/*  $Header: /home/cvsroot/dvipdfmx/src/fontmap.c,v 1.33 2005/07/30 11:44:18 hirata 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 "system.h"
#include "mem.h"
#include "error.h"

#include "dpxfile.h"
#include "dpxutil.h"

#include "subfont.h"

#include "fontmap.h"

/* CIDFont */
static char *strip_options (const char *map_name, fontmap_opt *opt);

static int verbose = 0;
void
pdf_fontmap_set_verbose (void)
{
  verbose++;
}


void
pdf_init_fontmap_record (fontmap_rec *mrec) 
{
  ASSERT(mrec);

  mrec->map_name   = NULL;

  /* SFD char mapping */
  mrec->charmap.sfd_name   = NULL;
  mrec->charmap.subfont_id = NULL;
  /* for OFM */
  mrec->opt.mapc   = -1; /* compatibility */

  mrec->font_name  = NULL;
  mrec->enc_name   = NULL;

  mrec->opt.slant  = 0.0;
  mrec->opt.extend = 1.0;
  mrec->opt.bold   = 0.0;

  mrec->opt.flags  = 0;

  mrec->opt.design_size = -1.0;

  mrec->opt.tounicode = NULL;
  mrec->opt.otl_tags  = NULL; /* deactivated */
  mrec->opt.index     = 0;
  mrec->opt.charcoll  = NULL;
  mrec->opt.style     = FONTMAP_STYLE_NONE;
}

void
pdf_clear_fontmap_record (fontmap_rec *mrec)
{
  ASSERT(mrec);

  if (mrec->map_name)
    RELEASE(mrec->map_name);
  if (mrec->charmap.sfd_name)
    RELEASE(mrec->charmap.sfd_name);
  if (mrec->charmap.subfont_id)
    RELEASE(mrec->charmap.subfont_id);
  if (mrec->enc_name)
    RELEASE(mrec->enc_name);
  if (mrec->font_name)
    RELEASE(mrec->font_name);

  if (mrec->opt.tounicode)
    RELEASE(mrec->opt.tounicode);
  if (mrec->opt.otl_tags)
    RELEASE(mrec->opt.otl_tags);
  if (mrec->opt.charcoll)
    RELEASE(mrec->opt.charcoll);
  pdf_init_fontmap_record(mrec);
}

/* strdup: just returns NULL for NULL */
static char *
mstrdup (const char *s)
{
  char  *r;
  if (!s)
    return  NULL;
  r = NEW(strlen(s) + 1, char);
  strcpy(r, s);
  return  r;
}

static void
pdf_copy_fontmap_record (fontmap_rec *dst, const fontmap_rec *src)
{
  ASSERT( dst && src );

  dst->map_name   = mstrdup(src->map_name);

  dst->charmap.sfd_name   = mstrdup(src->charmap.sfd_name);
  dst->charmap.subfont_id = mstrdup(src->charmap.subfont_id);

  dst->font_name  = mstrdup(src->font_name);
  dst->enc_name   = mstrdup(src->enc_name);

  dst->opt.slant  = src->opt.slant;
  dst->opt.extend = src->opt.extend;
  dst->opt.bold   = src->opt.bold;

  dst->opt.flags  = src->opt.flags;
  dst->opt.mapc   = src->opt.mapc;

  dst->opt.tounicode = mstrdup(src->opt.tounicode);
  dst->opt.otl_tags  = mstrdup(src->opt.otl_tags);
  dst->opt.index     = src->opt.index;
  dst->opt.charcoll  = mstrdup(src->opt.charcoll);
  dst->opt.style     = src->opt.style;
}


static void
hval_free (void *vp)
{
  fontmap_rec *mrec = (fontmap_rec *) vp;
  pdf_clear_fontmap_record(mrec);
  RELEASE(mrec);
}


static void
fill_in_defaults (fontmap_rec *mrec, const char *tex_name)
{
  if (mrec->enc_name &&
      (!strcmp(mrec->enc_name, "default") ||
       !strcmp(mrec->enc_name, "none"))) {
    RELEASE(mrec->enc_name);
    mrec->enc_name = NULL;
  }
  if (mrec->font_name && 
      (!strcmp(mrec->font_name, "default") ||
       !strcmp(mrec->font_name, "none"))) {
    RELEASE(mrec->font_name);
    mrec->font_name = NULL;
  }
  /* We *must* fill font_name either explicitly or by default */
  if (!mrec->font_name) {
    mrec->font_name = NEW(strlen(tex_name)+1, char);
    strcpy(mrec->font_name, tex_name);
  }

  mrec->map_name = NEW(strlen(tex_name)+1, char);
  strcpy(mrec->map_name, tex_name);

