87 lines
987 B
C
87 lines
987 B
C
#include "dat.h"
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#include "fn.h"
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enum
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{
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Maxrunes = nelem(((Str*)0)->r),
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};
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void
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sinit(Str *s, char *src, int n)
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{
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int len;
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s->n = 0;
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while(n > 0 && s->n < Maxrunes){
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len = chartorune(&s->r[s->n], src);
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s->n++;
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src += len;
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n -= len;
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}
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}
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void
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sclear(Str *s)
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{
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s->n = 0;
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}
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void
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sputr(Str *s, Rune r)
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{
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if(s->n >= Maxrunes)
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die("sputr overflow");
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s->r[s->n++] = r;
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}
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void
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spopr(Str *s)
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{
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if(s->n > 0)
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s->r[--s->n] = 0;
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}
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void
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sappend(Str *dst, Str *src)
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{
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int i;
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for(i = 0; i < src->n && dst->n < Maxrunes; i++)
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dst->r[dst->n++] = src->r[i];
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}
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int
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scmp(Str *a, Str *b)
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{
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int i;
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if(a->n != b->n)
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return 1;
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for(i = 0; i < a->n; i++)
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if(a->r[i] != b->r[i])
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return 1;
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return 0;
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}
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int
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stoutf(Str *s, char *buf, int sz)
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{
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int i, n, len;
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n = 0;
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for(i = 0; i < s->n && n < sz - UTFmax; i++){
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len = runetochar(buf + n, &s->r[i]);
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n += len;
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}
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buf[n] = '\0';
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return n;
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}
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Rune
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slastr(Str *s)
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{
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if(s->n < 1)
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return 0;
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return s->r[s->n-1];
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}
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