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Diffstat (limited to 'Build/source/texk/dvipdfmx/dvipdfmx-20110305/src/dvi.c')
| -rw-r--r-- | Build/source/texk/dvipdfmx/dvipdfmx-20110305/src/dvi.c | 1868 |
1 files changed, 1868 insertions, 0 deletions
diff --git a/Build/source/texk/dvipdfmx/dvipdfmx-20110305/src/dvi.c b/Build/source/texk/dvipdfmx/dvipdfmx-20110305/src/dvi.c new file mode 100644 index 00000000000..0270af88473 --- /dev/null +++ b/Build/source/texk/dvipdfmx/dvipdfmx-20110305/src/dvi.c @@ -0,0 +1,1868 @@ +/* $Header: /home/cvsroot/dvipdfmx/src/dvi.c,v 1.42 2011/03/06 03:14:14 chofchof Exp $ + + This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks. + + Copyright (C) 2002 by Jin-Hwan Cho and Shunsaku Hirata, + the dvipdfmx project team <dvipdfmx@project.ktug.or.kr> + + Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu> + + 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. +*/ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/types.h> +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> + +#include "system.h" +#include "mem.h" +#include "error.h" +#include "mfileio.h" +#include "numbers.h" + +#include "pdfdev.h" +#include "pdfdoc.h" +#include "pdfparse.h" + +#include "fontmap.h" + +#include "dvicodes.h" +#include "tfm.h" +#include "vf.h" +#include "subfont.h" + +#include "spc_util.h" +#include "specials.h" + +#include "dvi.h" + +#define DVI_STACK_DEPTH_MAX 256u +#define TEX_FONTS_ALLOC_SIZE 16u +#define VF_NESTING_MAX 16u + +/* Interal Variables */ +static FILE *dvi_file = NULL; + +static unsigned long *page_loc = NULL; +static UNSIGNED_PAIR num_pages = 0; + +static unsigned long dvi_file_size = 0; + +static struct dvi_header +{ + UNSIGNED_QUAD unit_num; + UNSIGNED_QUAD unit_den; + UNSIGNED_QUAD mag; + UNSIGNED_QUAD media_width, media_height; + UNSIGNED_PAIR stackdepth; + char comment[257]; +} dvi_info = { + 25400000 , /* num */ + 473628672, /* den */ + 1000, /* mag */ + 0, 0, /* media width and height */ + 0, /* stackdepth */ + {'\0'} /* comment */ +}; + +static double dev_origin_x = 72.0, dev_origin_y = 770.0; + +#define PHYSICAL 1 +#define VIRTUAL 2 +#define SUBFONT 3 +#define DVI 1 +#define VF 2 + +static struct loaded_font +{ + int type; /* Type is physical or virtual */ + int font_id; /* id returned by dev (for PHYSICAL fonts) + * or by vf module for (VIRTUAL fonts) + */ + int subfont_id; /* id returned by subfont_locate_font() */ + int tfm_id; + spt_t size; + int source; /* Source is either DVI or VF */ +} *loaded_fonts = NULL; +static int num_loaded_fonts = 0, max_loaded_fonts = 0; + +static void +need_more_fonts (unsigned n) +{ + if (num_loaded_fonts + n > max_loaded_fonts) { + max_loaded_fonts += TEX_FONTS_ALLOC_SIZE; + loaded_fonts = RENEW (loaded_fonts, max_loaded_fonts, struct loaded_font); + } +} + +static struct font_def +{ + long tex_id; + spt_t point_size; + spt_t design_size; + char *font_name; + int font_id; /* index of _loaded_ font in loaded_fonts array */ + int used; +} *def_fonts = NULL; + +static int num_def_fonts = 0, max_def_fonts = 0; +static int compute_boxes = 0, link_annot = 1; +static int verbose = 0; + +void +dvi_set_verbose (void) +{ + verbose++; + subfont_set_verbose(); + tfm_set_verbose(); + vf_set_verbose (); + spc_set_verbose(); +} + +unsigned +dvi_npages (void) +{ + return num_pages; +} + +static const char invalid_signature[] = +"Something is wrong. Are you sure this is a DVI file?"; + +#define range_check_loc(loc) \ + if ((loc) > dvi_file_size) {\ + ERROR(invalid_signature); \ + } + +static long +find_post (void) +{ + long current; + int ch; + + /* First find end of file */ + dvi_file_size = file_size(dvi_file); + current = dvi_file_size; + + /* Scan backwards through PADDING */ + do { + current--; + seek_absolute(dvi_file, current); + } while ((ch = fgetc(dvi_file)) == PADDING && + current > 0); + + /* file_position now points to last non padding character or + * beginning of file */ + if (dvi_file_size - current < 4 || + current == 0 || !(ch == DVI_ID || ch == DVIV_ID)) { + MESG("DVI ID = %d\n", ch); + ERROR(invalid_signature); + } + + /* Make sure post_post is really there */ + current = current - 5; + seek_absolute(dvi_file, current); + if ((ch = fgetc(dvi_file)) != POST_POST) { + MESG("Found %d where post_post opcode should be\n", ch); + ERROR(invalid_signature); + } + current = get_signed_quad(dvi_file); + seek_absolute(dvi_file, current); + if ((ch = fgetc(dvi_file)) != POST) { + MESG("Found %d where post_post opcode should be\n", ch); + ERROR(invalid_signature); + } + + return current; +} + +static void +get_page_info (long post_location) +{ + int i; + + seek_absolute(dvi_file, post_location + 27); + num_pages = get_unsigned_pair(dvi_file); + if (num_pages == 0) { + ERROR("Page count is 0!"); + } + if (verbose > 2) { + MESG("Page count:\t %4d\n", num_pages); + } + + page_loc = NEW(num_pages, unsigned long); + + seek_absolute(dvi_file, post_location + 1); + page_loc[num_pages-1] = get_unsigned_quad(dvi_file); + range_check_loc(page_loc[num_pages-1] + 41); + for (i = num_pages - 2; i >= 0; i--) { + seek_absolute(dvi_file, page_loc[i+1] + 