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/*  This file is part of the program psim.

    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>

    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.

    */

/* Read a table, line by line, from a file.

   A table line has several forms:

   Field line:

       <text> { ":" <text> }

       type == table_colon_entry

       Fields points to a NULL terminated list of pointers.

   Tab indented block:

     <tab> <text> <nl> { <tab> <text> <nl> }

     type == table_code_entry

     The leading tab at the start of each line is discarded.

     fields[i] is the i'th line with the <nl> discarded.

   Code block:

     "{" <ignore-text> <nl> { <text> <nl> } "}" <ignore-text> <nl>

     type == table_code_entry

     The leading/trailing {/} lines are discarded.

     Lines containing two leading spaces have those spaces striped.

     fields[i] is the i'th line with the <nl> discarded.

   In addition, the table parser reconises and handles internally the

   following (when not in a code block):

     "#" <line-nr> '"' <file> '"'

     As per CPP/CC, treat following lines as if they were taken from

     <file> starting at <line-nr>

   No support for CPP's "#if/#else/#endif" style conditions are

   planned. */

typedef struct _table table;

typedef enum {

  table_colon_entry,

  table_code_entry,

} table_entry_type;

typedef struct _table_entry table_entry;

struct _table_entry {

  table *file;

  line_ref *line;

  table_entry_type type;

  int nr_fields;

  char **field;

};

/* List of directories to search when opening a pushed file.  Current

   directory is always searched first */

typedef struct _table_include table_include;

struct _table_include {

  char *dir;

  table_include *next;

};

/* Open/read a table file.  Since the file is read once during open

   (and then closed immediatly) there is no close method. */

extern table *table_open

(const char *file_name);

extern table_entry *table_read

(table *file);

/* Push the the state of the current file and open FILE_NAME.  When

   the end of FILE_NAME is reached, return to the pushed file */

extern void table_push

(table *file,

 line_ref *line,

 table_include *search,

 const char *file_name);

/* Expand the specified field_nr using the internal expansion table.

   A field is only expanded when explicitly specified.  */

extern void table_expand_field

(table_entry *entry,

 int field_nr);

/* Given a code entry, write the code to FILE.  Since any

   leading/trailing braces were striped as part of the read, they are

   not written. */

extern void table_print_code

(lf *file,

 table_entry *entry);

/* Debugging */

extern void dump_line_ref

(lf *file,

 char *prefix,

 const line_ref *line,

 char *suffix);

extern void dump_table_entry

(lf *file,

 char *prefix,

 const table_entry *entry,

 char *suffix);

/* Utilities for skipping around text */

extern char *skip_digits

(char *chp);

extern char *skip_spaces

(char *chp);

extern char *skip_to_separator

(char *chp,

 char *separators);

extern char *back_spaces

(char *start,

 char *chp);