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/*
* Unicode routines for use inside the server
*
* Copyright (C) 1999 Alexandre Julliard
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <ctype.h>
#include <stdio.h>
#include "unicode.h"
/* number of following bytes in sequence based on first byte value (for bytes above 0x7f) */
static const char utf8_length[128] =
{
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x80-0x8f */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0x90-0x9f */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xa0-0xaf */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0xb0-0xbf */
0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0xc0-0xcf */
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, /* 0xd0-0xdf */
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, /* 0xe0-0xef */
3,3,3,3,3,0,0,0,0,0,0,0,0,0,0,0 /* 0xf0-0xff */
};
/* first byte mask depending on UTF-8 sequence length */
static const unsigned char utf8_mask[4] = { 0x7f, 0x1f, 0x0f, 0x07 };
/* minimum Unicode value depending on UTF-8 sequence length */
static const unsigned int utf8_minval[4] = { 0x0, 0x80, 0x800, 0x10000 };
static inline char to_hex( char ch )
{
if (isdigit(ch)) return ch - '0';
return tolower(ch) - 'a' + 10;
}
/* parse an escaped string back into Unicode */
/* return the number of chars read from the input, or -1 on output overflow */
int parse_strW( WCHAR *buffer, data_size_t *len, const char *src, char endchar )
{
WCHAR *dest = buffer;
WCHAR *end = buffer + *len / sizeof(WCHAR);
const char *p = src;
unsigned char ch;
while (*p && *p != endchar && dest < end)
{
if (*p == '\\')
{
p++;
if (!*p) break;
switch(*p)
{
case 'a': *dest++ = '\a'; p++; continue;
case 'b': *dest++ = '\b'; p++; continue;
case 'e': *dest++ = '\e'; p++; continue;
case 'f': *dest++ = '\f'; p++; continue;
case 'n': *dest++ = '\n'; p++; continue;
case 'r': *dest++ = '\r'; p++; continue;
case 't': *dest++ = '\t'; p++; continue;
case 'v': *dest++ = '\v'; p++; continue;
case 'x': /* hex escape */
p++;
if (!isxdigit(*p)) *dest = 'x';
else
{
*dest = to_hex(*p++);
if (isxdigit(*p)) *dest = (*dest * 16) + to_hex(*p++);
if (isxdigit(*p)) *dest = (*dest * 16) + to_hex(*p++);
if (isxdigit(*p)) *dest = (*dest * 16) + to_hex(*p++);
}
dest++;
continue;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7': /* octal escape */
*dest = *p++ - '0';
if (*p >= '0' && *p <= '7') *dest = (*dest * 8) + (*p++ - '0');
if (*p >= '0' && *p <= '7') *dest = (*dest * 8) + (*p++ - '0');
dest++;
continue;
}
/* unrecognized escape: fall through to normal char handling */
}
ch = *p++;
if (ch < 0x80) *dest++ = ch;
else /* parse utf8 char */
{
int charlen = utf8_length[ch-0x80];
unsigned int res = ch & utf8_mask[charlen];
switch(charlen)
{
case 3:
if ((ch = *p ^ 0x80) >= 0x40) break;
res = (res << 6) | ch;
p++;
case 2:
if ((ch = *p ^ 0x80) >= 0x40) break;
res = (res << 6) | ch;
p++;
case 1:
if ((ch = *p ^ 0x80) >= 0x40) break;
res = (res << 6) | ch;
p++;
if (res < utf8_minval[charlen]) break;
if (res > 0x10ffff) break;
if (res <= 0xffff) *dest++ = res;
else /* we need surrogates */
{
res -= 0x10000;
*dest++ = 0xd800 | (res >> 10);
if (dest < end) *dest++ = 0xdc00 | (res & 0x3ff);
}
continue;
}
/* ignore invalid char */
}
}
if (dest >= end) return -1; /* overflow */
*dest++ = 0;
if (!*p) return -1; /* delimiter not found */
*len = (dest - buffer) * sizeof(WCHAR);
return p + 1 - src;
}
/* dump a Unicode string with proper escaping */
int dump_strW( const WCHAR *str, data_size_t len, FILE *f, const char escape[2] )
{
static const char escapes[32] = ".......abtnvfr.............e....";
char buffer[256];
char *pos = buffer;
int count = 0;
for (; len; str++, len--)
{
if (pos > buffer + sizeof(buffer) - 8)
{
fwrite( buffer, pos - buffer, 1, f );
count += pos - buffer;
pos = buffer;
}
if (*str > 127) /* hex escape */
{
if (len > 1 && str[1] < 128 && isxdigit((char)str[1]))
pos += sprintf( pos, "\\x%04x", *str );
else
pos += sprintf( pos, "\\x%x", *str );
continue;
}
if (*str < 32) /* octal or C escape */
{
if (!*str && len == 1) continue; /* do not output terminating NULL */
if (escapes[*str] != '.')
pos += sprintf( pos, "\\%c", escapes[*str] );
else if (len > 1 && str[1] >= '0' && str[1] <= '7')
pos += sprintf( pos, "\\%03o", *str );
else
pos += sprintf( pos, "\\%o", *str );
continue;
}
if (*str == '\\' || *str == escape[0] || *str == escape[1]) *pos++ = '\\';
*pos++ = *str;
}
fwrite( buffer, pos - buffer, 1, f );
count += pos - buffer;
return count;
}
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