#ifndef WITHOUT_COMPAT
  /* Use "UCS" character collection for Unicode SFD
   * and Identity CMap combination. For backward
   * compatibility.
   */
  if (mrec->charmap.sfd_name && mrec->enc_name &&
      !mrec->opt.charcoll) {
    if ((!strcmp(mrec->enc_name, "Identity-H") ||
         !strcmp(mrec->enc_name, "Identity-V"))
          &&
         (strstr(mrec->charmap.sfd_name, "Uni")  ||
          strstr(mrec->charmap.sfd_name, "UBig") ||
          strstr(mrec->charmap.sfd_name, "UBg")  ||
          strstr(mrec->charmap.sfd_name, "UGB")  ||
          strstr(mrec->charmap.sfd_name, "UKS")  ||
          strstr(mrec->charmap.sfd_name, "UJIS"))) {
      mrec->opt.charcoll = NEW(strlen("UCS")+1, char);
      strcpy(mrec->opt.charcoll, "UCS");
    }
  }
#endif /* WITHOUT_COMPAT */

  return;
}

static char *
readline (char *buf, int buf_len, FILE *fp)
{
  char  *p, *q;
  ASSERT( buf && buf_len > 0 && fp );
  p = mfgets(buf, buf_len, fp);
  if (!p)
    return  NULL;
  q = strchr(p, '%'); /* we don't have quoted string */
  if (q)
    *q = '\0';
  return  p;
}

#ifndef ISBLANK
#  define ISBLANK(c) ((c) == ' ' || (c) == '\t')
#endif
static void
skip_blank (char **pp, char *endptr)
{
  char  *p = *pp;
  if (!p || p >= endptr)
    return;
  for ( ; p < endptr && ISBLANK(*p); p++);
  *pp = p;
}

static char *
parse_string_value (char **pp, char *endptr)
{
  char  *q = NULL, *p = *pp;
  int    n;

  if (!p || p >= endptr)
    return  NULL;
  if (*p == '"')
    q = parse_c_string(&p, endptr);
  else {
    for (n = 0; p < endptr && !isspace(*p); p++, n++);
    if (n == 0)
      return  NULL;
    q = NEW(n + 1, char);
    memcpy(q, *pp, n); q[n] = '\0';
  }

  *pp = p;
  return  q;
}

/* no preceeding spaces allowed */
static char *
parse_integer_value (char **pp, char *endptr, int base)
{
  char  *q, *p = *pp;
  int    has_sign = 0, has_prefix = 0, n;

  ASSERT( base == 0 || (base >= 2 && base <= 36) );

  if (!p || p >= endptr)
    return  NULL;

  if (*p == '-' || *p == '+') {
    p++; has_sign = 1;
  }
  if ((base == 0 || base == 16) &&
      p + 2 <= endptr &&
      p[0] == '0' && p[1] == 'x') {
    p += 2; has_prefix = 1;
  }
  if (base == 0) {
    if (has_prefix)
      base = 16;
    else if (p < endptr && *p == '0')
      base = 8;
    else {
      base = 10;
    }
  }
#define ISDIGIT_WB(c,b) ( \
  ((b) <= 10 && (c) >= '0' && (c) < '0' + (b)) || \
  ((b) >  10 && ( \
      ((c) >= '0' && (c) <= '9') || \
      ((c) >= 'a' && (c) < 'a' + ((b) - 10)) || \
      ((c) >= 'A' && (c) < 'A' + ((b) - 10)) \
    ) \
  ) \
)
  for (n = 0; p < endptr && ISDIGIT_WB(*p, base); p++, n++);
  if (n == 0)
    return  NULL;
  if (has_sign)
    n += 1;
  if (has_prefix)
    n += 2;

  q = NEW(n + 1, char);
  memcpy(q, *pp, n); q[n] = '\0';

  *pp = p;
  return  q;
}

static int
fontmap_parse_mapdef (fontmap_rec *mrec,
                      const char *mapdef, char *endptr)
{
  char  *p = (char *) mapdef;

  /*
   * Parse record line in map file.  First two fields (after TeX font
   * name) are position specific.  Arguments start at the first token
   * beginning with a  '-'.
   *
   * NOTE:
   *   Dvipdfm basically uses parse_ident() for parsing enc_name,
   *   font_name, and other string values which assumes PostScript-like
   *   syntax.
   *   skip_white() skips '\r' and '\n' but they should terminate
   *   fontmap line here.
   */

  skip_blank(&p, endptr);
  /* encoding field */
  if (p < endptr && *p != '-') { /* May be NULL */
    mrec->enc_name = parse_string_value(&p, endptr);
    skip_blank(&p, endptr);
  }