41); + page_loc[i] = get_unsigned_quad(dvi_file); + range_check_loc(page_loc[num_pages-1] + 41); + } +} + +/* Following are computed "constants" used for unit conversion */ +static double dvi2pts = 1.52018, total_mag = 1.0; + +double +dvi_tell_mag (void) +{ + return total_mag; +} + +static void +do_scales (double mag) +{ + total_mag = (double) dvi_info.mag / 1000.0 * mag; + dvi2pts = (double) dvi_info.unit_num / (double) dvi_info.unit_den; + dvi2pts *= (72.0 / 254000.0); +} + +static void +get_dvi_info (long post_location) +{ + seek_absolute(dvi_file, post_location + 5); + + dvi_info.unit_num = get_unsigned_quad(dvi_file); + dvi_info.unit_den = get_unsigned_quad(dvi_file); + dvi_info.mag = get_unsigned_quad(dvi_file); + + dvi_info.media_height = get_unsigned_quad(dvi_file); + dvi_info.media_width = get_unsigned_quad(dvi_file); + + dvi_info.stackdepth = get_unsigned_pair(dvi_file); + + if (dvi_info.stackdepth > DVI_STACK_DEPTH_MAX) { + WARN("DVI need stack depth of %d,", dvi_info.stackdepth); + WARN("but DVI_STACK_DEPTH_MAX is %d.", DVI_STACK_DEPTH_MAX); + ERROR("Capacity exceeded."); + } + + if (verbose > 2) { + MESG("DVI File Info\n"); + MESG("Unit: %ld / %ld\n", dvi_info.unit_num, dvi_info.unit_den); + MESG("Magnification: %ld\n", dvi_info.mag); + MESG("Media Height: %ld\n", dvi_info.media_height); + MESG("Media Width: %ld\n", dvi_info.media_width); + MESG("Stack Depth: %d\n", dvi_info.stackdepth); + } +} + +const char * +dvi_comment (void) +{ + return dvi_info.comment; +} + +static void +read_font_record (SIGNED_QUAD tex_id) +{ + UNSIGNED_BYTE dir_length, name_length; + UNSIGNED_QUAD checksum, point_size, design_size; + char *directory, *font_name; + + if (num_def_fonts >= max_def_fonts) { + max_def_fonts += TEX_FONTS_ALLOC_SIZE; + def_fonts = RENEW (def_fonts, max_def_fonts, struct font_def); + } + checksum = get_unsigned_quad(dvi_file); + point_size = get_unsigned_quad(dvi_file); + design_size = get_unsigned_quad(dvi_file); + dir_length = get_unsigned_byte(dvi_file); + name_length = get_unsigned_byte(dvi_file); + + directory = NEW(dir_length + 1, char); + if (fread(directory, 1, dir_length, dvi_file) != dir_length) { + ERROR(invalid_signature); + } + directory[dir_length] = '\0'; + RELEASE(directory); /* unused */ + + font_name = NEW(name_length + 1, char); + if (fread(font_name, 1, name_length, dvi_file) != name_length) { + ERROR(invalid_signature); + } + font_name[name_length] = '\0'; + def_fonts[num_def_fonts].tex_id = tex_id; + def_fonts[num_def_fonts].font_name = font_name; + def_fonts[num_def_fonts].point_size = point_size; + def_fonts[num_def_fonts].design_size = design_size; + def_fonts[num_def_fonts].used = 0; + num_def_fonts++; + + return; +} + +static void +get_dvi_fonts (long post_location) +{ + UNSIGNED_BYTE code; + SIGNED_QUAD tex_id = 0; + + seek_absolute(dvi_file, post_location + 29); + while ((code = get_unsigned_byte(dvi_file)) != POST_POST) { + switch (code) { + case FNT_DEF1: + tex_id = get_unsigned_byte(dvi_file); + break; + case FNT_DEF2: + tex_id = get_unsigned_pair(dvi_file); + break; + case FNT_DEF3: + tex_id = get_unsigned_triple(dvi_file); + break; + case FNT_DEF4: + tex_id = get_signed_quad(dvi_file); + break; + default: + MESG("Unexpected op code: %3d\n", code); + ERROR(invalid_signature); + } + read_font_record(tex_id); + } + if (verbose > 2) { + unsigned i; + + MESG("\n"); + MESG("DVI file font info\n"); + for (i = 0; i < num_def_fonts; i++) { + MESG("TeX Font: %10s loaded at ID=%5ld, ", + def_fonts[i].font_name, def_fonts[i].tex_id); + MESG("size=%5.2fpt (scaled %4.1f%%)", + def_fonts[i].point_size * dvi2pts, + 100.0 * ((double) def_fonts[i].point_size / def_fonts[i].design_size)); + MESG("\n"); + } + } +} + +static void get_comment (void) +{ + UNSIGNED_BYTE length; + + seek_absolute(dvi_file, 14); + length = get_unsigned_byte(dvi_file); + if (fread(dvi_info.comment, + 1, length, dvi_file) != length) { + ERROR(invalid_signature); + } + dvi_info.comment[length] = '\0'; + if (verbose) { + MESG("DVI Comment: %s\n", dvi_info.comment); + } +} + +/* + * The section below this line deals with the actual processing of the + * dvi file. + * + * The dvi file processor state is contained in the following variables: + */ + +struct dvi_registers +{ + SIGNED_QUAD h, v, w, x, y, z, d; +}; + +static struct dvi_registers dvi_state; +static struct dvi_registers dvi_stack[DVI_STACK_DEPTH_MAX]; +static unsigned dvi_stack_depth = 0 ; +static int current_font = -1; +static int processing_page = 0 ; + +static void +clear_state (void) +{ + dvi_state.h = 0; dvi_state.v = 0; dvi_state.w = 0; + dvi_state.x = 0; dvi_state.y = 0; dvi_state.z = 0; + dvi_state.d = 0; /* direction */ + dvi_stack_depth = 0; + current_font = -1; +} + +/* Migrated from pdfdev.c: + * The following codes are originally put into pdfdev.c. + * But they are moved to here to make PDF output independent + * from DVI input. + * pdfdoc, pdfspecial and htex are also modified. pdfspecial + * and htex does tag/untag depth. pdfdev and pdfdoc now does + * not care about line-breaking at all. + */ +static unsigned marked_depth = 0; +static