1997-10-18 11:34:02 +00:00
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/*
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* Copyright (c) 1994 Paul Vojta. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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2000-02-29 11:27:53 +00:00
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#include <stdio.h>
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1997-10-18 11:34:02 +00:00
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#include "oconfig.h"
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#include "dvi.h"
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2000-02-29 11:27:53 +00:00
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extern char *xmalloc (unsigned, _Xconst char *);
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1997-10-18 11:34:02 +00:00
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/***
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*** VF font reading routines.
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*** Public routine is read_index---because virtual characters are presumed
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*** to be short, we read the whole virtual font in at once, instead of
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*** faulting in characters as needed.
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***/
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#define LONG_CHAR 242
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/*
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* These are parameters which determine whether macros are combined for
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* storage allocation purposes. Small macros ( <= VF_PARM_1 bytes) are
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* combined into chunks of size VF_PARM_2.
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*/
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#ifndef VF_PARM_1
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#define VF_PARM_1 20
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#endif
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#ifndef VF_PARM_2
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#define VF_PARM_2 256
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#endif
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/*
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* The main routine
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*/
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2000-02-29 11:27:53 +00:00
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void read_VF_index(font *fontp, wide_bool hushcs)
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1997-10-18 11:34:02 +00:00
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{
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FILE *VF_file = fontp->file;
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ubyte cmnd;
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ubyte *avail, *availend; /* available space for macros */
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long checksum;
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fontp->read_char = NULL;
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fontp->flags |= FONT_VIRTUAL;
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fontp->set_char_p = set_vf_char;
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2000-02-29 11:27:53 +00:00
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if (_debug & DBG_PK)
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1997-10-18 11:34:02 +00:00
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Printf("Reading VF pixel file %s\n", fontp->filename);
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/*
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* Read preamble.
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*/
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Fseek(VF_file, (long) one(VF_file), 1); /* skip comment */
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checksum = four(VF_file);
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if (!hushcs && checksum && fontp->checksum
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&& checksum != fontp->checksum)
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Fprintf(stderr,
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"Checksum mismatch (dvi = %lu, vf = %lu) in font file %s\n",
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fontp->checksum, checksum, fontp->filename);
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(void) four(VF_file); /* skip design size */
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/*
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* Read the fonts.
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*/
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fontp->vf_table = (struct font **)
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xmalloc(VFTABLELEN * sizeof(struct font *),
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"table of VF TeXnumbers");
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bzero((char *) fontp->vf_table, VFTABLELEN * sizeof(struct font *));
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fontp->vf_chain = NULL;
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fontp->first_font = NULL;
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while ((cmnd = one(VF_file)) >= FNTDEF1 && cmnd <= FNTDEF4) {
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struct font *newfontp = define_font(VF_file, cmnd, fontp,
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fontp->vf_table, VFTABLELEN, &fontp->vf_chain);
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if (fontp->first_font == NULL) fontp->first_font = newfontp;
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}
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/*
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* Prepare macro array.
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*/
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fontp->macro = (struct macro *) xmalloc(256 * sizeof(struct macro),
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"macro array");
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bzero((char *) fontp->macro, 256 * sizeof(struct macro));
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/*
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* Read macros.
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*/
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avail = availend = NULL;
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for (; cmnd <= LONG_CHAR; cmnd = one(VF_file)) {
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register struct macro *m;
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int len;
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unsigned long cc;
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long width;
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if (cmnd == LONG_CHAR) { /* long form packet */
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len = four(VF_file);
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cc = four(VF_file);
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width = four(VF_file);
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if (cc >= 256) {
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Fprintf(stderr,
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"Virtual character %lu in font %s ignored.\n",
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cc, fontp->fontname);
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Fseek(VF_file, (long) len, 1);
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continue;
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}
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}
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else { /* short form packet */
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len = cmnd;
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cc = one(VF_file);
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width = num(VF_file, 3);
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}
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m = &fontp->macro[cc];
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m->dvi_adv = width * fontp->dimconv;
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if (len > 0) {
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if (len <= availend - avail) {
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m->pos = avail;
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avail += len;
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}
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else {
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m->free_me = True;
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if (len <= VF_PARM_1) {
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m->pos = avail = (ubyte *) xmalloc(VF_PARM_2,
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"macro array");
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availend = avail + VF_PARM_2;
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avail += len;
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}
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else m->pos = (ubyte *) xmalloc((unsigned) len,
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"macro array");
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}
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Fread((char *) m->pos, 1, len, VF_file);
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m->end = m->pos + len;
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}
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2000-02-29 11:27:53 +00:00
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if (_debug & DBG_PK)
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1997-10-18 11:34:02 +00:00
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Printf("Read VF macro for character %lu; dy = %ld, length = %d\n",
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cc, m->dvi_adv, len);
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}
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if (cmnd != POST)
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oops("Wrong command byte found in VF macro list: %d", cmnd);
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Fclose (VF_file);
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n_files_left++;
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fontp->file = NULL;
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}
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