diff options
Diffstat (limited to 'REORG.TODO/iconvdata/utf-16.c')
| -rw-r--r-- | REORG.TODO/iconvdata/utf-16.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/REORG.TODO/iconvdata/utf-16.c b/REORG.TODO/iconvdata/utf-16.c new file mode 100644 index 0000000000..078f7cfcac --- /dev/null +++ b/REORG.TODO/iconvdata/utf-16.c @@ -0,0 +1,377 @@ +/* Conversion module for UTF-16. + Copyright (C) 1999-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#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 0xfeff +/* And in the other byte order. */ +#define BOM_OE 0xfffe + + +/* Definitions used in the body of the `gconv' function. */ +#define FROM_LOOP from_utf16_loop +#define TO_LOOP to_utf16_loop +#define DEFINE_INIT 0 +#define DEFINE_FINI 0 +#define MIN_NEEDED_FROM 2 +#define MAX_NEEDED_FROM 4 +#define MIN_NEEDED_TO 4 +#define ONE_DIRECTION 0 +#define FROM_DIRECTION (dir == from_utf16) +#define PREPARE_LOOP \ + enum direction dir = ((struct utf16_data *) step->__data)->dir; \ + enum variant var = ((struct utf16_data *) step->__data)->var; \ + if (__glibc_unlikely (data->__invocation_counter == 0)) \ + { \ + if (var == UTF_16) \ + { \ + if (FROM_DIRECTION) \ + { \ + /* We have to find out which byte order the file is \ + encoded in. */ \ + if (inptr + 2 > inend) \ + return (inptr == inend \ + ? __GCONV_EMPTY_INPUT : __GCONV_INCOMPLETE_INPUT); \ + \ + if (get16u (inptr) == BOM) \ + /* Simply ignore the BOM character. */ \ + *inptrp = inptr += 2; \ + else if (get16u (inptr) == BOM_OE) \ + { \ + data->__flags |= __GCONV_SWAP; \ + *inptrp = inptr += 2; \ + } \ + } \ + else if (!FROM_DIRECTION && !data->__internal_use) \ + { \ + /* Emit the Byte Order Mark. */ \ + if (__glibc_unlikely (outbuf + 2 > outend)) \ + return __GCONV_FULL_OUTPUT; \ + \ + put16u (outbuf, BOM); \ + outbuf += 2; \ + } \ + } \ + else if ((var == UTF_16LE && BYTE_ORDER == BIG_ENDIAN) \ + || (var == UTF_16BE && BYTE_ORDER == LITTLE_ENDIAN)) \ + data->__flags |= __GCONV_SWAP; \ + } \ + const int swap = data->__flags & __GCONV_SWAP; +#define EXTRA_LOOP_ARGS , swap + + +/* Direction of the transformation. */ +enum direction +{ + illegal_dir, + to_utf16, + from_utf16 +}; + +enum variant +{ + illegal_var, + UTF_16, + UTF_16LE, + UTF_16BE +}; + +struct utf16_data +{ + enum direction dir; + enum variant var; +}; + + +extern int gconv_init (struct __gconv_step *step); +int +gconv_init (struct __gconv_step *step) +{ + /* Determine which direction. */ + struct utf16_data *new_data; + enum direction dir = illegal_dir; + enum variant var = illegal_var; + int result; + + if (__strcasecmp (step->__from_name, "UTF-16//") == 0) + { + dir = from_utf16; + var = UTF_16; + } + else if (__strcasecmp (step->__to_name, "UTF-16//") == 0) + { + dir = to_utf16; + var = UTF_16; + } + else if (__strcasecmp (step->__from_name, "UTF-16BE//") == 0) + { + dir = from_utf16; + var = UTF_16BE; + } + else if (__strcasecmp (step->__to_name, "UTF-16BE//") == 0) + { + dir = to_utf16; + var = UTF_16BE; + } + else if (__strcasecmp (step->__from_name, "UTF-16LE//") == 0) + { + dir = from_utf16; + var = UTF_16LE; + } + else if (__strcasecmp (step->__to_name, "UTF-16LE//") == 0) + { + dir = to_utf16; + var = UTF_16LE; + } + + result = __GCONV_NOCONV; + if (__builtin_expect (dir, to_utf16) != illegal_dir) + { + new_data = (struct utf16_data *) malloc (sizeof (struct utf16_data)); + + result = __GCONV_NOMEM; + if (new_data != NULL) + { + new_data->dir = dir; + new_data->var = var; + step->__data = new_data; + + if (dir == from_utf16) + { + step->__min_needed_from = MIN_NEEDED_FROM; + step->__max_needed_from = MAX_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 = MAX_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-16. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_TO +#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM +#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM +#define LOOPFCT TO_LOOP +#define BODY \ + { \ + uint32_t c = get32 (inptr); \ + \ + if (__glibc_unlikely (c >= 0xd800 && c < 0xe000)) \ + { \ + /* 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 \ + synthesizing any desired plane 1-16 character. */ \ + result = __GCONV_ILLEGAL_INPUT; \ + if (! ignore_errors_p ()) \ + break; \ + inptr += 4; \ + ++*irreversible; \ + continue; \ + } \ + \ + if (swap) \ + { \ + if (__glibc_unlikely (c >= 0x10000)) \ + { \ + if (__glibc_unlikely (c >= 0x110000)) \ + { \ + STANDARD_TO_LOOP_ERR_HANDLER (4); \ + } \ + \ + /* Generate a surrogate character. */ \ + if (__glibc_unlikely (outptr + 4 > outend)) \ + { \ + /* Overflow in the output buffer. */ \ + result = __GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + put16 (outptr, bswap_16 (0xd7c0 + (c >> 10))); \ + outptr += 2; \ + put16 (outptr, bswap_16 (0xdc00 + (c & 0x3ff))); \ + } \ + else \ + put16 (outptr, bswap_16 (c)); \ + } \ + else \ + { \ + if (__glibc_unlikely (c >= 0x10000)) \ + { \ + if (__glibc_unlikely (c >= 0x110000)) \ + { \ + STANDARD_TO_LOOP_ERR_HANDLER (4); \ + } \ + \ + /* Generate a surrogate character. */ \ + if (__glibc_unlikely (outptr + 4 > outend)) \ + { \ + /* Overflow in the output buffer. */ \ + result = __GCONV_FULL_OUTPUT; \ + break; \ + } \ + \ + put16 (outptr, 0xd7c0 + (c >> 10)); \ + outptr += 2; \ + put16 (outptr, 0xdc00 + (c & 0x3ff)); \ + } \ + else \ + put16 (outptr, c); \ + } \ + outptr += 2; \ + inptr += 4; \ + } +#define LOOP_NEED_FLAGS +#define EXTRA_LOOP_DECLS \ + , int swap +#include <iconv/loop.c> + + +/* Convert from UTF-16 to the internal (UCS4-like) format. */ +#define MIN_NEEDED_INPUT MIN_NEEDED_FROM +#define MAX_NEEDED_INPUT MAX_NEEDED_FROM +#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO +#define LOOPFCT FROM_LOOP +#define BODY \ + { \ + uint16_t u1 = get16 (inptr); \ + \ + if (swap) \ + { \ + u1 = bswap_16 (u1); \ + \ + if (__builtin_expect (u1 < 0xd800, 1) || u1 > 0xdfff) \ + { \ + /* No surrogate. */ \ + put32 (outptr, u1); \ + inptr += 2; \ + } \ + else \ + { \ + uint16_t u2; \ + \ + if (__glibc_unlikely (u1 >= 0xdc00)) \ + { \ + /* This is no valid first word for a surrogate. */ \ + STANDARD_FROM_LOOP_ERR_HANDLER (2); \ + } \ + \ + /* It's a surrogate character. At least the first word says \ + it is. */ \ + if (__glibc_unlikely (inptr + 4 > inend)) \ + { \ + /* We don't have enough input for another complete input \ + character. */ \ + result = __GCONV_INCOMPLETE_INPUT; \ + break; \ + } \ + \ + inptr += 2; \ + u2 = bswap_16 (get16 (inptr)); \ + if (__builtin_expect (u2 < 0xdc00, 0) \ + || __builtin_expect (u2 > 0xdfff, 0)) \ + { \ + /* This is no valid second word for a surrogate. */ \ + inptr -= 2; \ + STANDARD_FROM_LOOP_ERR_HANDLER (2); \ + } \ + \ + put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \ + inptr += 2; \ + } \ + } \ + else \ + { \ + if (__builtin_expect (u1 < 0xd800, 1) || u1 > 0xdfff) \ + { \ + /* No surrogate. */ \ + put32 (outptr, u1); \ + inptr += 2; \ + } \ + else \ + { \ + if (__glibc_unlikely (u1 >= 0xdc00)) \ + { \ + /* This is no valid first word for a surrogate. */ \ + STANDARD_FROM_LOOP_ERR_HANDLER (2); \ + } \ + \ + /* It's a surrogate character. At least the first word says \ + it is. */ \ + if (__glibc_unlikely (inptr + 4 > inend)) \ + { \ + /* We don't have enough input for another complete input \ + character. */ \ + result = __GCONV_INCOMPLETE_INPUT; \ + break; \ + } \ + \ + inptr += 2; \ + uint16_t u2 = get16 (inptr); \ + if (__builtin_expect (u2 < 0xdc00, 0) \ + || __builtin_expect (u2 > 0xdfff, 0)) \ + { \ + /* This is no valid second word for a surrogate. */ \ + inptr -= 2; \ + STANDARD_FROM_LOOP_ERR_HANDLER (2); \ + } \ + \ + put32 (outptr, ((u1 - 0xd7c0) << 10) + (u2 - 0xdc00)); \ + inptr += 2; \ + } \ + } \ + outptr += 4; \ + } +#define LOOP_NEED_FLAGS +#define EXTRA_LOOP_DECLS \ + , int swap +#include <iconv/loop.c> + + +/* Now define the toplevel functions. */ +#include <iconv/skeleton.c> |