  /* fontname or font filename field */
  if (p < endptr && *p != '-') { /* May be NULL */
    mrec->font_name = parse_string_value(&p, endptr);
    skip_blank(&p, endptr);
  }
  if (mrec->font_name) {
    char  *tmp;
    /* Several options are encoded in font_name for
     * compatibility with dvipdfm.
     */
    tmp = strip_options(mrec->font_name, &mrec->opt);
    if (tmp) {
      RELEASE(mrec->font_name);
      mrec->font_name = tmp;
    }
  }

  skip_blank(&p, endptr);
  /* Parse any remaining arguments */
  while (p + 1 < endptr &&
         *p != '\r' && *p != '\n' && *p == '-') {
    char  *q, mopt = p[1];
    long   v;

    p += 2; skip_blank(&p, endptr);
    switch (mopt) {

    case  's': /* Slant option */
      q = parse_float_decimal(&p, endptr);
      if (!q) {
        WARN("Missing a number value for 's' option.");
        return  -1;
      }
      mrec->opt.slant = atof(q);
      RELEASE(q);
      break;
    case  'e': /* Extend option */
      q = parse_float_decimal(&p, endptr);
      if (!q) {
        WARN("Missing a number value for 'e' option.");
        return  -1;
      }
      mrec->opt.extend = atof(q);
      if (mrec->opt.extend <= 0.0) {
        WARN("Invalid value for 'e' option: %s", q);
        return  -1;
      }
      RELEASE(q);
      break;
    case  'b': /* Fake-bold option */
      q = parse_float_decimal(&p, endptr);
      if (!q) {
        WARN("Missing a number value for 'b' option.");
        return  -1;
      }
      mrec->opt.bold = atof(q);
      if (mrec->opt.bold <= 0.0) {
        WARN("Invalid value for 'b' option: %s", q);
        return  -1;
      }
      RELEASE(q);
      break;

    case  'r': /* Remap option */
      mrec->opt.flags |= FONTMAP_OPT_REMAP;
      break;

#if  1
    case  'i':  /* TTC index */
      q = parse_integer_value(&p, endptr, 10);
      if (!q) {
        WARN("Missing TTC index number...");
        return  -1;
      }
      mrec->opt.index = atoi(q);
      if (mrec->opt.index < 0) {
        WARN("Invalid TTC index number: %s", q);
        return  -1;
      }
      RELEASE(q);
      break;

    case  'p': /* UCS plane: just for testing */
      q = parse_integer_value(&p, endptr, 0);
      if (!q) {
        WARN("Missing a number for 'p' option.");
        return  -1;
      }
      v = strtol(q, NULL, 0);
      if (v < 0 || v > 16)
        WARN("Invalid valur for option 'p': %s", q);
      else {
        mrec->opt.mapc |= v << 16;
      }
      RELEASE(q);
      break;

    case  'u': /* ToUnicode */
      q = parse_string_value(&p, endptr);
      if (q)
        mrec->opt.tounicode = q;
      else {
        WARN("Missing string value for option 'u'.");
        return  -1;
      }
      break;
#endif

    /* Omega uses both single-byte and double-byte set_char command
     * even for double-byte OFMs. This confuses CMap decoder.
     */
    case  'm':
      /* Map single bytes char 0xab to double byte char 0xcdab  */
      if (p + 4 <= endptr &&
          p[0] == '<' && p[3] == '>') {
        p++;
        q = parse_integer_value(&p, endptr, 16);
        if (!q) {
          WARN("Invalid value for option 'm'.");
          return  -1;
        } else if (p < endptr && *p != '>') {
          WARN("Invalid value for option 'm': %s", q);
          RELEASE(q);
          return  -1;
        }
        v = strtol(q, NULL, 16);
        mrec->opt.mapc = ((v << 8) & 0x0000ff00L);
        RELEASE(q); p++;
      } else if (p + 4 <= endptr &&
                 !memcmp(p, "sfd:", strlen("sfd:"))) {
        char  *r;
        /* SFD mapping: sfd:Big5,00 */
        p += 4; skip_blank(&p, endptr);
        q  = parse_string_value(&p, endptr);
        if (!q) {
          WARN("Missing value for option 'm'.");
          return  -1;
        }
        r  = strchr(q, ',');
        if (!r) {
          WARN("Invalid value for option 'm': %s", q);
          RELEASE(q);
          return  -1;
        }
        *r = 0; r++; skip_blank(&r, r + strlen(r));
        if (*r == '\0') {
          WARN("Invalid value for option 'm': %s,", q);
          RELEASE(q);
          return  -1;
        }
        mrec->charmap.sfd_name   = mstrdup(q);
        mrec->charmap.subfont_id = mstrdup(r);
        RELEASE(q);
      } else if (p + 4 < endptr &&
                 !memcmp(p, "pad:", strlen("pad:"))) {
        p += 4; skip_blank(&p, endptr);
        q  = parse_integer_value(&p, endptr, 16);
        if (!q) {
          WARN("Invalid value for option 'm'.");
          return  -1;
        } else if (p < endptr && !isspace(*p)) {
          WARN("Invalid value for option 'm': %s", q);
          RELEASE(q);
          return  -1;
        }
        v = strtol(q, NULL, 16);
        mrec->opt.mapc = ((v << 8) & 0x0000ff00L);
        RELEASE(q);
      } else {
        WARN("Invalid value for option 'm'.");
        return  -1;
      }
      break;

