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发表于 2012-11-07 00:14 |只看该作者 |倒序浏览

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RT，想求一段十六进制的字符串转换成字符数组！

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seamine_cu

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int hex2asc( char *dest, const unsigned char *src, unsigned int srclen ){ if(!src) return 0; if(!dest) return srclen*2; unsigned int npos=0; for(unsigned int loop=0; loop= 'A' && nibble[j] = 'a' && nibble[j] = '0' && nibble[j]

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发表于 2012-11-07 00:14 |只看该作者

int hex2asc( char *dest, const unsigned char *src, unsigned int srclen )
{
if(!src) return 0;
if(!dest) return srclen*2;
unsigned int npos=0;
for(unsigned int loop=0; loop<srclen; loop++)
npos += sprintf(dest+npos,"%02x",(unsigned char)src[loop]);
return npos;
}

int asc2hex( unsigned char *dest, const char *src, unsigned int srclen )
{
if (!src || !src[0] || srclen%2) return 0;
if (!dest) return srclen/2;

unsigned char nibble[2];
unsigned int destlen = srclen/2;
for (unsigned int i = 0; i < destlen; i ++)
{
nibble[0] = *src ++;
nibble[1] = *src ++;
for (unsigned int j = 0; j < 2; j ++)
{
if (nibble[j] >= 'A' && nibble[j] <= 'F')
nibble[j] = nibble[j] - 'A' + 10;
else if (nibble[j] >= 'a' && nibble[j] <= 'f')
nibble[j] = nibble[j] - 'a' + 10;
else if (nibble[j] >= '0' && nibble[j] <= '9')
nibble[j] = nibble[j] - '0';
else
return 0;
}
dest[i] = nibble[0] << 4; // Set the high nibble
dest[i] |= nibble[1]; // Set the low nibble
}
return destlen;
}