int tagged_depth = -1; + +static void +dvi_mark_depth (void) +{ + /* If decreasing below tagged_depth */ + if (link_annot && + marked_depth == tagged_depth && + dvi_stack_depth == tagged_depth - 1) { + /* + * See if this appears to be the end of a "logical unit" + * that's been broken. If so, flush the logical unit. + */ + pdf_doc_break_annot(); + } + marked_depth = dvi_stack_depth; +} + +/* + * The following routines setup and tear down a callback at a + * certain stack depth. This is used to handle broken (linewise) + * links. + */ +void +dvi_tag_depth (void) +{ + tagged_depth = marked_depth; + dvi_compute_boxes(1); +} + +void +dvi_untag_depth (void) +{ + tagged_depth = -1; + dvi_compute_boxes(0); +} + +void +dvi_compute_boxes (int flag) +{ + compute_boxes = flag; +} + +void +dvi_link_annot (int flag) +{ + link_annot = flag; +} + +void +dvi_do_special (const void *buffer, UNSIGNED_QUAD size) +{ + double x_user, y_user, mag; + const char *p; + + if (size > 0x7fffffffUL) { + WARN("Special more than %ul bytes???", size); + return; + } + + graphics_mode(); + + p = (const char *) buffer; + + x_user = dvi_state.h * dvi2pts; + y_user = -dvi_state.v * dvi2pts; + mag = dvi_tell_mag(); + + if (spc_exec_special(p, (long) size, x_user, y_user, mag) < 0) { + if (verbose) { + dump(p, p + size); + } + } + + return; +} + +#if 0 +double +dvi_unit_size (void) +{ + return dvi2pts; +} +#endif + + +int +dvi_locate_font (const char *tfm_name, spt_t ptsize) +{ + int cur_id = -1; + const char *name = tfm_name; + int subfont_id = -1, font_id; /* VF or device font ID */ + fontmap_rec *mrec; + + if (verbose) + MESG("<%s@%.2fpt", tfm_name, ptsize * dvi2pts); + + need_more_fonts(1); + + /* This routine needs to be recursive/reentrant. Load current high water + * mark into an automatic variable. + */ + cur_id = num_loaded_fonts++; + + mrec = pdf_lookup_fontmap_record(tfm_name); + /* Load subfont mapping table */ + if (mrec && mrec->charmap.sfd_name && mrec->charmap.subfont_id) { + subfont_id = sfd_load_record(mrec->charmap.sfd_name, mrec->charmap.subfont_id); + } + + /* TFM must exist here. */ + loaded_fonts[cur_id].tfm_id = tfm_open(tfm_name, 1); + loaded_fonts[cur_id].subfont_id = subfont_id; + loaded_fonts[cur_id].size = ptsize; + /* This will be reset later if it was really generated by the dvi file. */ + loaded_fonts[cur_id].source = VF; + + /* The order of searching fonts is as follows: + * + * 1. If mrec is null, that is, there is no map entry matching + * with tfm_name, then search a virtual font matching with + * tfm_name at first. If no virtual font is found, search a + * PK font matching with tfm_name. + * + * 2. If mrec is non-null, search a physical scalable font. + * + * 3. Notice that every subfont gets non-null mrec. In this case, + * enc_name corresponding to mrec will be used instead of mrec. + * That is enc_name is NULL, search a virtual font for Omega (.ovf) + * matching with the base name of the subfont. If no virtual font + * for Omega is found, it is a fatal error because there is no PK font + * for Omega. + */ + if (!mrec) { + font_id = vf_locate_font(tfm_name, ptsize); + if (font_id >= 0) { + loaded_fonts[cur_id].type = VIRTUAL; + loaded_fonts[cur_id].font_id = font_id; + if (verbose) + MESG("(VF)>"); + return cur_id; + } + } +#if 1 + /* Sorry, I don't understand this well... Please fix. + * The purpose of this seems to be: + * + * Map 8-bit char codes in subfont to 16-bit code with SFD mapping + * and map subfonts to single OVF font. + * + * But it apparently only does TFM -> OVF mapping but no character + * code mapping. Please see dvi_set(), you can't have both font->type + * VIRTUAL and font->subfont_id >= 0. Am I missing something? + */ + else if (subfont_id >= 0 && mrec->map_name) + { + fontmap_rec *mrec1 = pdf_lookup_fontmap_record(mrec->map_name); + /* enc_name=NULL should be used only for 'built-in' encoding. + * Please fix this! + */ + if (mrec1 && !mrec1->enc_name) { + font_id = vf_locate_font(mrec1->font_name, ptsize); + if (font_id < 0) + WARN("Could not locate Omega Virtual Font \"%s\" for \"%s\".", + mrec1->font_name, tfm_name); + else { + loaded_fonts[cur_id].type = VIRTUAL; + loaded_fonts[cur_id].font_id = font_id; + if (verbose) + MESG("(OVF)>"); + return cur_id; + } + } + } +#endif /* 1 */ + + /* Failed to load a virtual font so we try to load a physical font. */ + + /* If mrec->map_name is not NULL, font name identified in PDF output + * is different than tfm_name, this can happen for subfonts grouped + * into a single "intermediate" font foo@SFD@. + * This is necessary for optimal output; to avoid unnecessary creation + * of multiple instances of a same font, to avoid frequent font selection + * and break of string_mode. + */ + if (mrec && mrec->map_name) { + name = mrec->map_name; + } else { + name = tfm_name; + } + + /* We need ptsize for PK font creation. */ + font_id = pdf_dev_locate_font(name, ptsize); + if (font_id < 0) { + WARN("Could not locate a virtual/physical font for TFM \"%s\".", tfm_name); + if (mrec && mrec->map_name) { /* has map_name */ + fontmap_rec *mrec1 = pdf_lookup_fontmap_record(mrec->map_name); + WARN(">> This font is mapped to an intermediate 16-bit font \"%s\" with SFD charmap=<%s,%s>,", + mrec->map_name, mrec->charmap.sfd_name, mrec->charmap.subfont_id); + if (!mrec1) + WARN(">> but I couldn't find font mapping for \"%s\".", mrec->map_name); + else { + WARN(">> and then mapped to a physical font \"%s\" by fontmap.", mrec1->font_name); + WARN(">> Please check if kpathsea library can find this font: %s", mrec1->font_name); + } + } else if (mrec && !mrec->map_name) { + WARN(">> This font is mapped to a physical font \"%s\".", mrec->font_name); + WARN(">> Please check if kpathsea library can find this font: %s", mrec->font_name); + } else { + WARN(">> There are no valid font mapping entry for this font."); + WARN(">> Font file name \"%s\" was assumed but failed to locate that font.", tfm_name); + } + ERROR("Cannot proceed without .vf or \"physical\" font for PDF output..."); + } + loaded_fonts[cur_id].type = PHYSICAL; + loaded_fonts[cur_id].font_id = font_id; + + if (verbose) + MESG(">"); + + return cur_id; +} + +double +dvi_dev_xpos (void) +{ + return dvi_state.h * dvi2pts; +} + +double +dvi_dev_ypos (void) +{ + return -(dvi_state.v * dvi2pts); +} + +static void do_moveto (SIGNED_QUAD x, SIGNED_QUAD y) +{ + dvi_state.h = x; + dvi_state.v = y; +} + +void dvi_right (SIGNED_QUAD x) +{ + if (!dvi_state.d) { + dvi_state.h += x; + } else { + dvi_state.v += x; + } +} + +void dvi_down (SIGNED_QUAD y) +{ + if (!dvi_state.d) { + dvi_state.v += y; + } else { + dvi_state.h -= y; + } +} + +/* Please remove this. + * Optimization for 8-bit encodings. + */ +static void +do_string (unsigned char *s, int len) +{ + struct loaded_font *font; + spt_t width, height, depth; + int i; + + if (current_font < 0) + ERROR("No font selected!"); + + font = &loaded_fonts[current_font]; + + width = tfm_string_width(font->tfm_id, s, len); + width = sqxfw(font->size, width); + + switch (font->type) { + case PHYSICAL: + if (font->subfont_id < 0) { + pdf_dev_set_string(dvi_state.h, -dvi_state.v, s, len, + width, font->font_id, 1); + if (compute_boxes && link_annot && + marked_depth >= tagged_depth) { + pdf_rect rect; + + height = tfm_string_height(font->tfm_id, s, len); + depth = tfm_string_depth (font->tfm_id, s, len); + height = sqxfw(font->size, height); + depth = sqxfw(font->size, depth); + + pdf_dev_set_rect (&rect, dvi_state.h, -dvi_state.v, + width, height, depth); + pdf_doc_expand_box(&rect); + } + } else { /* Subfonts */ + dvi_push(); + for (i = 0; i < len; i++) { + dvi_set(s[i]); + } + dvi_pop(); + } + break; + case VIRTUAL: + dvi_push(); + for (i = 0; i < len; i++) { + dvi_set(s[i]); + } + dvi_pop(); + } + if (!dvi_state.d) { + dvi_state.h += width; + } else { + dvi_state.v += width; + } +} + +/* _FIXME_ + * CMap decoder wants multibyte strings as input but + * how DVI char codes are converted to multibyte sting + * is not clear. + */ +void +dvi_set (SIGNED_QUAD ch) +{ + struct loaded_font *font; + spt_t width, height, depth; + unsigned char wbuf[2]; + + if (current_font < 0) { + ERROR("No font selected!"); + } + /* The division by dvi2pts seems strange since we actually know the + * "dvi" size of the fonts contained in the DVI file. In other + * words, we converted from DVI units to pts and back again! + * The problem comes from fonts defined in VF files where we don't know + * the DVI size. It's keeping me sane to keep *point sizes* of *all* + * fonts in the dev.c file and convert them back if necessary. + */ + font = &loaded_fonts[current_font]; + + width = tfm_get_fw_width(font->tfm_id, ch); + width = sqxfw(font->size, width); + + switch (font->type) { + case PHYSICAL: + if (ch > 255) { /* _FIXME_ */ + wbuf[0] = (ch >> 8) & 0xff; + wbuf[1] = ch & 0xff; + pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2, + width, font->font_id, 2); + } else if (font->subfont_id >= 0) { + unsigned short uch = lookup_sfd_record(font->subfont_id, (unsigned char) ch); + wbuf[0] = (uch >> 8) & 0xff; + wbuf[1] = uch & 0xff; + pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2, + width, font->font_id, 2); + } else { + wbuf[0] = (unsigned char) ch; + pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 1, + width, font->font_id, 1); + } + if (compute_boxes && link_annot && + marked_depth >= tagged_depth) { + pdf_rect rect; + + height = tfm_get_fw_height(font->tfm_id, ch); + depth = tfm_get_fw_depth (font->tfm_id, ch); + height = sqxfw(font->size, height); + depth = sqxfw(font->size, depth); + + pdf_dev_set_rect (&rect, dvi_state.h, -dvi_state.v, + width, height, depth); + pdf_doc_expand_box(&rect); + } + break; + case VIRTUAL: +#if 0 + /* See comment in locate_font() */ + if (font->subfont_id >= 0) + ch = lookup_sfd_record(font->subfont_id, (unsigned char) ch); +#endif /* 0 */ + vf_set_char(ch, font->font_id); /* push/pop invoked */ + break; + } + + if (!dvi_state.d) { + dvi_state.h += width; + } else { + dvi_state.v += width; + } +} + +void +dvi_put (SIGNED_QUAD ch) +{ + struct loaded_font *font; + spt_t width, height, depth; + unsigned char wbuf[2]; + + if (current_font < 0) { + ERROR("No font selected!"); + } + + font = &loaded_fonts[current_font]; + + switch (font->type) { + case PHYSICAL: + width = tfm_get_fw_width(font->tfm_id, ch); + width = sqxfw(font->size, width); + + /* Treat a single character as a one byte string and use the + * string routine. + */ + if (ch > 255) { /* _FIXME_ */ + wbuf[0] = (ch >> 8) & 0xff; + wbuf[1] = ch & 0xff; + pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2, + width, font->font_id, 2); + } else if (font->subfont_id >= 0) { + unsigned int uch; + + uch = lookup_sfd_record(font->subfont_id, (unsigned char) ch); + wbuf[0] = (uch >> 8) & 0xff; + wbuf[1] = uch & 0xff; + pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 2, + width, font->font_id, 2); + } else { + wbuf[0] = (unsigned char) ch; + pdf_dev_set_string(dvi_state.h, -dvi_state.v, wbuf, 1, + width, font->font_id, 1); + } + if (compute_boxes && link_annot && + marked_depth >= tagged_depth) { + pdf_rect rect; + + height = tfm_get_fw_height(font->tfm_id, ch); + depth = tfm_get_fw_depth (font->tfm_id, ch); + height = sqxfw(font->size, height); + depth = sqxfw(font->size, depth); + + pdf_dev_set_rect (&rect, dvi_state.h, -dvi_state.v, + width, height, depth); + pdf_doc_expand_box(&rect); + } + break; + case VIRTUAL: +#if 0 + /* See comment in locate_font() */ + if (font->subfont_id >= 0) + ch = lookup_sfd_record(font->subfont_id, (unsigned char) ch); +#endif /* 0 */ + vf_set_char(ch, font->font_id); + break; + } + + return; +} + + +void +dvi_rule (SIGNED_QUAD width, SIGNED_QUAD height) +{ + do_moveto(dvi_state.h, dvi_state.v); + + if (!dvi_state.d) { + pdf_dev_set_rule(dvi_state.h, -dvi_state.v, width, height); + } else { /* right ? */ + pdf_dev_set_rule(dvi_state.h, -dvi_state.v - width, height, width); + } +} + +void +dvi_dir (UNSIGNED_BYTE dir) +{ + dvi_state.d = dir ? 1 : 0; + pdf_dev_set_dirmode(dvi_state.d); /* 0: horizontal, 1: vertical */ +} + +static void +do_set1 (void) +{ + dvi_set(get_unsigned_byte(dvi_file)); +} + +static void +do_set2 (void) +{ + dvi_set(get_unsigned_pair(dvi_file)); +} + +static void +do_setrule (void) +{ + SIGNED_QUAD width, height; + + height = get_signed_quad(dvi_file); + width = get_signed_quad(dvi_file); + if (width > 0 && height > 0) { + dvi_rule(width, height); + } + dvi_right(width); +} + +static void +do_putrule (void) +{ + SIGNED_QUAD width, height; + + height = get_signed_quad (dvi_file); + width = get_signed_quad (dvi_file); + if (width > 0 && height > 0) { + dvi_rule(width, height); + } +} + +static void +do_put1 (void) +{ + dvi_put(get_unsigned_byte(dvi_file)); +} + +static void +do_put2 (void) +{ + dvi_put(get_unsigned_pair(dvi_file)); +} + +void +dvi_push (void) +{ + if (dvi_stack_depth >= DVI_STACK_DEPTH_MAX) + ERROR("DVI stack exceeded limit."); + + dvi_stack[dvi_stack_depth++] = dvi_state; +} + +void +dvi_pop (void) +{ + if (dvi_stack_depth <= 0) + ERROR ("Tried to pop an empty stack."); + + dvi_state = dvi_stack[--dvi_stack_depth]; + do_moveto(dvi_state.h, dvi_state.v); + pdf_dev_set_dirmode(dvi_state.d); /* 0: horizontal, 1: vertical */ +} + + +static void +do_right1 (void) +{ + dvi_right(get_signed_byte(dvi_file)); +} + +static void +do_right2 (void) +{ + dvi_right(get_signed_pair(dvi_file)); +} + +static void +do_right3 (void) +{ + dvi_right(get_signed_triple(dvi_file)); +} + +static void +do_right4 (void) +{ + dvi_right(get_signed_quad(dvi_file)); +} + +void +dvi_w (SIGNED_QUAD ch) +{ + dvi_state.w = ch; + dvi_right(ch); +} + +void +dvi_w0 (void) +{ + dvi_right(dvi_state.w); +} + +static void +do_w1 (void) +{ + dvi_w(get_signed_byte(dvi_file)); +} + +static void +do_w2 (void) +{ + dvi_w(get_signed_pair(dvi_file)); +} + +static void +do_w3 (void) +{ + dvi_w(get_signed_triple(dvi_file)); +} + +static void +do_w4 (void) +{ + dvi_w(get_signed_quad(dvi_file)); +} + +void +dvi_x (SIGNED_QUAD ch) +{ + dvi_state.x = ch; + dvi_right(ch); +} + +void +dvi_x0 (void) +{ + dvi_right(dvi_state.x); +} + +static void +do_x1 (void) +{ + dvi_x(get_signed_byte(dvi_file)); +} + +static void +do_x2 (void) +{ + dvi_x(get_signed_pair(dvi_file)); +} + +static void +do_x3 (void) +{ + dvi_x(get_signed_triple(dvi_file)); +} + +static void +do_x4 (void) +{ + dvi_x(get_signed_quad(dvi_file)); +} + +static void +do_down1 (void) +{ + dvi_down(get_signed_byte(dvi_file)); +} + +static void +do_down2 (void) +{ + dvi_down(get_signed_pair(dvi_file)); +} + +static void +do_down3 (void) +{ + dvi_down(get_signed_triple(dvi_file)); +} + +static void +do_down4 (void) +{ + dvi_down(get_signed_quad(dvi_file)); +} + +void +dvi_y (SIGNED_QUAD ch) +{ + dvi_state.y = ch; + dvi_down(ch); +} + +void +dvi_y0 (void) +{ + dvi_down(dvi_state.y); +} + +static +void do_y1 (void) +{ + dvi_y(get_signed_byte(dvi_file)); +} + +static +void do_y2 (void) +{ + dvi_y(get_signed_pair(dvi_file)); +} + +static +void do_y3 (void) +{ + dvi_y(get_signed_triple(dvi_file)); +} + +static +void do_y4 (void) +{ + dvi_y(get_signed_quad(dvi_file)); +} + +void +dvi_z (SIGNED_QUAD ch) +{ + dvi_state.z = ch; + dvi_down(ch); +} + +void +dvi_z0 (void) +{ + dvi_down(dvi_state.z); +} + +static void +do_z1 (void) +{ + dvi_z(get_signed_byte(dvi_file)); +} + +static