#if  1
    case 'w': /* Writing mode (for unicode encoding) */
      if (!mrec->enc_name ||
           strcmp(mrec->enc_name, "unicode")) {
        WARN("Fontmap option 'w' meaningless for encoding other than \"unicode\".");
        return  -1;
      }
      q  = parse_integer_value(&p, endptr, 10);
      if (!q) {
        WARN("Missing wmode value...");
        return  -1;
      }
      if (atoi(q) == 1)
        mrec->opt.flags |= FONTMAP_OPT_VERT;
      else if (atoi(q) == 0)
        mrec->opt.flags &= ~FONTMAP_OPT_VERT;
      else {
        WARN("Invalid value for option 'w': %s", q);
      }
      RELEASE(q);
      break;
#endif

    default:
      WARN("Unrecognized font map option: '%c'", mopt);
      return  -1;
      break;
    }
    skip_blank(&p, endptr);
  }

  if (p < endptr && *p != '\r' && *p != '\n') {
    WARN("Invalid char in fontmap line: %c", *p);
    return  -1;
  }

  return  0;
}



static struct ht_table *fontmap = NULL;

#define fontmap_invalid(m) (!(m) || !(m)->map_name || !(m)->font_name)
static char *
chop_sfd_name (const char *tex_name, char **sfd_name)
{
  char  *fontname;
  char  *p, *q;
  int    m, n, len;

  *sfd_name = NULL;

  p = strchr((char *) tex_name, '@');
  if (!p ||
      p[1] == '\0' || p == tex_name) {
    return  NULL;
  }
  m = (int) (p - tex_name);
  p++;
  q = strchr(p, '@');
  if (!q || q == p) {
    return NULL;
  }
  n = (int) (q - p);
  q++;

  len = strlen(tex_name) - n;
  fontname = NEW(len+1, char);
  memcpy(fontname, tex_name, m);
  fontname[m] = '\0';
  if (*q)
    strcat(fontname, q);

  *sfd_name = NEW(n+1, char);
  memcpy(*sfd_name, p, n);
  (*sfd_name)[n] = '\0';

  return  fontname;
}

static char *
make_subfont_name (const char *map_name, const char *sfd_name, const char *sub_id)
{
  char  *tfm_name;
  int    n, m;
  char  *p, *q;

  p = strchr(map_name, '@');
  if (!p || p == map_name)
    return  NULL;
  m = (int) (p - map_name);
  q = strchr(p + 1, '@');
  if (!q || q == p + 1)
    return  NULL;
  n = (int) (q - p) + 1; /* including two '@' */
  if (strlen(sfd_name) != n - 2 ||
      memcmp(p + 1, sfd_name, n - 2))
    return  NULL;
  tfm_name = NEW(strlen(map_name) - n + strlen(sub_id) + 1, char);
  memcpy(tfm_name, map_name, m);
  tfm_name[m] = '\0';
  strcat(tfm_name, sub_id);
  if (q[1]) /* not ending with '@' */
    strcat(tfm_name, q + 1);

  return  tfm_name;
}

/* "foo@A@ ..." is expanded to
 *   fooab ... -m sfd:A,ab
 *   ...
 *   fooyz ... -m sfd:A,yz
 * where 'ab' ... 'yz' is subfont IDs in SFD 'A'.
 */
int
pdf_append_fontmap_record (const char *kp, const fontmap_rec *vp)
{
  fontmap_rec *mrec;
  char        *fnt_name, *sfd_name = NULL;

  if (!kp || fontmap_invalid(vp)) {
    WARN("Invalid fontmap record...");
    return -1;
  }

  if (verbose > 3)
    MESG("fontmap>> append key=\"%s\"...", kp);

  fnt_name = chop_sfd_name(kp, &sfd_name);
  if (fnt_name && sfd_name) {
    char  *tfm_name;
    char **subfont_ids;
    int    n = 0;
    subfont_ids = sfd_get_subfont_ids(sfd_name, &n);
    if (!subfont_ids)
      return  -1;
    while (n-- > 0) {
      tfm_name = make_subfont_name(kp, sfd_name, subfont_ids[n]);
      if (!tfm_name)
        continue;
      mrec = ht_lookup_table(fontmap, tfm_name, strlen(tfm_name));
      if (!mrec) {
        mrec = NEW(1, fontmap_rec);
        pdf_init_fontmap_record(mrec);
        mrec->map_name = mstrdup(kp); /* link */
        mrec->charmap.sfd_name   = mstrdup(sfd_name);
        mrec->charmap.subfont_id = mstrdup(subfont_ids[n]);
        ht_insert_table(fontmap, tfm_name, strlen(tfm_name), mrec, hval_free);
      }
      RELEASE(tfm_name);
    }
    RELEASE(fnt_name);
    RELEASE(sfd_name);
  }

