752 lines
19 KiB
C
752 lines
19 KiB
C
/* lil-gp Genetic Programming System, version 1.0, 11 July 1995
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* Copyright (C) 1995 Michigan State University
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*
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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 version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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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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*
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Douglas Zongker (zongker@isl.cps.msu.edu)
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* Dr. Bill Punch (punch@isl.cps.msu.edu)
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*
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* Computer Science Department
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* A-714 Wells Hall
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* Michigan State University
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* East Lansing, Michigan 48824
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* USA
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*
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*/
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#include <lilgp.h>
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/** array of parameters, along with the size of the array and the number
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of parameters used. **/
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parameter *param;
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int param_size = 0, param_alloc = 0;
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/* read_parameter_file()
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*
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* reads and parses a parameter file.
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*/
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void read_parameter_file ( char *filename )
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{
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FILE *f;
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char buffer[MAXPARAMLINELENGTH+1];
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char *buf2;
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int buf2size;
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int line = 0;
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int errors = 0;
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int including = 1;
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int flag;
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int buflen, buf2len;
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int cont;
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/** open it. **/
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f = fopen ( filename, "r" );
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if ( f == NULL )
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error ( E_FATAL_ERROR, "can't open parameter file \"%s\".",
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filename );
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/** lines are read into buffer. they are appended to buf2 until a
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line which is not continued is hit, then buf2 is parsed and the
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parameter added. **/
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/* initial allocation of buf2. */
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buf2 = (char *)MALLOC ( MAXPARAMLINELENGTH * sizeof ( char ) );
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buf2size = MAXPARAMLINELENGTH;
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buf2[0] = 0;
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buf2len = 0;
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cont = 0;
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while ( fgets ( buffer, MAXPARAMLINELENGTH, f ) != NULL )
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{
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++line;
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/* remove comments, skip line if it's blank after comment
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removal. */
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if ( delete_comment ( buffer ) )
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continue;
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/** if this is a %ifdef, %ifndef, or %endif directive, then
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set the including variable accordingly. **/
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if ( buffer[0] == '%' )
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{
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flag = 0;
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if ( strncmp ( buffer+1, "ifdef", 5 ) == 0 )
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including = test_directive ( buffer+6 );
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else if ( strncmp ( buffer+1, "ifndef", 6 ) == 0 )
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including = !test_directive ( buffer+7 );
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else if ( strncmp ( buffer+1, "endif", 5 ) == 0 )
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including = 1;
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else
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flag = 1;
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if ( !flag )
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continue;
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}
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/* skip this line unless including is set. */
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if ( !including )
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continue;
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/** if this is a %define or %undefine directive, then process
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it. **/
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if ( buffer[0] == '%' )
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{
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if ( strncmp ( buffer+1, "define", 6 ) == 0 )
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define_directive ( buffer+7 );
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else if ( strncmp ( buffer+1, "undefine", 8 ) == 0 )
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undefine_directive ( buffer+9 );
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else
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error ( E_ERROR, "%s line %d: unknown directive.",
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filename, line );
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continue;
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}
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/* is this line continued? (is the last nonwhitespace character
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a backslash?) */
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cont = check_continuation ( buffer );
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/** make buf2 bigger if necessary. **/
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buflen = strlen ( buffer );
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while ( buf2len + buflen > buf2size + 10 )
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{
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buf2size += MAXPARAMLINELENGTH;
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buf2 = (char *)REALLOC ( buf2, buf2size * sizeof ( char ) );
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}
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/** tack the current line onto buf2. **/
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strcat ( buf2, buffer );
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buf2len += buflen;
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/** if this line is not continued further, then parse buf2. and
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add the parameter. **/
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if ( !cont )
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{
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if ( parse_one_parameter ( buf2 ) )
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{
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errors = 1;
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error ( E_ERROR, "%s line %d: syntax error.",
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filename, line );
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}
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/** reset buf2 as empty. **/
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buf2len = 0;
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buf2[0] = 0;
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}
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}
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/* close file. */
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fclose ( f );
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/** if the last line was continued, and nothing followed it, that's
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an error. **/
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if ( buf2len != 0 )
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{
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errors = 1;
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error ( E_ERROR, "unexpected EOF." );
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}
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/** if any errors occurred during parsing, stop now. **/
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if ( errors )
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error ( E_FATAL_ERROR,
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"some syntax errors occurred parsing \"%s\".", filename );
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FREE ( buf2 );
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}
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/* check_continuation()
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*
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* returns true/false depending on whether the given string is continued
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* (the last nonwhitespace character is a backslash). If so, the backslash
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* and everything after it is chopped.
