.org> * iconvdata/utf-32.c: New file. * iconvdata/gconv-modules: Add entries for UTF-32, UTF-32LE, UTF-32BE. * iconvdata/Makefile (modules): Add UTF-32. (distribute): Add utf-32.c. 2001-04-11 Bruno Haible <haible@clisp.cons.org> * iconvdata/utf-16.c (PREPARE_LOOP): Initialize 'swap' after possibly changing it in the state. After incrementing 'inptr', store it back. * iconvdata/unicode.c (PREPARE_LOOP): After incrementing 'inptr', store it back. 2001-04-11 Bruno Haible <haible@clisp.cons.org> * iconvdata/utf-16.c (gconv_init): Use MAX_NEEDED_FROM, not MIN_NEEDED_FROM.
Diffstat (limited to 'iconvdata/utf-32.c')
-rw-r--r--iconvdata/utf-32.c270
1 files changed, 270 insertions, 0 deletions
diff --git a/iconvdata/utf-32.c b/iconvdata/utf-32.c
new file mode 100644
index 0000000..2e245c9
--- /dev/null
+++ b/iconvdata/utf-32.c
@@ -0,0 +1,270 @@
+/* Conversion module for UTF-32.
+ Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C 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 C 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 C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <byteswap.h>
+#include <dlfcn.h>
+#include <gconv.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* This is the Byte Order Mark character (BOM). */
+#define BOM 0x0000feffu
+/* And in the other byte order. */
+#define BOM_OE 0xfffe0000u
+
+
+/* Definitions used in the body of the `gconv' function. */
+#define FROM_LOOP from_utf32_loop
+#define TO_LOOP to_utf32_loop
+#define DEFINE_INIT 0
+#define DEFINE_FINI 0
+#define MIN_NEEDED_FROM 4
+#define MIN_NEEDED_TO 4
+#define FROM_DIRECTION (dir == from_utf32)
+#define PREPARE_LOOP \
+ enum direction dir = ((struct utf32_data *) step->__data)->dir; \
+ enum variant var = ((struct utf32_data *) step->__data)->var; \
+ int swap; \
+ if (FROM_DIRECTION && var == UTF_32) \
+ { \
+ if (data->__invocation_counter == 0) \
+ { \
+ /* We have to find out which byte order the file is encoded in. */ \
+ if (inptr + 4 > inend) \
+ return __GCONV_EMPTY_INPUT; \
+ \
+ if (get32u (inptr) == BOM) \
+ /* Simply ignore the BOM character. */ \
+ *inptrp = inptr += 4; \
+ else if (get32u (inptr) == BOM_OE) \
+ { \
+ ((struct utf32_data *) step->__data)->swap = 1; \
+ *inptrp = inptr += 4; \
+ } \
+ } \
+ } \
+ else if (!FROM_DIRECTION && var == UTF_32 && !data->__internal_use \
+ && data->__invocation_counter == 0) \
+ { \
+ /* Emit the Byte Order Mark. */ \
+ if (__builtin_expect (outbuf + 4 > outend, 0)) \
+ return __GCONV_FULL_OUTPUT; \
+ \
+ put32u (outbuf, BOM); \
+ outbuf += 4; \
+ } \
+ swap = ((struct utf32_data *) step->__data)->swap;
+#define EXTRA_LOOP_ARGS , var, swap
+
+
+/* Direction of the transformation. */
+enum direction
+{
+ illegal_dir,
+ to_utf32,
+ from_utf32
+};
+
+enum variant
+{
+ illegal_var,
+ UTF_32,
+ UTF_32LE,
+ UTF_32BE
+};
+
+struct utf32_data
+{
+ enum direction dir;
+ enum variant var;
+ int swap;
+};
+
+
+extern int gconv_init (struct __gconv_step *step);
+int
+gconv_init (struct __gconv_step *step)
+{
+ /* Determine which direction. */
+ struct utf32_data *new_data;
+ enum direction dir = illegal_dir;
+ enum variant var = illegal_var;
+ int result;
+
+ if (__strcasecmp (step->__from_name, "UTF-32//") == 0)
+ {
+ dir = from_utf32;
+ var = UTF_32;
+ }
+ else if (__strcasecmp (step->__to_name, "UTF-32//") == 0)
+ {
