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/* catdvi - get text from DVI files
Copyright (C) 2000 Bjoern Brill <brill@fs.math.uni-frankfurt.de>
This program 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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include "linebuf.h"
#include "util.h"
void linebuf_init(linebuf_t * this, size_t initial_size_alloc)
{
if (initial_size_alloc == 0) initial_size_alloc = 81;
this->size_alloc = initial_size_alloc;
this->gstring = malloc(initial_size_alloc * sizeof(glyph_t));
if(!this->gstring) enomem();
linebuf_clear(this);
}
void linebuf_garray_init(linebuf_t * this, const glyph_t garray[], size_t len)
{
this->size_curr = len;
this->size_alloc = len + 1;
this->gstring = malloc(this->size_alloc * sizeof(glyph_t));
if(!this->gstring) enomem();
memcpy(this->gstring, garray, sizeof(glyph_t) * this->size_alloc);
this->gstring[this->size_curr] = 0;
}
void linebuf_garray0_init(linebuf_t * this, const glyph_t garray0[])
{
int len = 0;
while(garray0[len] != 0) ++len;
linebuf_garray_init(this, garray0, len);
}
void linebuf_done(linebuf_t * this)
{
assert(this->gstring);
free(this->gstring);
this->gstring = NULL;
}
void linebuf_clear(linebuf_t * this)
{
assert(this->gstring);
this->size_curr = 0;
this->gstring[0] = 0;
}
static void linebuf_need_size(linebuf_t * this, size_t size)
{
assert(this->gstring);
if (size < this->size_alloc) return;
while(size >= this->size_alloc) this->size_alloc *= 2;
this->gstring = realloc(
this->gstring,
this->size_alloc * sizeof(glyph_t)
);
if (!this->gstring) enomem();
}
void linebuf_putg(linebuf_t * this, glyph_t g)
{
assert(this->gstring);
this->gstring[this->size_curr++] = g;
if(this->size_curr >= this->size_alloc) {
/* This check is not required before calling linebuf_need_size(),
* but saves a function call in most cases.
*/
linebuf_need_size(this, this->size_curr);
}
this->gstring[this->size_curr] = 0;
}
glyph_t linebuf_peekg(linebuf_t * this)
{
assert(this->gstring);
if(this->size_curr == 0) return(0);
return(this->gstring[this->size_curr - 1]);
}
glyph_t linebuf_unputg(linebuf_t * this)
{
glyph_t last;
assert(this->gstring);
if(this->size_curr == 0) return(0);
last = this->gstring[--(this->size_curr)];
this->gstring[this->size_curr] = 0;
return(last);
}
void linebuf_append(linebuf_t * this, const linebuf_t * appendix)
{
assert(this->gstring);
linebuf_need_size(this, this->size_curr + appendix->size_curr);
memcpy(
this->gstring + this->size_curr,
appendix->gstring,
sizeof(glyph_t) * appendix->size_curr
);
this->size_curr += appendix->size_curr;
this->gstring[this->size_curr] = 0;
}
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