  mrec = ht_lookup_table(fontmap, kp, strlen(kp));
  if (!mrec) {
    mrec = NEW(1, fontmap_rec);
    pdf_copy_fontmap_record(mrec, vp);
    if (mrec->map_name && !strcmp(kp, mrec->map_name)) {
      RELEASE(mrec->map_name);
      mrec->map_name = NULL;
    }
    ht_insert_table(fontmap, kp, strlen(kp), mrec, hval_free);
  }
  if (verbose > 3)
    MESG("\n");

  return  0;
}

int
pdf_remove_fontmap_record (const char *kp)
{
  char  *fnt_name, *sfd_name = NULL;

  if (!kp)
    return  -1;

  if (verbose > 3)
    MESG("fontmap>> remove key=\"%s\"...", kp);

  fnt_name = chop_sfd_name(kp, &sfd_name);
  if (fnt_name && sfd_name) {
    char  *tfm_name;
    char **subfont_ids;
    int    n = 0;
    subfont_ids = sfd_get_subfont_ids(sfd_name, &n);
    if (!subfont_ids)
      return  -1;
    if (verbose > 3)
      MESG("\nfontmap>> Expand @%s@:", sfd_name);
    while (n-- > 0) {
      tfm_name = make_subfont_name(kp, sfd_name, subfont_ids[n]);
      if (!tfm_name)
        continue;
      if (verbose > 3)
        MESG(" %s", tfm_name);
      ht_remove_table(fontmap, tfm_name, strlen(tfm_name), hval_free);
      RELEASE(tfm_name);
    }
    RELEASE(fnt_name);
    RELEASE(sfd_name);
  }

  ht_remove_table(fontmap, kp, strlen(kp), hval_free);

  if (verbose > 3)
    MESG("\n");

  return  0;
}

int
pdf_insert_fontmap_record (const char *kp, const fontmap_rec *vp)
{
  fontmap_rec *mrec;
  char        *fnt_name, *sfd_name;

  if (!kp || fontmap_invalid(vp)) {
    WARN("Invalid fontmap record...");
    return -1;
  }

  if (verbose > 3)
    MESG("fontmap>> insert key=\"%s\"...", kp);

  fnt_name = chop_sfd_name(kp, &sfd_name);
  if (fnt_name && sfd_name) {
    char  *tfm_name;
    char **subfont_ids;
    int    n = 0;
    subfont_ids = sfd_get_subfont_ids(sfd_name, &n);
    if (!subfont_ids)
      return  -1;
    if (verbose > 3)
      MESG("\nfontmap>> Expand @%s@:", sfd_name);
    while (n-- > 0) {
      tfm_name = make_subfont_name(kp, sfd_name, subfont_ids[n]);
      if (!tfm_name)
        continue;
      if (verbose > 3)
        MESG(" %s", tfm_name);
      mrec = NEW(1, fontmap_rec);
      pdf_init_fontmap_record(mrec);
      mrec->map_name = mstrdup(kp); /* link to this entry */
      mrec->charmap.sfd_name   = mstrdup(sfd_name);
      mrec->charmap.subfont_id = mstrdup(subfont_ids[n]);
      ht_insert_table(fontmap, tfm_name, strlen(tfm_name), mrec, hval_free);
      RELEASE(tfm_name);
    }
    RELEASE(fnt_name);
    RELEASE(sfd_name);
  }

  mrec = NEW(1, fontmap_rec);
  pdf_copy_fontmap_record(mrec, vp);
  if (mrec->map_name && !strcmp(kp, mrec->map_name)) {
    RELEASE(mrec->map_name);
    mrec->map_name = NULL;
  }
  ht_insert_table(fontmap, kp, strlen(kp), mrec, hval_free);

  if (verbose > 3)
    MESG("\n");

  return  0;
}


int
pdf_read_fontmap_line (fontmap_rec *mrec, const char *mline, long mline_len)
{
  int    error;
  char  *q, *p, *endptr;


  ASSERT(mrec);

  p      = (char *) mline;
  endptr = p + mline_len;

  skip_blank(&p, endptr);
  if (p >= endptr)
    return -1;

  q = parse_string_value(&p, endptr);
  if (!q)
    return -1;

  error = fontmap_parse_mapdef(mrec, p, endptr);
  if (!error) {
    char  *fnt_name, *sfd_name = NULL;
    fnt_name = chop_sfd_name(q, &sfd_name);
    if (fnt_name && sfd_name) {
      if (!mrec->font_name) {
      /* In the case of subfonts, the base name (before the character '@')
       * will be used as a font_name by default.
       * Otherwise tex_name will be used as a font_name by default.
       */
        mrec->font_name = fnt_name;
      } else {
        RELEASE(fnt_name);
      }
      if (mrec->charmap.sfd_name)
        RELEASE(mrec->charmap.sfd_name);
      mrec->charmap.sfd_name = sfd_name ;
    }
    fill_in_defaults(mrec, q);
  }
  RELEASE(q);

  return  error;
}

/* Dvips format:
 *  String enclosed by '"' --> PostScript code(!)
 *  '<' or '<<' followed by *.enc, *.pfb, or *.pfa
 */
static int
is_pdfm_mapline (const char *mline) /* NULL terminated. */
{
  int    r = 1;
  char  *q, *p, *endptr;

