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/*
* Copyright (c) 2003 Gunnar Ritter
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
/* Sccsid @(#)ib_getlin.c 1.2 (gritter) 4/17/03 */
#include <string.h>
#include <stdlib.h>
#include "iblok.h"
size_t
ib_getlin(struct iblok *ip, char **line, size_t *alcd,
void *(*reallc)(void *, size_t))
{
char *nl;
size_t sz, llen = 0, nllen;
for (;;) {
if (ip->ib_cur >= ip->ib_end) {
if (ip->ib_incompl) {
ip->ib_incompl = 0;
return 0;
}
if (ib_read(ip) == EOF) {
if (llen) {
ip->ib_incompl++;
(*line)[llen] = '\0';
return llen;
} else
return 0;
}
/*
* ib_read() advances ib_cur since *ib_cur++ gives
* better performance than *++ib_cur for ib_get().
* Go back again.
*/
ip->ib_cur--;
}
sz = ip->ib_end - ip->ib_cur;
if ((nl = memchr(ip->ib_cur, '\n', sz)) != NULL) {
sz = nl - ip->ib_cur + 1;
if ((nllen = llen + sz + 1) > *alcd) {
*line = reallc(*line, nllen);
*alcd = nllen;
}
memcpy(&(*line)[llen], ip->ib_cur, sz);
(*line)[llen + sz] = '\0';
ip->ib_cur = nl + 1;
return llen + sz;
}
if ((nllen = llen + sz + 1) > *alcd) {
*line = reallc(*line, nllen);
*alcd = nllen;
}
memcpy(&(*line)[llen], ip->ib_cur, sz);
llen += sz;
ip->ib_cur = ip->ib_end;
}
/*NOTREACHED*/
return 0;
}
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