util.c - 9base - revived minimalist port of Plan 9 userland to Unix
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       ---
       util.c (766B)
       ---
            1 #include "sam.h"
            2 
            3 void
            4 cvttorunes(char *p, int n, Rune *r, int *nb, int *nr, int *nulls)
            5 {
            6         uchar *q;
            7         Rune *s;
            8         int j, w;
            9 
           10         /*
           11          * Always guaranteed that n bytes may be interpreted
           12          * without worrying about partial runes.  This may mean
           13          * reading up to UTFmax-1 more bytes than n; the caller
           14          * knows this.  If n is a firm limit, the caller should
           15          * set p[n] = 0.
           16          */
           17         q = (uchar*)p;
           18         s = r;
           19         for(j=0; j<n; j+=w){
           20                 if(*q < Runeself){
           21                         w = 1;
           22                         *s = *q++;
           23                 }else{
           24                         w = chartorune(s, (char*)q);
           25                         q += w;
           26                 }
           27                 if(*s)
           28                         s++;
           29                 else if(nulls)
           30                         *nulls = TRUE;
           31         }
           32         *nb = (char*)q-p;
           33         *nr = s-r;
           34 }
           35 
           36 void*
           37 fbufalloc(void)
           38 {
           39         return emalloc(BUFSIZE);
           40 }
           41 
           42 void
           43 fbuffree(void *f)
           44 {
           45         free(f);
           46 }
           47 
           48 uint
           49 min(uint a, uint b)
           50 {
           51         if(a < b)
           52                 return a;
           53         return b;
           54 }