  p      = (char *) mline;
  endptr = p + strlen(mline);

  skip_blank(&p, endptr);
  /* Break if '-' preceeded by blanks is found. */
  while (r && p < endptr && *p != '-') {
    switch (p[0]) {
    case  '"':
      q = parse_c_string(&p, endptr); /* wrong */
      if (q) {
        if (strstr(q, "SlantFont")  ||
            strstr(q, "ExtendFont") ||
            strstr(q, "ReEncodeFont")) {
          r = 0;
        }
        RELEASE(q);
      }
      break;
    case  '<':
      r = 0;
      break;
    }
    for ( ; p < endptr && !ISBLANK(*p); p++);
    skip_blank(&p, endptr);
  }

  return  r;
}

static void
delete_records (FILE *fp, long num_lines)
{
  char *q, *p;

  while (num_lines-- > 0 &&
         (p = readline(work_buffer, WORK_BUFFER_SIZE, fp)) != NULL) {
    skip_blank(&p, p + strlen(p));
    if (*p == 0)
      continue;
    q = parse_string_value(&p, p + strlen(p));
    if (q) {
      WARN("Deleting fontmap record for \"%s\"", q);
      pdf_remove_fontmap_record(q);
      RELEASE(q);
    }
  }
  return;
}

int
pdf_load_fontmap_file (const char *filename, int mode)
{
  fontmap_rec *mrec;
  FILE        *fp;
  char        *p = NULL, *endptr;
  long         llen, lpos  = 0;
  int          error = 0;

  ASSERT(filename);
  ASSERT(fontmap) ;

  if (verbose)
    MESG("<FONTMAP:%s", filename);

  fp = DPXFOPEN(filename, DPX_RES_TYPE_FONTMAP);
  if (!fp) {
    WARN("Couldn't open font map file \"%s\".", filename);
    return  -1;
  }

  while (!error &&
         (p = readline(work_buffer, WORK_BUFFER_SIZE, fp)) != NULL) {

    lpos++;
    llen   = strlen(work_buffer);
    endptr = p + llen;

    skip_blank(&p, endptr);
    if (p == endptr)
      continue;

    if (!is_pdfm_mapline(p)) {
      WARN("This .map file looks like a dvips format fotmap file.");
      WARN("-- Current input buffer is: %s", p);
      WARN("-- Reading fontmap file stopped at: file=\"%s\", line=%d.",
           filename, lpos);
      rewind(fp);
      delete_records(fp, lpos - 1);
      break;
    }

    mrec  = NEW(1, fontmap_rec);
    pdf_init_fontmap_record(mrec);
    error = pdf_read_fontmap_line(mrec, p, llen);
    if (error) {
      WARN("Invalid map record in fontmap file.");
      WARN("-- Current input buffer is: %s", p);
      WARN("-- Reading fontmap file stopped at: file=\"%s\", line=%d.",
           filename, lpos);
      rewind(fp);
      delete_records(fp, lpos - 1);
    } else {
      switch (mode) {
      case FONTMAP_RMODE_REPLACE:
        pdf_insert_fontmap_record(mrec->map_name, mrec);
        break;
      case FONTMAP_RMODE_APPEND:
        pdf_append_fontmap_record(mrec->map_name, mrec);
        break;
      case FONTMAP_RMODE_REMOVE:
        pdf_remove_fontmap_record(mrec->map_name);
        break;
      }
    }
    pdf_clear_fontmap_record(mrec);
    RELEASE(mrec);
  }
  DPXFCLOSE(fp);

  if (verbose)
    MESG(">");

  return  error;
}

#if  0
/* tfm_name="dmjhira10", map_name="dmj@DNP@10", sfd_name="DNP"
 *  --> sub_id="hira"
 * Test if tfm_name can be really considered as subfont.
 */
static int
test_subfont (const char *tfm_name, const char *map_name, const char *sfd_name)
{
  int    r = 0;
  char **ids;
  int    n, m;
  char  *p = (char *) map_name;
  char  *q = (char *) tfm_name;

  ASSERT( tfm_name && map_name && sfd_name );

