mirror of
https://github.com/reactos/CMake.git
synced 2024-11-24 20:19:53 +00:00
ff1f8d0b53
These were revealed by GCC's -Wconversion option. Fix types where it is easy to do so. Cast in cases we know the integer will not be truncated.
85 lines
2.7 KiB
C
85 lines
2.7 KiB
C
/*============================================================================
|
|
CMake - Cross Platform Makefile Generator
|
|
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
|
|
|
|
Distributed under the OSI-approved BSD License (the "License");
|
|
see accompanying file Copyright.txt for details.
|
|
|
|
This software is distributed WITHOUT ANY WARRANTY; without even the
|
|
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the License for more information.
|
|
============================================================================*/
|
|
#include "cm_utf8.h"
|
|
|
|
/*
|
|
RFC 3629
|
|
07-bit: 0xxxxxxx
|
|
11-bit: 110xxxxx 10xxxxxx
|
|
16-bit: 1110xxxx 10xxxxxx 10xxxxxx
|
|
21-bit: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
|
|
|
|
Pre-RFC Compatibility
|
|
26-bit: 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
|
|
31-bit: 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
|
|
*/
|
|
|
|
/* Number of leading ones before a zero in the byte. */
|
|
static unsigned char const cm_utf8_ones[256] = {
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
|
|
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
|
|
2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
|
|
3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,7,8
|
|
};
|
|
|
|
/* Mask away control bits from bytes with n leading ones. */
|
|
static unsigned char const cm_utf8_mask[7] = {
|
|
0xEF, 0x3F, 0x1F, 0x0F, 0x07, 0x03, 0x01
|
|
};
|
|
|
|
/* Minimum allowed value when first byte has n leading ones. */
|
|
static unsigned int const cm_utf8_min[7] = {
|
|
0, 0, 1u<<7, 1u<<11, 1u<<16, 1u<<21, 1u<<26 /*, 1u<<31 */
|
|
};
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
const char* cm_utf8_decode_character(const char* first, const char* last,
|
|
unsigned int* pc)
|
|
{
|
|
/* Count leading ones in the first byte. */
|
|
unsigned char c = (unsigned char)*first++;
|
|
unsigned char const ones = cm_utf8_ones[c];
|
|
switch(ones)
|
|
{
|
|
case 0: *pc = c; return first; /* One-byte character. */
|
|
case 1: case 7: case 8: return 0; /* Invalid leading byte. */
|
|
default: break;
|
|
}
|
|
|
|
/* Extract bits from this multi-byte character. */
|
|
{
|
|
unsigned int uc = c & cm_utf8_mask[ones];
|
|
int left;
|
|
for(left = ones-1; left && first != last; --left)
|
|
{
|
|
c = (unsigned char)*first++;
|
|
if(cm_utf8_ones[c] != 1)
|
|
{
|
|
return 0;
|
|
}
|
|
uc = (uc << 6) | (c & cm_utf8_mask[1]);
|
|
}
|
|
|
|
if(left > 0 || uc < cm_utf8_min[ones])
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
*pc = uc;
|
|
return first;
|
|
}
|
|
}
|