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WebSVN – planix.SVN – Blame – /os/branches/planix-v0/sys/src/libventi/parsescore.c – Rev 2

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#include <u.h>
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#include <libc.h>
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#include <venti.h>
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int
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vtparsescore(char *s, char **prefix, uchar score[VtScoreSize])
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{
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	int i, c;
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	char *buf, *colon;
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	if((colon = strchr(s, ':')) != nil)
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		buf = colon+1;
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	else
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		buf = s;
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	if(strlen(buf) != 2*VtScoreSize)
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		return -1;
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	memset(score, 0, VtScoreSize);
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	for(i=0; i<2*VtScoreSize; i++){
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		if(buf[i] >= '0' && buf[i] <= '9')
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			c = buf[i] - '0';
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		else if(buf[i] >= 'a' && buf[i] <= 'z')
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			c = buf[i] - 'a' + 10;
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		else if(buf[i] >= 'A' && buf[i] <= 'Z')
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			c = buf[i] - 'A' + 10;
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		else
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			return -1;
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		if((i & 1) == 0)
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			c <<= 4;
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		score[i>>1] |= c;
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	}
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	if(colon){
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		*colon = 0;
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		if(prefix)
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			*prefix = s;
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	}else{
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		if(prefix)
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			*prefix = nil;
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	}
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	return 0;
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}