  /* until first occurence of '@' */
  for ( ; *p && *q && *p == *q && *p != '@'; p++, q++);
  if (*p != '@')
    return  0;
  p++;
  /* compare sfd_name (should be always true here) */
  if (strlen(p) <= strlen(sfd_name) ||
      memcmp(p, sfd_name, strlen(sfd_name)) ||
      p[strlen(sfd_name)] != '@')
    return  0;
  /* check tfm_name follows second '@' */
  p += strlen(sfd_name) + 1;
  if (*p) {
    char  *r = (char *) tfm_name;
    r += strlen(tfm_name) - strlen(p);
    if (strcmp(r, p))
      return  0;
  }
  /* Now 'p' is located at next to SFD name terminator
   * (second '@') in map_name and 'q' is at first char
   * of subfont_id substring in tfm_name.
   */
  n  = strlen(q) - strlen(p); /* length of subfont_id string */
  if (n <= 0)
    return  0;
  /* check if n-length substring 'q' is valid as subfont ID */
  ids = sfd_get_subfont_ids(sfd_name, &m);
  if (!ids)
    return  0;
  while (!r && m-- > 0) {
    if (strlen(ids[m]) == n &&
        !memcmp(q, ids[m], n)) {
      r = 1;
    }
  }

  return  r;
}
#endif  /* 0 */


fontmap_rec *
pdf_lookup_fontmap_record (const char *tfm_name)
{
  fontmap_rec *mrec = NULL;

  if (fontmap && tfm_name)
    mrec = ht_lookup_table(fontmap, tfm_name, strlen(tfm_name));

  return  mrec;
}


void
pdf_init_fontmaps (void)
{
  fontmap = NEW(1, struct ht_table);
  ht_init_table(fontmap);
}

void
pdf_close_fontmaps (void)
{
  if (fontmap) {
    ht_clear_table(fontmap, hval_free);
    RELEASE(fontmap);
  }
  fontmap = NULL;
}

void
pdf_clear_fontmaps (void)
{
  pdf_close_fontmaps();
  pdf_init_fontmaps();
}

/* CIDFont options
 *
 * FORMAT:
 *
 *   (:int:)?!?string(/string)?(,string)?
 */

static char *
substr (char **str, char stop)
{
  char *sstr, *endptr;

  endptr = strchr(*str, stop);
  if (!endptr || endptr == *str)
    return NULL;
  sstr = NEW(endptr-(*str)+1, char);
  memcpy(sstr, *str, endptr-(*str));
  sstr[endptr-(*str)] = '\0';

  *str = endptr+1;
  return sstr;
}

#include <ctype.h>
#define CID_MAPREC_CSI_DELIM '/'

static char *
strip_options (const char *map_name, fontmap_opt *opt)
{
  char *font_name;
  char *p, *next = NULL;
  int   have_csi = 0, have_style = 0;

  ASSERT(opt);

  p = (char *) map_name;
  font_name      = NULL;
  opt->charcoll  = NULL;
  opt->index     = 0;
  opt->style     = FONTMAP_STYLE_NONE;
  opt->flags     = 0;

  if (*p == ':' && isdigit(*(p+1))) {
    opt->index = (int) strtoul(p+1, &next, 10);
    if (*next == ':')
      p = next + 1;
    else {
      opt->index = 0;
    }
  }
  if (*p == '!') { /* no-embedding */
    if (*(++p) == '\0')
      ERROR("Invalid map record: %s (--> %s)", map_name, p);
    opt->flags |= FONTMAP_OPT_NOEMBED;
  }

  if ((next = strchr(p, CID_MAPREC_CSI_DELIM)) != NULL) {
    if (next == p)
      ERROR("Invalid map record: %s (--> %s)", map_name, p);
    font_name = substr(&p, CID_MAPREC_CSI_DELIM);
    have_csi  = 1;
  } else if ((next = strchr(p, ',')) != NULL) {
    if (next == p)
      ERROR("Invalid map record: %s (--> %s)", map_name, p);
    font_name = substr(&p, ',');
    have_style = 1;
  } else {
    font_name = NEW(strlen(p)+1, char);
    strcpy(font_name, p);
  }

  if (have_csi) {
    if ((next = strchr(p, ',')) != NULL) {
      opt->charcoll = substr(&p, ',');
      have_style = 1;
    } else if (p[0] == '\0') {
      ERROR("Invalid map record: %s.", map_name);
    } else {
      opt->charcoll = NEW(strlen(p)+1, char);
      strcpy(opt->charcoll, p);
    }
  }

  if (have_style) {
    if (!strncmp(p, "BoldItalic", 10)) {
      if (*(p+10))
        ERROR("Invalid map record: %s (--> %s)", map_name, p);
      opt->style = FONTMAP_STYLE_BOLDITALIC;
    } else if (!strncmp(p, "Bold", 4)) {
      if (*(p+4))
        ERROR("Invalid map record: %s (--> %s)", map_name, p);
      opt->style = FONTMAP_STYLE_BOLD;
    } else if (!strncmp(p, "Italic", 6)) {
      if (*(p+6))
        ERROR("Invalid map record: %s (--> %s)", map_name, p);
      opt->style = FONTMAP_STYLE_ITALIC;
    }
  }

  return font_name;
}

#if  DPXTEST
static void
dump_fontmap_rec (const char *key, const fontmap_rec *mrec)
{
  fontmap_opt *opt = (fontmap_opt *) &mrec->opt;