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*/
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int check_continuation ( char *buffer )
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{
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int i, l;
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l = strlen ( buffer );
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for ( i = l-1; i >= 0; --i )
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if ( !isspace(buffer[i]) )
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{
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if ( buffer[i] == '\\' )
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{
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buffer[i] = '\n';
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buffer[i+1] = 0;
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return 1;
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}
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else
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return 0;
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}
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/* a blank line was passed. */
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return 0;
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}
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/* delete_comment()
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*
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* this searches the string for a '#' or ';' and chops everything
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* following, if one is found. returns 1 if the resulting line is blank
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* (all whitespace), 0 otherwise.
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*/
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int delete_comment ( char *buffer )
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{
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int i, l;
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l = strlen ( buffer );
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/* zero-length lines are considered blank. */
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if ( l == 0 )
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return 1;
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/* if the last character is a newline, chop it. */
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if ( buffer[--l] == '\n' )
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buffer[l] = 0;
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for ( i = 0; i < l; ++i )
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if ( buffer[i] == '#' || buffer[i] == ';' )
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{
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/* chop the line at a '#' or ';'. */
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buffer[i] = 0;
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break;
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}
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/* look for a nonwhitespace character. */
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l = strlen ( buffer );
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for ( i = 0; i < l; ++i )
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if ( !isspace(buffer[i]) )
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/* found one, return 0. */
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return 0;
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/* blank line, return 1. */
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return 1;
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}
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/* translate_binary()
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*
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* this translates all of the valid strings representing binary values
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* to the corresponding integer.
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*/
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int translate_binary ( char *string )
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{
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if ( strcmp ( string, "true" ) == 0 ||
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strcmp ( string, "t" ) == 0 ||
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strcmp ( string, "on" ) == 0 ||
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strcmp ( string, "yes" ) == 0 ||
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strcmp ( string, "y" ) == 0 ||
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strcmp ( string, "1" ) == 0 )
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return 1;
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else if ( strcmp ( string, "false" ) == 0 ||
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strcmp ( string, "f" ) == 0 ||
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strcmp ( string, "off" ) == 0 ||
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strcmp ( string, "no" ) == 0 ||
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strcmp ( string, "n" ) == 0 ||
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strcmp ( string, "0" ) == 0 )
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return 0;
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else
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return -1;
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}
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/* read_parameter_database()
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*
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* this reads parameters from a checkpoint file.
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*/
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void read_parameter_database ( FILE *f )
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{
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int i, j, k;
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int count;
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char *buf1, *buf2;
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int buf2len, buf2alloc;
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/* how many parameters are we supposed to find? */
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fscanf ( f, "%*s %d\n", &count );
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if ( fgetc ( f ) != '#' )
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error ( E_FATAL_ERROR, "error in parameter section of checkpoint file." );
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buf1 = (char *)MALLOC ( MAXPARAMLINELENGTH );
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buf2 = (char *)MALLOC ( MAXPARAMLINELENGTH );
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buf2alloc = MAXPARAMLINELENGTH;
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buf2[0] = 0;
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buf2len = 0;
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for ( i = 0; i < count; )
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{
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/* get a line in buf1. */
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fgets ( buf1, MAXPARAMLINELENGTH, f );
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/** lengthen buf2 if necessary. */
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while ( buf2len + strlen ( buf1 ) >= buf2alloc )
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{
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buf2 = (char *)REALLOC ( buf2, buf2alloc + MAXPARAMLINELENGTH );
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buf2alloc += MAXPARAMLINELENGTH;
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}
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/** tack line onto buf2. **/
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strcat ( buf2, buf1 );
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buf2len += strlen ( buf1 );
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/* get the first character of the next line. */
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k = fgetc ( f );
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if ( k != '+' )
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{
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/** not a '+', so the line is not continued. **/
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/* chop the final newline. */
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buf2[buf2len-1] = 0;
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for ( j = 0; j < buf2len; ++j )
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/* look for a " = " substring, and break it into name/value
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there. */
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if ( buf2[j] == ' ' && buf2[j+1] == '=' &&
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buf2[j+2] == ' ' )
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{
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/** add the parameter. **/
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buf2[j] = 0;
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add_parameter ( buf2, buf2+j+3,
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PARAM_COPY_NAME|PARAM_COPY_VALUE );
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#ifdef DEBUG
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fprintf ( stderr, "name = [%s]\nvalue = [%s]\n",
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buf2, buf2+j+3 );
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#endif
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}
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/** reset buf2. **/
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buf2[0] = 0;
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buf2len = 0;
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/* count of how many we've found. */
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++i;
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}
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}
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/* put the extra character we read back. */
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ungetc ( k, f );
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FREE ( buf1 );
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FREE ( buf2 );
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}
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/* write_parameter_database()
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*
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* this writes all the parameters to a checkpoint file, as "name = value\n".