void +do_z2 (void) +{ + dvi_z(get_signed_pair(dvi_file)); +} + +static void +do_z3 (void) +{ + dvi_z(get_signed_triple(dvi_file)); +} + +static void +do_z4 (void) +{ + dvi_z(get_signed_quad(dvi_file)); +} + +static void +do_fntdef (void) +{ + int area_len, name_len, i; + + get_signed_quad(dvi_file); + get_signed_quad(dvi_file); + get_signed_quad(dvi_file); + area_len = get_unsigned_byte(dvi_file); + name_len = get_unsigned_byte(dvi_file); + for (i = 0; i < area_len + name_len; i++) { + get_unsigned_byte(dvi_file); + } +} + +static void +do_fntdef1 (void) +{ + get_unsigned_byte(dvi_file); + do_fntdef(); +} + +static void +do_fntdef2 (void) +{ + get_unsigned_pair(dvi_file); + do_fntdef(); +} + +static void +do_fntdef3 (void) +{ + get_unsigned_triple(dvi_file); + do_fntdef(); +} + +static void +do_fntdef4 (void) +{ + get_signed_quad(dvi_file); + do_fntdef(); +} + +void +dvi_set_font (int font_id) +{ + current_font = font_id; +} + +static void +do_fnt (SIGNED_QUAD tex_id) +{ + int i; + + for (i = 0; i < num_def_fonts; i++) { + if (def_fonts[i].tex_id == tex_id) + break; + } + + if (i == num_def_fonts) { + ERROR("Tried to select a font that hasn't been defined: id=%ld", tex_id); + } + + if (!def_fonts[i].used) { + int font_id; + + font_id = dvi_locate_font(def_fonts[i].font_name, def_fonts[i].point_size); + loaded_fonts[font_id].source = DVI; + def_fonts[i].used = 1; + def_fonts[i].font_id = font_id; + } + current_font = def_fonts[i].font_id; +} + +static void +do_fnt1 (void) +{ + SIGNED_QUAD tex_id; + + tex_id = get_unsigned_byte(dvi_file); + do_fnt(tex_id); +} + +static void +do_fnt2 (void) +{ + SIGNED_QUAD tex_id; + + tex_id = get_unsigned_pair(dvi_file); + do_fnt(tex_id); +} + +static void +do_fnt3 (void) +{ + SIGNED_QUAD tex_id; + + tex_id = get_unsigned_triple(dvi_file); + do_fnt(tex_id); +} + +static void +do_fnt4 (void) +{ + SIGNED_QUAD tex_id; + + tex_id = get_signed_quad(dvi_file); + do_fnt(tex_id); +} + +static void +do_xxx (UNSIGNED_QUAD size) +{ + UNSIGNED_QUAD i; + Ubyte *buffer; + + buffer = NEW(size+1, Ubyte); + for (i = 0; i < size; i++) { + buffer[i] = get_unsigned_byte(dvi_file); + } + dvi_do_special(buffer, size); + RELEASE(buffer); +} + +static void +do_xxx1 (void) +{ + SIGNED_QUAD size; + + size = get_unsigned_byte(dvi_file); + do_xxx(size); +} + +static void +do_xxx2 (void) +{ + SIGNED_QUAD size; + + size = get_unsigned_pair(dvi_file); + do_xxx(size); +} + +static void +do_xxx3 (void) +{ + SIGNED_QUAD size; + + size = get_unsigned_triple(dvi_file); + do_xxx(size); +} + +static void +do_xxx4 (void) +{ + SIGNED_QUAD size; + + size = get_unsigned_quad(dvi_file); + do_xxx(size); +} + +static void +do_bop (void) +{ + int i; + + if (processing_page) + ERROR("Got a bop in the middle of a page!"); + + /* For now, ignore TeX's count registers */ + for (i = 0; i < 10; i++) { + get_signed_quad(dvi_file); + } + /* Ignore previous page pointer since we have already + * saved this information + */ + get_signed_quad(dvi_file); + clear_state(); + processing_page = 1; + + pdf_doc_begin_page(dvi_tell_mag(), dev_origin_x, dev_origin_y); + spc_exec_at_begin_page(); + + return; +} + +static void +do_eop (void) +{ + processing_page = 0; + + if (dvi_stack_depth != 0) { + ERROR("DVI stack depth is not zero at end of page"); + } + spc_exec_at_end_page(); + + pdf_doc_end_page(); + + return; +} + +static void +do_dir (void) +{ + dvi_state.d = get_unsigned_byte(dvi_file) ? 1 : 0; + pdf_dev_set_dirmode(dvi_state.d); /* 0: horizontal, 1: vertical */ +} + +/* Note to be absolutely certain that the string escape buffer doesn't + * hit its limit, FORMAT_BUF_SIZE should set to 4 times S_BUFFER_SIZE + * in pdfobj.c. Is there any application that genenerate words with + * 1k characters? + */ + +#define SBUF_SIZE 1024 + +/* Most of the work of actually interpreting + * the dvi file is here. + */ +void +dvi_do_page (unsigned n, + double paper_width, double paper_height, + double hmargin, double vmargin) +{ + unsigned char opcode; + unsigned char sbuf[SBUF_SIZE]; + unsigned int slen = 0; + + if (!page_loc || n >= num_pages) + ERROR("Tried to process non-existent page: %ld", n); + + /* DVI coordinate */ + dev_origin_x = hmargin; + dev_origin_y = paper_height - vmargin; + + seek_absolute(dvi_file, page_loc[n]); + + dvi_stack_depth = 0; + for (;;) { + /* The most likely opcodes are individual setchars. + * These are buffered for speed. */ + slen = 0; + while ((opcode = fgetc(dvi_file)) <= SET_CHAR_127 && + slen < SBUF_SIZE) { + sbuf[slen++] = opcode; + } + if (slen > 0) { + do_string(sbuf, slen); + } + if (slen == SBUF_SIZE) + continue; + + /* If we are here, we have an opcode that is something + * other than SET_CHAR. + */ + if (opcode >= FNT_NUM_0 && opcode <= FNT_NUM_63) { + do_fnt(opcode - FNT_NUM_0); + continue; + } + + switch (opcode) { + case SET1: do_set1(); break; + case SET2: do_set2(); break; + case SET3: case SET4: + ERROR("Multibyte (>16 bits) character not supported!"); + break; + + case SET_RULE: + do_setrule(); + break; + + case PUT1: do_put1(); break; + case PUT2: do_put2(); break; + case PUT3: case PUT4: + ERROR ("Multibyte character (>16 bits) not supported!"); + break; + + case PUT_RULE: + do_putrule(); + break; + + case NOP: + break; + + case BOP: + do_bop(); + break; + case EOP: + do_eop(); + return; + break; + + case PUSH: + dvi_push(); + /* The following line needs to go here instead of in + * dvi_push() since logical structure of document is + * oblivous to virtual fonts. For example the last line on a + * page could be at stack level 3 and the page footer should + * be at stack level 3. However, if the page footer contains + * virtual fonts (or other nested constructions), it could + * fool the link breaker into thinking it was a continuation + * of the link */ + dvi_mark_depth(); + break; + case POP: + dvi_pop(); + /* Above explanation holds for following line too */ + dvi_mark_depth(); + break; + + case RIGHT1: do_right1(); break; + case RIGHT2: do_right2(); break; + case RIGHT3: do_right3(); break; + case RIGHT4: do_right4(); break; + + case W0: dvi_w0(); break; + case W1: do_w1 (); break; + case W2: do_w2 (); break; + case W3: do_w3 (); break; + case W4: do_w4 (); break; + + case X0: dvi_x0(); break; + case X1: do_x1 (); break; + case X2: do_x2 (); break; + case X3: do_x3 (); break; + case X4: do_x4 (); break; + + case DOWN1: do_down1(); break; + case DOWN2: do_down2(); break; + case DOWN3: do_down3(); break; + case DOWN4: do_down4(); break; + + case Y0: dvi_y0(); break; + case Y1: do_y1 (); break; + case Y2: do_y2 (); break; + case Y3: do_y3 (); break; + case Y4: do_y4 (); break; + + case Z0: dvi_z0(); break; + case Z1: do_z1 (); break; + case Z2: do_z2 (); break; + case Z3: do_z3 (); break; + case Z4: do_z4 (); break; + + case FNT1: do_fnt1(); break; + case FNT2: do_fnt2(); break; + case FNT3: do_fnt3(); break; + case FNT4: do_fnt4(); break; + + /* Specials */ + case XXX1: do_xxx1(); break; + case XXX2: do_xxx2(); break; + case XXX3: do_xxx3(); break; + case XXX4: do_xxx4(); break; + + /* Font definition - skipped. */ + case FNT_DEF1: do_fntdef1(); break; + case FNT_DEF2: do_fntdef2(); break; + case FNT_DEF3: do_fntdef3(); break; + case FNT_DEF4: do_fntdef4(); break; + + /* pTeX extension */ + case DIR: + do_dir(); + break; + + case PRE: case POST: case POST_POST: + ERROR("Unexpected preamble or postamble in dvi file"); + break; + default: + ERROR("Unexpected opcode or DVI file ended prematurely"); + } + } +} + +double +dvi_init (const char *dvi_filename, double mag) +{ + long post_location; + + dvi_file = MFOPEN(dvi_filename, FOPEN_RBIN_MODE); + if (!dvi_file) { + ERROR("Could not open specified DVI file: %s", dvi_filename); + return 0.0; + } + + /* DVI files are most easily read backwards by + * searching for post_post and then post opcode. + */ + post_location = find_post(); + get_dvi_info(post_location); + do_scales(mag); + get_page_info(post_location); + get_comment(); + get_dvi_fonts(post_location); + clear_state(); + + return dvi2pts; +} + +void +dvi_close (void) +{ + int i; + + /* We add comment in dvi_close instead of dvi_init so user + * has a change to overwrite it. The docinfo dictionary is + * treated as a write-once record. + */ + + /* Do some house cleaning */ + MFCLOSE(dvi_file); + dvi_file = NULL; + + if (def_fonts) { + for (i = 0; i < num_def_fonts; i++) { + if (def_fonts[i].font_name) + RELEASE(def_fonts[i].font_name); + def_fonts[i].font_name = NULL; + } + RELEASE(def_fonts); + } + def_fonts = NULL; + + if (page_loc) + RELEASE(page_loc); + page_loc = NULL; + num_pages = 0; + + if (loaded_fonts) + RELEASE(loaded_fonts); + loaded_fonts = NULL; + num_loaded_fonts = 0; + + vf_close_all_fonts(); + tfm_close_all (); +} + +/* The following are need to implement virtual fonts + According to documentation, the vf "subroutine" + must have state pushed and must have + w,v,y, and z set to zero. The current font + is determined by the virtual font header, which + may be undefined */ + +static int saved_dvi_font[VF_NESTING_MAX]; +static int num_saved_fonts = 0; + +void +dvi_vf_init (int dev_font_id) +{ + dvi_push(); + + dvi_state.w = 0; dvi_state.x = 0; + dvi_state.y = 0; dvi_state.z = 0; + + /* do not reset dvi_state.d. */ + if (num_saved_fonts < VF_NESTING_MAX) { + saved_dvi_font[num_saved_fonts++] = current_font; + } else + ERROR("Virtual fonts nested too deeply!"); + current_font = dev_font_id; +} + +/* After VF subroutine is finished, we simply pop the DVI stack */ +void +dvi_vf_finish (void) +{ + dvi_pop(); + if (num_saved_fonts > 0) + current_font = saved_dvi_font[--num_saved_fonts]; + else { + ERROR("Tried to pop an empty font stack"); + } +} + + +/* Scan various specials */ +#include "dpxutil.h" + +/* This need to allow 'true' prefix for unit and + * length value must be divided by current magnification. + */ +static int +read_length (double *vp, double mag, const char **pp, const char *endptr) +{ + char *q; + const char *p = *pp; + double v, u = 1.0; + const char *_ukeys[] = { +#define K_UNIT__PT 0 +#define K_UNIT__IN 1 +#define K_UNIT__CM 2 +#define K_UNIT__MM 3 +#define K_UNIT__BP 4 + "pt", "in", "cm", "mm", "bp", + NULL + }; + int k, error = 0; + + q = parse_float_decimal(&p, endptr); + if (!q) { + *vp = 0.0; *pp = p; + return -1; + } + + v = atof(q); + RELEASE(q); + + q = parse_c_ident(&p, endptr); + if (q) { + char *qq = q; + if (strlen(q) > strlen("true") && + !memcmp(q, "true", strlen("true"))) { + u /= mag != 0.0 ? mag : 1.0; /* inverse magnify */ + q += strlen("true"); + } + for (k = 0; _ukeys[k] && strcmp(_ukeys[k], q); k++); + switch (k) { + case K_UNIT__PT: u *= 72.0 / 72.27; break; + case K_UNIT__IN: u *= 72.0; break; + case K_UNIT__CM: u *= 72.0 / 2.54 ; break; + case K_UNIT__MM: u *= 72.0 / 25.4 ; break; + case K_UNIT__BP: u *= 1.0 ; break; + default: + WARN("Unknown unit of measure: %s", qq); + error = -1; + break; + } + RELEASE(qq); + } + + *vp = v * u; *pp = p; + return error; +} + + +static int +scan_special (double *wd, double *ht, double *xo, double *yo, char *lm, unsigned *minorversion, const char *buf, UNSIGNED_QUAD size) +{ + char *q; + const char *p = buf, *endptr; + int ns_pdf = 0, error = 0; + + endptr = p + size; + + skip_white(&p, endptr); + + q = parse_c_ident(&p, endptr); + if (q && !strcmp(q, "pdf")) { + skip_white(&p, endptr); + if (p < endptr && *p == ':') { + p++; + skip_white(&p, endptr); + RELEASE(q); + q = parse_c_ident(&p, endptr); ns_pdf = 1; + } + } + skip_white(&p, endptr); + + if (q) { + if (!strcmp(q, "landscape")) { + *lm = 1; + } else if (ns_pdf && !strcmp(q, "pagesize")) { + while (!error && p < endptr) { + char *kp = parse_c_ident(&p, endptr); + if (!kp) + break; + else { + skip_white(&p, endptr); + if (!strcmp(kp, "width")) { + error = read_length(wd, dvi_tell_mag(), &p, endptr); + if (!error) + *wd *= dvi_tell_mag(); + } else if (!strcmp(kp, "height")) { + error = read_length(ht, dvi_tell_mag(), &p, endptr); + if (!error) + *ht *= dvi_tell_mag(); + } else if (!strcmp(kp, "xoffset")) { + error = read_length(xo, dvi_tell_mag(), &p, endptr); + if (!error) + *xo *= dvi_tell_mag(); + } else if (!strcmp(kp, "yoffset")) { + error = read_length(yo, dvi_tell_mag(), &p, endptr); + if (!error) + *yo *= dvi_tell_mag(); + } + RELEASE(kp); + } + skip_white(&p, endptr); + } + } else if (!strcmp(q, "papersize")) { + char qchr = 0; + if (*p == '=') p++; + skip_white(&p, endptr); + if (p < endptr && (*p == '\'' || *p == '\"')) { + qchr = *p; p++; + skip_white(&p, endptr); + } + error = read_length(wd, 1.0, &p, endptr); + if (!error) { + skip_white(&p, endptr); + if (p < endptr && *p == ',') { + p++; skip_white(&p, endptr); + } + error = read_length(ht, 1.0, &p, endptr); + skip_white(&p, endptr); + } + if (!error && qchr) { /* Check if properly quoted */ + if (p >= endptr || *p != qchr) + error = -1; + } + } else if (minorversion && ns_pdf && !strcmp(q, "minorversion")) { + char *kv; + if (*p == '=') p++; + skip_white(&p, endptr); + kv = parse_float_decimal(&p, endptr); + if (kv) { + *minorversion = (unsigned)strtol(kv, NULL, 10); + RELEASE(kv); + } + } + RELEASE(q); + } + + return error; +} + + +void +dvi_scan_specials (unsigned page_no, + double *page_width, double *page_height, + double *x_offset, double *y_offset, char *landscape, + unsigned *minorversion) +{ + FILE *fp = dvi_file; + long offset; + unsigned char opcode; + + if (page_no >= num_pages) + ERROR("Invalid page number: %u", page_no); + offset = page_loc[page_no]; + + seek_absolute(fp, offset); + while ((opcode = fgetc(fp)) != EOP) { + + if (opcode <= SET_CHAR_127 || + (opcode >= FNT_NUM_0 && opcode <= FNT_NUM_63)) + continue; + else if (opcode == XXX1 || opcode == XXX2 || + opcode == XXX3 || opcode == XXX4) { + UNSIGNED_QUAD size = 0UL; + char buf[1024]; + switch (opcode) { + case XXX1: size = get_unsigned_byte(fp); break; + case XXX2: size = get_unsigned_pair(fp); break; + case XXX3: size = get_unsigned_triple(fp); break; + case XXX4: size = get_unsigned_quad(fp); break; + } + size = MIN(size, 1024); + if (fread(buf, sizeof(char), size, fp) != size) + ERROR("Reading DVI file failed!"); + scan_special(page_width, page_height, x_offset, y_offset, landscape, minorversion, buf, size); + continue; + } + + /* Skipping... */ + switch (opcode) { + case BOP: + seek_relative(fp, 44); + break; + case NOP: case PUSH: case POP: + case W0: case X0: case Y0: case Z0: + break; + case SET1: case PUT1: case RIGHT1: case DOWN1: + case W1: case X1: case Y1: case Z1: case FNT1: + get_unsigned_byte(fp); + break; + + case SET2: case PUT2: case RIGHT2: case DOWN2: + case W2: case X2: case Y2: case Z2: case FNT2: + get_signed_pair(fp); + break; + + case SET3: case PUT3: case RIGHT3: case DOWN3: + case W3: case X3: case Y3: case Z3: case FNT3: + get_signed_triple(fp); + break; + + case SET4: case PUT4: case RIGHT4: case DOWN4: + case W4: case X4: case Y4: case Z4: case FNT4: + get_signed_quad(fp); + break; + + case SET_RULE: case PUT_RULE: + seek_relative(fp, 8); + break; + + case FNT_DEF1: do_fntdef1(); break; + case FNT_DEF2: do_fntdef2(); break; + case FNT_DEF3: do_fntdef3(); break; + case FNT_DEF4: do_fntdef4(); break; + + case DIR: + get_unsigned_byte(fp); + break; + + default: /* case PRE: case POST: case POST_POST: and others */ + ERROR("Unexpected opcode %d at pos=0x%x", opcode, tell_position(fp)); + break; + } + } + + return; +} + |