1 files changed, 40 insertions, 0 deletions
diff --git a/src/libventi/parsescore.c b/src/libventi/parsescore.c
new file mode 100644
index 00000000..2c38808b
--- /dev/null
+++ b/src/libventi/parsescore.c
@@ -0,0 +1,40 @@
+#include <u.h>
+#include <libc.h>
+#include <venti.h>
+
+int
+vtparsescore(char *s, char **prefix, uchar score[VtScoreSize])
+{
+	int i, c;
+	char *buf, *colon;
+
+	if((colon = strchr(s, ':')) != nil)
+		buf = colon+1;
+	else
+		buf = s;
+
+	if(strlen(buf) != 2*VtScoreSize)
+		return -1;
+
+	memset(score, 0, VtScoreSize);
+	for(i=0; i<2*VtScoreSize; i++){
+		if(buf[i] >= '0' && buf[i] <= '9')
+			c = buf[i] - '0';
+		else if(buf[i] >= 'a' && buf[i] <= 'z')
+			c = buf[i] - 'a' + 10;
+		else if(buf[i] >= 'A' && buf[i] <= 'Z')
+			c = buf[i] - 'A' + 10;
+		else
+			return -1;
+
+		if((i & 1) == 0)
+			c <<= 4;
+		score[i>>1] |= c;
+	}
+	if(colon){
+		*colon = 0;
+		*prefix = s;
+	}else
+		*prefix = nil;
+	return 0;
+}