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/*
* Copyright (C) 2000, Matias Atria
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <string.h>
#include "common.h"
static Int32 scaled_width(Int32 fix, int scale);
long fsgetn(FILE *p, size_t n)
{
long v;
v = fgetbyte(p);
if(v & 0x80)
v -= 0x100;
while(--n > 0)
v = (v << 8) | fgetbyte(p);
return v;
}
Ulong fugetn(FILE *p, size_t n)
{
Ulong v;
v = fgetbyte(p);
while(--n > 0)
v = (v << 8) | fgetbyte(p);
return v;
}
long msgetn(const Uchar *p, size_t n)
{
long v = (long)*p++;
if(v & 0x80)
v -= 0x100;
while(--n > 0)
v = (v << 8) | *p++;
return v;
}
Ulong mugetn(const Uchar *p, size_t n)
{
Ulong v = (Ulong)*p++;
while(--n > 0)
v = (v << 8) | *p++;
return v;
}
char *read_string(FILE *in, int s, char *buffer, size_t len)
{
int n;
char *str;
n = fugetn(in, s ? s : 1);
if((str = buffer) == NULL || n + 1 > len)
str = mdvi_malloc(n + 1);
if(fread(str, 1, n, in) != n) {
if(str != buffer) mdvi_free(str);
return NULL;
}
str[n] = 0;
return str;
}
size_t read_bcpl(FILE *in, char *buffer, size_t maxlen, size_t wanted)
{
size_t i;
i = (int)fuget1(in);
if(maxlen && i > maxlen)
i = maxlen;
if(fread(buffer, i, 1, in) != 1)
return -1;
buffer[i] = '\0';
while(wanted-- > i)
(void)fgetc(in);
return i;
}
char *read_alloc_bcpl(FILE *in, size_t maxlen, size_t *size)
{
size_t i;
char *buffer;
i = (size_t)fuget1(in);
if(maxlen && i > maxlen)
i = maxlen;
buffer = (char *)malloc(i + 1);
if(buffer == NULL)
return NULL;
if(fread(buffer, i, 1, in) != 1) {
free(buffer);
return NULL;
}
buffer[i] = '\0';
if(size) *size = i;
return buffer;
}
/* stolen from dvips */
static Int32 scaled_width(Int32 fix, int scale)
{
Int32 al, bl;
if(fix < 0)
return -scaled_width(-fix, scale);
if(scale < 0)
return -scaled_width(fix, -scale);
al = fix & 32767;
bl = scale & 32767;
al >>= 15;
bl >>= 15;
return (((al*bl / 32768) + fix*bl + al*scale) / 32 +
fix * scale / 1024);
}
/* buffers */
void buff_free(Buffer *buf)
{
if(buf->data)
mdvi_free(buf->data);
buff_init(buf);
}
void buff_init(Buffer *buf)
{
buf->data = NULL;
buf->size = 0;
buf->length = 0;
}
size_t buff_add(Buffer *buf, const char *data, size_t len)
{
if(!len && data)
len = strlen(data);
if(buf->length + len + 1 > buf->size) {
buf->size = buf->length + len + 256;
buf->data = mdvi_realloc(buf->data, buf->size);
}
memcpy(buf->data + buf->length, data, len);
buf->length += len;
return buf->length;
}
char *buff_gets(Buffer *buf, size_t *length)
{
char *ptr;
char *ret;
size_t len;
ptr = strchr(buf->data, '\n');
if(ptr == NULL)
return NULL;
ptr++; /* include newline */
len = ptr - buf->data;
ret = mdvi_malloc(len + 1);
if(len > 0) {
memcpy(ret, buf->data, len);
memmove(buf->data, buf->data + len, buf->length - len);
buf->length -= len;
}
ret[len] = 0;
if(length) *length = len;
return ret;
}
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