00001 #include "num_read_write.h"
00002 namespace tpt {
00003 typedef unsigned char uchar;
00004
00005 void
00006 numwrite(std::ostream& out, uint16_t const& x)
00007 {
00008 char buf[2];
00009 buf[0] = x%256;
00010 buf[1] = (x>>8)%256;
00011 out.write(buf,2);
00012 }
00013
00014 void
00015 numwrite(std::ostream& out, uint32_t const& x)
00016 {
00017 char buf[4];
00018 buf[0] = x%256;
00019 buf[1] = (x>>8)%256;
00020 buf[2] = (x>>16)%256;
00021 buf[3] = (x>>24)%256;
00022 out.write(buf,4);
00023 }
00024
00025 void
00026 numwrite(std::ostream& out, uint64_t const& x)
00027 {
00028 char buf[8];
00029 buf[0] = x%256;
00030 buf[1] = (x>>8)%256;
00031 buf[2] = (x>>16)%256;
00032 buf[3] = (x>>24)%256;
00033 buf[4] = (x>>32)%256;
00034 buf[5] = (x>>40)%256;
00035 buf[6] = (x>>48)%256;
00036 buf[7] = (x>>56)%256;
00037 out.write(buf,8);
00038 }
00039
00040 char const*
00041 numread(char const* src, uint16_t & x)
00042 {
00043 uchar const* d = reinterpret_cast<uchar const*>(src);
00044 x = (uint16_t(d[0])<<0) | (uint16_t(d[1])<<8);
00045 return src+2;
00046 }
00047
00048 char const*
00049 numread(char const* src, uint32_t & x)
00050 {
00051 uchar const* d = reinterpret_cast<uchar const*>(src);
00052 x = ((uint32_t(d[0])<<0) |
00053 (uint32_t(d[1])<<8) |
00054 (uint32_t(d[2])<<16)|
00055 (uint32_t(d[3])<<24));
00056 return src+4;
00057 }
00058
00059 char const*
00060 numread(char const* src, uint64_t & x)
00061 {
00062 uchar const* d = reinterpret_cast<uchar const*>(src);
00063 x = ((uint64_t(d[0])<<0) |
00064 (uint64_t(d[1])<<8) |
00065 (uint64_t(d[2])<<16) |
00066 (uint64_t(d[3])<<24) |
00067 (uint64_t(d[4])<<32) |
00068 (uint64_t(d[5])<<40) |
00069 (uint64_t(d[6])<<48) |
00070 (uint64_t(d[7])<<56));
00071 return src+8;
00072 }
00073
00074 }