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* since parameters can have embedded newlines, we begin each line of the
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* file with a "#" to indicate the start of a new name/value pair or a "+"
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* to indicate a continuation of the previous line.
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*/
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void write_parameter_database ( FILE *f )
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{
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int i, j;
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/* write the total count. */
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fprintf ( f, "parameter-count: %d\n", param_size );
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for ( i = 0; i < param_size; ++i )
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{
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/* start the pair with a '#'. */
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fputc ( '#', f );
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/** write the name, adding '+' after newlines. */
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for ( j = 0; j < strlen ( param[i].n ); ++j )
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{
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fputc ( param[i].n[j], f );
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if ( param[i].n[j] == '\n' )
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fputc ( '+', f );
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}
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/* write " = ". */
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fputs ( " = ", f );
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/** write the value, adding '+' after newlines. */
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for ( j = 0; j < strlen ( param[i].v ); ++j )
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{
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fputc ( param[i].v[j], f );
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if ( param[i].v[j] == '\n' )
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fputc ( '+', f );
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}
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/* end the pair. */
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fputc ( '\n', f );
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}
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}
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/* initialize_parameters()
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*
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* initializes the parameter database. */
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void initialize_parameters ( void )
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{
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oputs ( OUT_SYS, 30, " parameter database.\n" );
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param = (parameter *)MALLOC ( PARAMETER_MINSIZE * sizeof ( parameter ) );
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param_alloc = PARAMETER_MINSIZE;
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param_size = 0;
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}
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/* free_parameters()
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*
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* frees all the parameters.
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*/
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void free_parameters ( void )
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{
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int i;
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for ( i = 0; i < param_size; ++i )
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{
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/* if add_parameter made a copy of the name, then free it. */
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if ( param[i].copyflags & PARAM_COPY_NAME )
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FREE ( param[i].n );
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/* if add_parameter make a copy of the value, then free it. */
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if ( param[i].copyflags & PARAM_COPY_VALUE )
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FREE ( param[i].v );
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}
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FREE ( param );
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param = NULL;
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param_alloc = 0;
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param_size = 0;
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}
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/* add_parameter()
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*
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* adds the given name/value pair to the database. the flags indicate
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* which if any of the strings need to be copied.
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*/
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void add_parameter ( char *name, char *value, int copyflags )
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{
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/* erase any existing parameter of the same name. */
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delete_parameter ( name );
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/** if the database is full, make it bigger. **/
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while ( param_alloc < param_size+1 )
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{
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param_alloc += PARAMETER_CHUNKSIZE;
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param = (parameter *)REALLOC ( param,
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param_alloc * sizeof ( parameter ) );
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}
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/** add the name. **/
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if ( copyflags & PARAM_COPY_NAME )
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{
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/* make a copy of the string if requested. */
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param[param_size].n = (char *)MALLOC ( strlen(name)+1 );
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strcpy ( param[param_size].n, name );
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}
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else
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/* just store the pointer passed to us. */
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param[param_size].n = name;
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/** add the value. **/
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if ( copyflags & PARAM_COPY_VALUE )
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{
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/* make a copy of the string if requested. */
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param[param_size].v = (char *)MALLOC ( strlen(value)+1 );
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strcpy ( param[param_size].v, value );
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}
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else
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/* just store the pointer passed to us. */
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param[param_size].v = value;
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/* record whether our values are copies or not. */
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param[param_size].copyflags = copyflags;
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++param_size;
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}
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/* delete_parameter()
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*
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* deletes a parameter from the database.