+ dir = to_utf32;
+ var = UTF_32;
+ }
+ else if (__strcasecmp (step->__from_name, "UTF-32BE//") == 0)
+ {
+ dir = from_utf32;
+ var = UTF_32BE;
+ }
+ else if (__strcasecmp (step->__to_name, "UTF-32BE//") == 0)
+ {
+ dir = to_utf32;
+ var = UTF_32BE;
+ }
+ else if (__strcasecmp (step->__from_name, "UTF-32LE//") == 0)
+ {
+ dir = from_utf32;
+ var = UTF_32LE;
+ }
+ else if (__strcasecmp (step->__to_name, "UTF-32LE//") == 0)
+ {
+ dir = to_utf32;
+ var = UTF_32LE;
+ }
+
+ result = __GCONV_NOCONV;
+ if (__builtin_expect (dir, to_utf32) != illegal_dir)
+ {
+ new_data = (struct utf32_data *) malloc (sizeof (struct utf32_data));
+
+ result = __GCONV_NOMEM;
+ if (new_data != NULL)
+ {
+ new_data->dir = dir;
+ new_data->var = var;
+ new_data->swap = ((var == UTF_32LE && BYTE_ORDER == BIG_ENDIAN)
+ || (var == UTF_32BE
+ && BYTE_ORDER == LITTLE_ENDIAN));
+ step->__data = new_data;
+
+ if (dir == from_utf32)
+ {
+ step->__min_needed_from = MIN_NEEDED_FROM;
+ step->__max_needed_from = MIN_NEEDED_FROM;
+ step->__min_needed_to = MIN_NEEDED_TO;
+ step->__max_needed_to = MIN_NEEDED_TO;
+ }
+ else
+ {
+ step->__min_needed_from = MIN_NEEDED_TO;
+ step->__max_needed_from = MIN_NEEDED_TO;
+ step->__min_needed_to = MIN_NEEDED_FROM;
+ step->__max_needed_to = MIN_NEEDED_FROM;
+ }
+
+ step->__stateful = 0;
+
+ result = __GCONV_OK;
+ }
+ }
+
+ return result;
+}
+
+
+extern void gconv_end (struct __gconv_step *data);
+void
+gconv_end (struct __gconv_step *data)
+{
+ free (data->__data);
+}
+
+
+/* Convert from the internal (UCS4-like) format to UTF-32. */
+#define MIN_NEEDED_INPUT MIN_NEEDED_TO
+#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
+#define LOOPFCT TO_LOOP
+#define BODY \
+ { \
+ uint32_t c = get32 (inptr); \
+ \
+ if (__builtin_expect (c >= 0x110000, 0)) \
+ { \
+ STANDARD_ERR_HANDLER (4); \
+ } \
+ else if (__builtin_expect (c >= 0xd800 && c < 0xe000, 0)) \
+ { \
+ /* Surrogate characters in UCS-4 input are not valid. \
+ We must catch this. If we let surrogates pass through, \
+ attackers could make a security hole exploit by \
+ generating "irregular UTF-32" sequences. */ \
+ if (! ignore_errors_p ()) \
+ { \
+ result = __GCONV_ILLEGAL_INPUT; \
+ break; \
+ } \
+ inptr += 4; \
+ ++*irreversible; \
+ continue; \
+ } \
+ \
+ if (swap) \
+ put32 (outptr, bswap_32 (c)); \
+ else \
+ put32 (outptr, c); \
+ \
+ outptr += 4; \
+ inptr += 4; \
+ }
+#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS \
+ , enum variant var, int swap
+#include <iconv/loop.c>
+
+
+/* Convert from UTF-32 to the internal (UCS4-like) format. */
+#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
+#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
+#define LOOPFCT FROM_LOOP
+#define BODY \
+ { \
+ uint32_t u1 = get32 (inptr); \
+ \
+ if (swap) \
+ u1 = bswap_32 (u1); \
+ \
+ if (__builtin_expect (u1 >= 0x110000, 0)) \
+ { \
+ /* This is illegal. */ \
+ if (! ignore_errors_p ()) \
+ { \
+ /* This is an illegal character. */ \
+ result = __GCONV_ILLEGAL_INPUT; \
+ break; \
+ } \
+ \
+ inptr += 4; \
+ ++*irreversible; \
+ continue; \
+ } \
+ \
+ put32 (outptr, u1); \
+ inptr += 4; \
+ outptr += 4; \
+ }
+#define LOOP_NEED_FLAGS
+#define EXTRA_LOOP_DECLS \
+ , enum variant var, int swap
+#include <iconv/loop.c>
+
+
+/* Now define the toplevel functions. */
+#include <iconv/skeleton.c>