mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-11-21 03:14:19 +08:00
360 lines
10 KiB
C
360 lines
10 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* Copyright 1996-2009 The NASM Authors - All Rights Reserved
|
|
* See the file AUTHORS included with the NASM distribution for
|
|
* the specific copyright holders.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
|
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
|
|
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
|
|
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* ----------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* strfunc.c
|
|
*
|
|
* String transformation functions
|
|
*/
|
|
|
|
#include "nasmlib.h"
|
|
#include "nasm.h"
|
|
|
|
/*
|
|
* Convert a string in UTF-8 format to UTF-16LE
|
|
*/
|
|
static size_t utf8_to_16le(uint8_t *str, size_t len, char *op)
|
|
{
|
|
#define EMIT(x) do { if (op) { WRITESHORT(op,x); } outlen++; } while(0)
|
|
|
|
size_t outlen = 0;
|
|
int expect = 0;
|
|
uint8_t c;
|
|
uint32_t v = 0, vmin = 0;
|
|
|
|
while (len--) {
|
|
c = *str++;
|
|
|
|
if (expect) {
|
|
if ((c & 0xc0) != 0x80) {
|
|
expect = 0;
|
|
return -1;
|
|
} else {
|
|
v = (v << 6) | (c & 0x3f);
|
|
if (!--expect) {
|
|
if (v < vmin || v > 0x10ffff ||
|
|
(v >= 0xd800 && v <= 0xdfff)) {
|
|
return -1;
|
|
} else if (v > 0xffff) {
|
|
v -= 0x10000;
|
|
EMIT(0xd800 | (v >> 10));
|
|
EMIT(0xdc00 | (v & 0x3ff));
|
|
} else {
|
|
EMIT(v);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (c < 0x80) {
|
|
EMIT(c);
|
|
} else if (c < 0xc0 || c >= 0xfe) {
|
|
/* Invalid UTF-8 */
|
|
return -1;
|
|
} else if (c < 0xe0) {
|
|
v = c & 0x1f;
|
|
expect = 1;
|
|
vmin = 0x80;
|
|
} else if (c < 0xf0) {
|
|
v = c & 0x0f;
|
|
expect = 2;
|
|
vmin = 0x800;
|
|
} else if (c < 0xf8) {
|
|
v = c & 0x07;
|
|
expect = 3;
|
|
vmin = 0x10000;
|
|
} else if (c < 0xfc) {
|
|
v = c & 0x03;
|
|
expect = 4;
|
|
vmin = 0x200000;
|
|
} else {
|
|
v = c & 0x01;
|
|
expect = 5;
|
|
vmin = 0x4000000;
|
|
}
|
|
}
|
|
|
|
return expect ? (size_t)-1 : outlen << 1;
|
|
|
|
#undef EMIT
|
|
}
|
|
|
|
/*
|
|
* Convert a string in UTF-8 format to UTF-16BE
|
|
*/
|
|
static size_t utf8_to_16be(uint8_t *str, size_t len, char *op)
|
|
{
|
|
#define EMIT(x) \
|
|
do { \
|
|
uint16_t _y = (x); \
|
|
if (op) { \
|
|
WRITECHAR(op, _y >> 8); \
|
|
WRITECHAR(op, _y); \
|
|
} \
|
|
outlen++; \
|
|
} while (0) \
|
|
|
|
size_t outlen = 0;
|
|
int expect = 0;
|
|
uint8_t c;
|
|
uint32_t v = 0, vmin = 0;
|
|
|
|
while (len--) {
|
|
c = *str++;
|
|
|
|
if (expect) {
|
|
if ((c & 0xc0) != 0x80) {
|
|
expect = 0;
|
|
return -1;
|
|
} else {
|
|
v = (v << 6) | (c & 0x3f);
|
|
if (!--expect) {
|
|
if (v < vmin || v > 0x10ffff ||
|
|
(v >= 0xd800 && v <= 0xdfff)) {
|
|
return -1;
|
|
} else if (v > 0xffff) {
|
|
v -= 0x10000;
|
|
EMIT(0xdc00 | (v & 0x3ff));
|
|
EMIT(0xd800 | (v >> 10));
|
|
} else {
|
|
EMIT(v);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (c < 0x80) {
|
|
EMIT(c);
|
|
} else if (c < 0xc0 || c >= 0xfe) {
|
|
/* Invalid UTF-8 */
|
|
return -1;
|
|
} else if (c < 0xe0) {
|
|
v = c & 0x1f;
|
|
expect = 1;
|
|
vmin = 0x80;
|
|
} else if (c < 0xf0) {
|
|
v = c & 0x0f;
|
|
expect = 2;
|
|
vmin = 0x800;
|
|
} else if (c < 0xf8) {
|
|
v = c & 0x07;
|
|
expect = 3;
|
|
vmin = 0x10000;
|
|
} else if (c < 0xfc) {
|
|
v = c & 0x03;
|
|
expect = 4;
|
|
vmin = 0x200000;
|
|
} else {
|
|
v = c & 0x01;
|
|
expect = 5;
|
|
vmin = 0x4000000;
|
|
}
|
|
}
|
|
|
|
return expect ? (size_t)-1 : outlen << 1;
|
|
|
