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special case buffer_get_token with token length 1 through memccpy

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leitner 2015-12-17 16:24:17 +00:00
parent 9b2377c4be
commit 9cfa19396e
1 changed files with 25 additions and 6 deletions
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31
buffer/buffer_get_token.c
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@ -2,16 +2,35 @@
#include "buffer.h"
#include "scan.h"
#include <string.h> /* for memccpy */
ssize_t buffer_get_token(buffer* b,char* x,size_t len,const char* charset,size_t setlen) {
size_t blen;
if ((ssize_t)len<0) len=(ssize_t)(((size_t)-1)>>1);
for (blen=0;blen<len;++blen) {
register ssize_t r;
if ((r=buffer_getc(b,x))<0) return r;
if (r==0) { *x=0; break; }
if (byte_chr(charset,setlen,*x)<setlen) break;
++x;
if (setlen==1) {
for (blen=0; blen<len; ) {
ssize_t n=buffer_feed(b);
char* d;
if (n<=0) return blen;
if (n>(ssize_t)(len-blen)) n=len-blen;
if ((d=memccpy(x+blen,b->x+b->p,(unsigned char)charset[0],n))) {
/* memccpy returns a pointer to the next char after matching
* char or NULL if it copied all bytes it was asked for */
b->p+=(d-(x+blen));
return d-x-1;
}
blen+=n;
b->p+=n;
}
} else {
for (blen=0;blen<len;++blen) {
register ssize_t r;
if ((r=buffer_getc(b,x))<0) return r;
if (r==0) { *x=0; break; }
if (byte_chr(charset,setlen,*x)<setlen) break;
++x;
}
}
return (ssize_t)blen;
}