156 lines
3.6 KiB
C
156 lines
3.6 KiB
C
/* This file is part of the program psim.
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Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* Read a table, line by line, from a file.
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A table line has several forms:
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Field line:
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<text> { ":" <text> }
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type == table_colon_entry
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Fields points to a NULL terminated list of pointers.
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Tab indented block:
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<tab> <text> <nl> { <tab> <text> <nl> }
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type == table_code_entry
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The leading tab at the start of each line is discarded.
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fields[i] is the i'th line with the <nl> discarded.
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Code block:
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"{" <ignore-text> <nl> { <text> <nl> } "}" <ignore-text> <nl>
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type == table_code_entry
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The leading/trailing {/} lines are discarded.
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Lines containing two leading spaces have those spaces striped.
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fields[i] is the i'th line with the <nl> discarded.
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In addition, the table parser reconises and handles internally the
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following (when not in a code block):
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"#" <line-nr> '"' <file> '"'
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As per CPP/CC, treat following lines as if they were taken from
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<file> starting at <line-nr>
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No support for CPP's "#if/#else/#endif" style conditions are
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planned. */
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typedef struct _table table;
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typedef enum {
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table_colon_entry,
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table_code_entry,
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} table_entry_type;
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typedef struct _table_entry table_entry;
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struct _table_entry {
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table *file;
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line_ref *line;
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table_entry_type type;
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int nr_fields;
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char **field;
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};
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/* List of directories to search when opening a pushed file. Current
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directory is always searched first */
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typedef struct _table_include table_include;
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struct _table_include {
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char *dir;
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table_include *next;
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};
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/* Open/read a table file. Since the file is read once during open
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(and then closed immediatly) there is no close method. */
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extern table *table_open
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(const char *file_name);
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extern table_entry *table_read
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(table *file);
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/* Push the the state of the current file and open FILE_NAME. When
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the end of FILE_NAME is reached, return to the pushed file */
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extern void table_push
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(table *file,
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line_ref *line,
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table_include *search,
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const char *file_name);
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/* Expand the specified field_nr using the internal expansion table.
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A field is only expanded when explicitly specified. */
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extern void table_expand_field
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(table_entry *entry,
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int field_nr);
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/* Given a code entry, write the code to FILE. Since any
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leading/trailing braces were striped as part of the read, they are
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not written. */
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extern void table_print_code
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(lf *file,
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table_entry *entry);
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/* Debugging */
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extern void dump_line_ref
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(lf *file,
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char *prefix,
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const line_ref *line,
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char *suffix);
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extern void dump_table_entry
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(lf *file,
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char *prefix,
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const table_entry *entry,
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char *suffix);
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/* Utilities for skipping around text */
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extern char *skip_digits
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(char *chp);
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extern char *skip_spaces
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(char *chp);
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extern char *skip_to_separator
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(char *chp,
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char *separators);
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extern char *back_spaces
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(char *start,
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char *chp);
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