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/*
* libdpkg - Debian packaging suite library routines
* varbuf.c - variable length expandable buffer handling
*
* Copyright (C) 1994,1995 Ian Jackson <ian@chiark.greenend.org.uk>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2,
* or (at your option) any later version.
*
* This is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with dpkg; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <dpkg.h>
#include <dpkg-db.h>
void
varbufaddc(struct varbuf *v, int c)
{
if (v->used >= v->size) varbufextend(v);
v->buf[v->used++]= c;
}
void varbufdupc(struct varbuf *v, int c, ssize_t n) {
size_t old_used = v->used;
v->used += n;
if (v->used >= v->size) varbufextend(v);
memset(v->buf + old_used, c, n);
}
int varbufprintf(struct varbuf *v, const char *fmt, ...) {
int r;
va_list al;
va_start(al, fmt);
r = varbufvprintf(v, fmt, al);
va_end(al);
return r;
}
int varbufvprintf(struct varbuf *v, const char *fmt, va_list va) {
size_t ou;
int r;
va_list al;
ou= v->used;
v->used+= strlen(fmt);
do {
varbufextend(v);
va_copy(al, va);
r= vsnprintf(v->buf+ou,v->size-ou,fmt,al);
va_end(al);
if (r < 0) r= (v->size-ou+1) * 2;
v->used= ou+r;
} while (r >= (int)(v->size - ou - 1));
return r;
}
void varbufaddbuf(struct varbuf *v, const void *s, const int l) {
int ou;
ou= v->used;
v->used += l;
if (v->used >= v->size) varbufextend(v);
memcpy(v->buf + ou, s, l);
}
void
varbufinit(struct varbuf *v, size_t size)
{
v->used = 0;
v->size = size;
if (size)
v->buf = m_malloc(size);
else
v->buf = NULL;
}
void varbufreset(struct varbuf *v) {
v->used= 0;
}
void varbufextend(struct varbuf *v) {
int newsize;
char *newbuf;
newsize= v->size + 80 + v->used;
newbuf = m_realloc(v->buf, newsize);
v->size= newsize;
v->buf= newbuf;
}
void varbuffree(struct varbuf *v) {
free(v->buf); v->buf=NULL; v->size=0; v->used=0;
}
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