  if (mrec->map_name)
    fprintf(stdout, "  <!-- subfont");
  else
    fprintf(stdout, "  <insert");
  fprintf(stdout, " id=\"%s\"", key);
  if (mrec->map_name)
    fprintf(stdout, " map-name=\"%s\"", mrec->map_name);
  if (mrec->enc_name)
    fprintf(stdout, " enc-name=\"%s\"",  mrec->enc_name);
  if (mrec->font_name)
    fprintf(stdout, " font-name=\"%s\"", mrec->font_name);
  if (mrec->charmap.sfd_name && mrec->charmap.subfont_id) {
    fprintf(stdout, " charmap=\"sfd:%s,%s\"",
            mrec->charmap.sfd_name, mrec->charmap.subfont_id);
  }
  if (opt->slant != 0.0)
    fprintf(stdout, " font-slant=\"%g\"", opt->slant);
  if (opt->extend != 1.0)
    fprintf(stdout, " font-extend=\"%g\"", opt->extend);
  if (opt->charcoll)
    fprintf(stdout, " glyph-order=\"%s\"", opt->charcoll);
  if (opt->tounicode)
    fprintf(stdout, " tounicode=\"%s\"", opt->tounicode);
  if (opt->index != 0)
    fprintf(stdout, " ttc-index=\"%d\"", opt->index);
  if (opt->flags & FONTMAP_OPT_REMAP)
    fprintf(stdout, " remap=\"true\"");
  if (opt->flags & FONTMAP_OPT_NOEMBED)
    fprintf(stdout, " embedding=\"no\"");
  if (opt->mapc >= 0) {
    fprintf(stdout, " charmap=\"pad:");
    if (opt->mapc > 0xffff)
      fprintf(stdout, "%02x %02x", (opt->mapc >> 16) & 0xff, (opt->mapc >> 8) & 0xff);
    else
      fprintf(stdout, "%02x", (opt->mapc >> 8) & 0xff);
    fprintf(stdout, "\"");
  }
  if (opt->flags & FONTMAP_OPT_VERT)
    fprintf(stdout, " writing-mode=\"vertical\"");
  if (opt->style != FONTMAP_STYLE_NONE) {
    fprintf(stdout, " font-style=\"");
    switch (opt->style) {
    case FONTMAP_STYLE_BOLD:
      fprintf(stdout, "bold");
      break;
    case FONTMAP_STYLE_ITALIC:
      fprintf(stdout, "italic");
      break;
    case FONTMAP_STYLE_BOLDITALIC:
      fprintf(stdout, "bolditalic");
      break;
    }
    fprintf(stdout, "\"");
  }
  if (mrec->map_name)
    fprintf(stdout, " / -->\n");
  else
    fprintf(stdout, " />\n");
}

void
dump_fontmaps (void)
{
  struct ht_iter iter;
  fontmap_rec   *mrec;
  char           key[128], *kp;
  int            kl;

  if (!fontmap)
    return;

  fprintf(stdout, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
  fprintf(stdout, "<!DOCTYPE fontmap SYSTEM \"fontmap.dtd\">\n");
  fprintf(stdout, "<fontmap id=\"%s\">\n", "foo");
  if (ht_set_iter(fontmap, &iter) == 0) {
    do {
      kp   = ht_iter_getkey(&iter, &kl);
      mrec = ht_iter_getval(&iter);
      if (kl > 127)
        continue;
      memcpy(key, kp, kl); key[kl] = 0;
      dump_fontmap_rec(key, mrec);
    } while (!ht_iter_next(&iter));
  }
  ht_clear_iter(&iter);
  fprintf(stdout, "</fontmap>\n");

  return;
}

void
test_fontmap_help (void)
{
  fprintf(stdout, "usage: fontmap [options] [mapfile...]\n");
  fprintf(stdout, "-l, --lookup string\n");
  fprintf(stdout, "  Lookup fontmap entry for 'string' after loading mapfile(s).\n");
}

int
test_fontmap_main (int argc, char *argv[])
{
  int    i;
  char  *key = NULL;

  for (;;) {
    int  c, optidx = 0;
    static struct option long_options[] = {
      {"lookup", 1, 0, 'l'},
      {"help",   0, 0, 'h'},
      {0, 0, 0, 0}
    };
    c = getopt_long(argc, argv, "l:h", long_options, &optidx);
    if (c == -1)
      break;

    switch (c) {
    case  'l':
      key = optarg;
      break;
    case  'h':
      test_fontmap_help();
      return  0;
      break;
    default:
      test_fontmap_help();
      return  -1;
      break;
    }
  }

  pdf_init_fontmaps();
  for (i = optind; i < argc; i++)
    pdf_load_fontmap_file(argv[i], FONTMAP_RMODE_REPLACE);

  if (key == NULL)
    dump_fontmaps();
  else {
    fontmap_rec *mrec;
    mrec = pdf_lookup_fontmap_record(key);
    if (mrec)
      dump_fontmap_rec(key, mrec);
    else {
      WARN("Fontmap entry \"%s\" not found.", key);
    }
  }
  pdf_close_fontmaps();

  return  0;
}
#endif /* DPXTEST */