|
#undef EMIT
|
|
}
|
|
|
|
/*
|
|
* Convert a string in UTF-8 format to UTF-32LE
|
|
*/
|
|
static size_t utf8_to_32le(uint8_t *str, size_t len, char *op)
|
|
{
|
|
#define EMIT(x) do { if (op) { WRITELONG(op,x); } outlen++; } while(0)
|
|
|
|
size_t outlen = 0;
|
|
int expect = 0;
|
|
uint8_t c;
|
|
uint32_t v = 0, vmin = 0;
|
|
|
|
while (len--) {
|
|
c = *str++;
|
|
|
|
if (expect) {
|
|
if ((c & 0xc0) != 0x80) {
|
|
return -1;
|
|
} else {
|
|
v = (v << 6) | (c & 0x3f);
|
|
if (!--expect) {
|
|
if (v < vmin || (v >= 0xd800 && v <= 0xdfff)) {
|
|
return -1;
|
|
} else {
|
|
EMIT(v);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (c < 0x80) {
|
|
EMIT(c);
|
|
} else if (c < 0xc0 || c >= 0xfe) {
|
|
/* Invalid UTF-8 */
|
|
return -1;
|
|
} else if (c < 0xe0) {
|
|
v = c & 0x1f;
|
|
expect = 1;
|
|
vmin = 0x80;
|
|
} else if (c < 0xf0) {
|
|
v = c & 0x0f;
|
|
expect = 2;
|
|
vmin = 0x800;
|
|
} else if (c < 0xf8) {
|
|
v = c & 0x07;
|
|
expect = 3;
|
|
vmin = 0x10000;
|
|
} else if (c < 0xfc) {
|
|
v = c & 0x03;
|
|
expect = 4;
|
|
vmin = 0x200000;
|
|
} else {
|
|
v = c & 0x01;
|
|
expect = 5;
|
|
vmin = 0x4000000;
|
|
}
|
|
}
|
|
|
|
return expect ? (size_t)-1 : outlen << 2;
|
|
|
|
#undef EMIT
|
|
}
|
|
|
|
/*
|
|
* Convert a string in UTF-8 format to UTF-32BE
|
|
*/
|
|
static size_t utf8_to_32be(uint8_t *str, size_t len, char *op)
|
|
{
|
|
#define EMIT(x) \
|
|
do { \
|
|
uint32_t _y = (x); \
|
|
if (op) { \
|
|
WRITECHAR(op,_y >> 24); \
|
|
WRITECHAR(op,_y >> 16); \
|
|
WRITECHAR(op,_y >> 8); \
|
|
WRITECHAR(op,_y); \
|
|
} \
|
|
outlen++; \
|
|
} while (0)
|
|
|
|
size_t outlen = 0;
|
|
int expect = 0;
|
|
uint8_t c;
|
|
uint32_t v = 0, vmin = 0;
|
|
|
|
while (len--) {
|
|
c = *str++;
|
|
|
|
if (expect) {
|
|
if ((c & 0xc0) != 0x80) {
|
|
return -1;
|
|
} else {
|
|
v = (v << 6) | (c & 0x3f);
|
|
if (!--expect) {
|
|
if (v < vmin || (v >= 0xd800 && v <= 0xdfff)) {
|
|
return -1;
|
|
} else {
|
|
EMIT(v);
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (c < 0x80) {
|
|
EMIT(c);
|
|
} else if (c < 0xc0 || c >= 0xfe) {
|
|
/* Invalid UTF-8 */
|
|
return -1;
|
|
} else if (c < 0xe0) {
|
|
v = c & 0x1f;
|
|
expect = 1;
|
|
vmin = 0x80;
|
|
} else if (c < 0xf0) {
|
|
v = c & 0x0f;
|
|
expect = 2;
|
|
vmin = 0x800;
|
|
} else if (c < 0xf8) {
|
|
v = c & 0x07;
|
|
expect = 3;
|
|
vmin = 0x10000;
|
|
} else if (c < 0xfc) {
|
|
v = c & 0x03;
|
|
expect = 4;
|
|
vmin = 0x200000;
|
|
} else {
|
|
v = c & 0x01;
|
|
expect = 5;
|
|
vmin = 0x4000000;
|
|
}
|
|
}
|
|
|
|
return expect ? (size_t)-1 : outlen << 2;
|
|
|
|
#undef EMIT
|
|
}
|
|
|
|
typedef size_t (*transform_func)(uint8_t *, size_t, char *);
|
|
|
|
/*
|
|
* Apply a specific string transform and return it in a nasm_malloc'd
|
|
* buffer, returning the length. On error, returns (size_t)-1 and no
|
|
* buffer is allocated.
|
|
*/
|
|
size_t string_transform(char *str, size_t len, char **out, enum strfunc func)
|
|
{
|
|
/* This should match enum strfunc in nasm.h */
|
|
static const transform_func str_transforms[] = {
|
|
utf8_to_16le,
|
|
utf8_to_16le,
|
|
utf8_to_16be,
|
|
utf8_to_32le,
|
|
utf8_to_32le,
|
|
utf8_to_32be,
|
|
};
|
|
transform_func transform = str_transforms[func];
|
|
size_t outlen;
|
|
uint8_t *s = (uint8_t *)str;
|
|
char *buf;
|
|
|
|
outlen = transform(s, len, NULL);
|
|
if (outlen == (size_t)-1)
|
|
return -1;
|
|
|
|
*out = buf = nasm_malloc(outlen+1);
|
|
buf[outlen] = '\0'; /* Forcibly null-terminate the buffer */
|
|
return transform(s, len, buf);
|
|
}
|