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*/
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int delete_parameter ( char *name )
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{
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int i;
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for ( i = 0; i < param_size; ++i )
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if ( strcmp ( name, param[i].n ) == 0 )
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{
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/** free any copies make by add_parameter. **/
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if ( param[i].copyflags & PARAM_COPY_NAME )
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FREE ( param[i].n );
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if ( param[i].copyflags & PARAM_COPY_VALUE )
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FREE ( param[i].v );
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/** move the last value in the database to the position
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of the deleted one. **/
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if ( param_size-1 != i )
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{
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param[i].n = param[param_size-1].n;
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param[i].v = param[param_size-1].v;
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param[i].copyflags = param[param_size-1].copyflags;
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}
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--param_size;
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return 1;
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}
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return 0;
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}
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/* get_parameter()
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*
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* looks up a parameter in the database.
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*/
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char *get_parameter ( char *name )
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{
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int i;
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for ( i = 0; i < param_size; ++i )
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if ( strcmp ( name, param[i].n ) == 0 )
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return param[i].v;
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return NULL;
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}
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/* print_parameters()
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*
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* dumps parameter database to stdout.
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*/
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void print_parameters ( void )
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{
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int i;
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for ( i = 0; i < param_size; ++i )
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printf ( "name: \"%s\" value: \"%s\" copy: %d\n",
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param[i].n, param[i].v, param[i].copyflags );
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}
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/* parse_one_parameter()
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*
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* breaks a string at the first equals sign into name and value parts.
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* removes leading and trailing whitespace from both parts. inserts the
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* resulting pair into the parameter database.
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*/
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int parse_one_parameter ( char *buffer )
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{
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char name[MAXPARAMLINELENGTH+1];
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char data[MAXPARAMLINELENGTH+1];
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int i, j, k, l;
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int n, d;
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k = -1;
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j = 0;
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l = strlen ( buffer );
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/** scan for a equals sign. **/
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for ( i = 0; i < l; ++i )
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{
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/* j records whether or not we have found a nonwhitespace
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character. */
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j += (buffer[i] != ' ' && buffer[i] != '\t' && buffer[i] != '\n');
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if ( buffer[i] == '=' )
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{
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k = i;
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/* copy the name part. */
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strncpy ( name, buffer, k );
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name[k] = 0;
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/* copy the value part. */
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strcpy ( data, buffer+k+1 );
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break;
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}
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}
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/* if we found no '=', return an error unless the line was
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completely blank. */
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if ( k == -1 )
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return !!j;
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/* trim leading and trailing whitespace. */
|
|
n = trim_string ( name );
|
|
d = trim_string ( data );
|
|
|
|
/** if either section is blank, return an error, otherwise add
|
|
the pair as a parameter. **/
|
|
if ( n == 0 || d == 0 )
|
|
return 1;
|
|
else
|
|
add_parameter ( name, data, PARAM_COPY_NAME|PARAM_COPY_VALUE );
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* trim_string()
|
|
*
|
|
* trims leading and trailing whitespace from a string, overwriting the
|
|
* argument with the result. returns number of characters in result.
|
|
*/
|
|
|
|
int trim_string ( char *string )
|
|
{
|
|
int i, j, l;
|
|
|
|
j = -1;
|
|
l = strlen ( string );
|
|
for ( i = 0; i < l; ++i )
|
|
{
|
|
if ( j == -1 )
|
|
{
|
|
if ( string[i] != ' ' && string[i] != '\t' &&
|
|
string[i] != '\n' )
|
|
{
|
|
j = i;
|
|
--i;
|
|
}
|
|
}
|
|
else
|
|
string[i-j] = string[i];
|
|
}
|
|
if ( j == -1 )
|
|
{
|
|
string[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
string[i-j] = 0;
|
|
l = i-j;
|
|
j = -1;
|
|
for ( i = 0; i < l; ++i )
|
|
{
|
|
if ( string[i] != ' ' && string[i] != '\t' && string[i] != '\n' )
|
|
j = i;
|
|
}
|
|
string[j+1] = 0;
|
|
|
|
return j+1;
|
|
}
|
|
|
|
/* define_directive()
|
|
*
|
|
* defines a directive "SYMBOL", which is just a parameter called
|
|
* "__define:SYMBOL". trims leading and trailing whitespace from SYMBOL.
