diff options
Diffstat (limited to 'src/common/utils.c')
| -rw-r--r-- | src/common/utils.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/common/utils.c b/src/common/utils.c index 9a7d4971b..47747dd32 100644 --- a/src/common/utils.c +++ b/src/common/utils.c @@ -263,7 +263,59 @@ uint32 MakeDWord(uint16 word0, uint16 word1) ( (uint32)(word0 ) )| ( (uint32)(word1 << 0x10) ); } +/************************************* +* Big-endian compatibility functions * +* From mapcache.c * +*************************************/ +// Converts an int16 from current machine order to little-endian +int16 MakeShortLE(int16 val) +{ + unsigned char buf[2]; + buf[0] = (unsigned char)( (val & 0x00FF) ); + buf[1] = (unsigned char)( (val & 0xFF00) >> 0x08 ); + return *((int16*)buf); +} + +// Converts an int32 from current machine order to little-endian +int32 MakeLongLE(int32 val) +{ + unsigned char buf[4]; + buf[0] = (unsigned char)( (val & 0x000000FF) ); + buf[1] = (unsigned char)( (val & 0x0000FF00) >> 0x08 ); + buf[2] = (unsigned char)( (val & 0x00FF0000) >> 0x10 ); + buf[3] = (unsigned char)( (val & 0xFF000000) >> 0x18 ); + return *((int32*)buf); +} + +// Reads an uint16 in little-endian from the buffer +uint16 GetUShort(const unsigned char* buf) +{ + return ( ((uint16)(buf[0])) ) + |( ((uint16)(buf[1])) << 0x08 ); +} + +// Reads an uint32 in little-endian from the buffer +uint32 GetULong(const unsigned char* buf) +{ + return ( ((uint32)(buf[0])) ) + |( ((uint32)(buf[1])) << 0x08 ) + |( ((uint32)(buf[2])) << 0x10 ) + |( ((uint32)(buf[3])) << 0x18 ); +} + +// Reads an int32 in little-endian from the buffer +int32 GetLong(const unsigned char* buf) +{ + return (int32)GetULong(buf); +} + +// Reads a float (32 bits) from the buffer +float GetFloat(const unsigned char* buf) +{ + uint32 val = GetULong(buf); + return *((float*)(void*)&val); +} /// calculates the value of A / B, in percent (rounded down) unsigned int get_percentage(const unsigned int A, const unsigned int B) |