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/*
# encoding.h: parse a font encoding (.enc) file.
#
# Copyright (C) 1992, 2011 Free Software Foundation, Inc.
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
*/
#ifndef ENCODING_H
#define ENCODING_H
#include "font.h"
#include "list.h"
#include "types.h"
/* A single character from the encoding file. Since we usually want to
deal with the entire collection of characters as a group, we don't
define any accessor macros for this structure, but rather the next. */
typedef struct
{
string name;
list_type ligature;
} encoding_char_type;
/* The size of font's encoding vector (PostScript defines this). */
#define ENCODING_VECTOR_SIZE 256
/* The collection of all the information from the file. */
typedef struct
{
string coding_scheme;
encoding_char_type encoding_char[ENCODING_VECTOR_SIZE];
} encoding_info_type;
/* The name of the encoding scheme in E_I. */
#define ENCODING_SCHEME_NAME(e_i) ((e_i).coding_scheme)
/* The Nth encoding character in E_I. */
#define ENCODING_CHAR_ELT(e_i, n) ((e_i).encoding_char[n])
/* The name of the character CODE in the encoding structure E_I, or NULL
if the character doesn't exist. */
#define ENCODING_CHAR_NAME(e_i, code) (ENCODING_CHAR_ELT (e_i, code).name)
/* The ligature table for the character code in the encoding structure
E_I. Each element of the list is a pointer to a `tfm_ligature_type'.
The list is garbage if the character doesn't exist. */
#define ENCODING_CHAR_LIG(e_i, code) (ENCODING_CHAR_ELT (e_i, code).ligature)
/* If an encoding file is mandatory for a program to operate, and the
user does not specify one, the program should use this. */
#define DEFAULT_ENCODING "ascii"
/* Returns the character code for the character named NAME in E_I, or -1
if NAME is not present or NULL. */
extern int encoding_number (encoding_info_type e_i, string name);
/* Return the basename for the encoding file in which the encoding
CODINGSCHEME can be found. Reads the library file (see `libfile.h')
`encoding.map'. Case is ignored in the comparison with
CODINGSCHEME. If CODINGSCHEME is not present in `encoding.map',
issue a warning and return some default. */
extern string coding_scheme_to_filename (string codingscheme);
/* Read the library file (see `libfile.h') `FILENAME.enc', and return
the information it contains. If the file cannot be opened, give a
fatal error. */
extern encoding_info_type read_encoding_file (string filename);
#endif /* not ENCODING_H */
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