55 lines
788 B
C
55 lines
788 B
C
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#include "std.h"
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#include "dat.h"
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static int
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unhex(char c)
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{
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if('0' <= c && c <= '9')
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return c-'0';
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if('a' <= c && c <= 'f')
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return c-'a'+10;
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if('A' <= c && c <= 'F')
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return c-'A'+10;
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abort();
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return -1;
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}
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int
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hexparse(char *hex, uchar *dat, int ndat)
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{
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int i, n;
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n = strlen(hex);
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if(n%2)
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return -1;
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n /= 2;
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if(n > ndat)
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return -1;
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if(hex[strspn(hex, "0123456789abcdefABCDEF")] != '\0')
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return -1;
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for(i=0; i<n; i++)
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dat[i] = (unhex(hex[2*i])<<4)|unhex(hex[2*i+1]);
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return n;
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}
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char*
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estrappend(char *s, char *fmt, ...)
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{
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char *t;
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int l;
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va_list arg;
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va_start(arg, fmt);
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t = vsmprint(fmt, arg);
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if(t == nil)
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sysfatal("out of memory");
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va_end(arg);
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l = s ? strlen(s) : 0;
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s = erealloc(s, l+strlen(t)+1);
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strcpy(s+l, t);
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free(t);
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return s;
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}
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