third_party/exiv2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

introducing getULongLong()

Browse Source
This commit is contained in:
Michał Walenciak 2017-09-14 22:38:48 +02:00
parent dc331ee44a
commit ab27bfab3c
2 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/exiv2/types.hpp
View File

@ -266,6 +266,8 @@ namespace Exiv2 {
EXIV2API uint16_t getUShort(const byte* buf, ByteOrder byteOrder);
//! Read a 4 byte unsigned long value from the data buffer
EXIV2API uint32_t getULong(const byte* buf, ByteOrder byteOrder);
//! Read a 8 byte unsigned long value from the data buffer
EXIV2API uint64_t getULongLong(const byte* buf, ByteOrder byteOrder);
//! Read an 8 byte unsigned rational value from the data buffer
EXIV2API URational getURational(const byte* buf, ByteOrder byteOrder);
//! Read a 2 byte signed short value from the data buffer

16
src/types.cpp
View File

@ -252,6 +252,22 @@ namespace Exiv2 {
}
}
uint64_t getULongLong(const byte* buf, ByteOrder byteOrder)
{
if (byteOrder == littleEndian) {
return (uint64_t)buf[7] << 56 | (uint64_t)buf[6] << 48
| (uint64_t)buf[5] << 40 | (uint64_t)buf[4] << 32
| (uint64_t)buf[3] << 24 | (uint64_t)buf[2] << 16
| (uint64_t)buf[1] << 8 | (uint64_t)buf[0];
}
else {
return (uint64_t)buf[0] << 56 | (uint64_t)buf[1] << 48
| (uint64_t)buf[2] << 40 | (uint64_t)buf[3] << 32
| (uint64_t)buf[4] << 24 | (uint64_t)buf[5] << 16
| (uint64_t)buf[6] << 8 | (uint64_t)buf[7];
}
}
URational getURational(const byte* buf, ByteOrder byteOrder)
{
uint32_t nominator = getULong(buf, byteOrder);