|
|
*/
|
|
|
|
void define_directive ( char *string )
|
|
{
|
|
char *buffer;
|
|
int i;
|
|
|
|
for ( i = 0; i < strlen(string) && isspace(string[i]); ++i );
|
|
|
|
buffer = (char *)MALLOC ( (20 + strlen(string)) * sizeof ( char ) );
|
|
strcpy ( buffer, "__define:" );
|
|
strcat ( buffer, string+i );
|
|
|
|
for ( i = strlen(buffer)-1; i >= 0 && isspace(buffer[i]); --i )
|
|
buffer[i] = 0;
|
|
|
|
add_parameter ( buffer, "1", PARAM_COPY_NAME );
|
|
FREE ( buffer );
|
|
}
|
|
|
|
/* undefine_directive()
|
|
*
|
|
* undefines a directive "SYMBOL".
|
|
*/
|
|
|
|
void undefine_directive ( char *string )
|
|
{
|
|
char *buffer;
|
|
int i;
|
|
|
|
for ( i = 0; i < strlen(string) && isspace(string[i]); ++i );
|
|
|
|
buffer = (char *)MALLOC ( (20 + strlen(string)) * sizeof ( char ) );
|
|
strcpy ( buffer, "__define:" );
|
|
strcat ( buffer, string+i );
|
|
|
|
for ( i = strlen(buffer)-1; i >= 0 && isspace(buffer[i]); --i )
|
|
buffer[i] = 0;
|
|
|
|
delete_parameter ( buffer );
|
|
FREE ( buffer );
|
|
}
|
|
|
|
/* test_directive()
|
|
*
|
|
* returns 1 iff a given directive is defined.
|
|
*/
|
|
|
|
int test_directive ( char *string )
|
|
{
|
|
char *buffer;
|
|
int ret;
|
|
int i;
|
|
|
|
for ( i = 0; i < strlen(string) && isspace(string[i]); ++i );
|
|
|
|
buffer = (char *)MALLOC ( (20 + strlen(string)) * sizeof ( char ) );
|
|
strcpy ( buffer, "__define:" );
|
|
strcat ( buffer, string+i );
|
|
|
|
for ( i = strlen(buffer)-1; i >= 0 && isspace(buffer[i]); --i )
|
|
buffer[i] = 0;
|
|
|
|
if ( get_parameter ( buffer ) )
|
|
ret = 1;
|
|
else
|
|
ret = 0;
|
|
|
|
FREE ( buffer );
|
|
return ret;
|
|
}
|
|
|
|
/* binary_parameter()
|
|
*
|
|
* checks for the existence of a parameter. if it exists, then it is changed
|
|
* to the string "0" or "1" using lilgp's list of strings representing
|
|
* binary values. if the value is not on the list, or the parameter is
|
|
* not found, then the parameter is set according to the value argument (it
|
|
* acts as a default).
|
|
*/
|
|
|
|
void binary_parameter ( char *name, int value )
|
|
{
|
|
char *param = get_parameter ( name );
|
|
char string[2];
|
|
char *i, *is;
|
|
int v;
|
|
|
|
if ( param != NULL )
|
|
{
|
|
/* copy the value and lowercase it. */
|
|
v = strlen ( param );
|
|
i = (char *)MALLOC ( (v+1)*sizeof ( char ) );
|
|
strcpy ( i, param );
|
|
for ( is = i; *is; ++is )
|
|
*is = tolower(*is);
|
|
|
|
/* translate to a binary integer. */
|
|
v = translate_binary ( i );
|
|
|
|
if ( v == -1 )
|
|
{
|
|
/* translation failed, use the value argument. */
|
|
error ( E_ERROR,
|
|
"\"%s\" is not a legal value for \"%s\"; assuming default.",
|
|
i, name );
|
|
v = value;
|
|
}
|
|
|
|
FREE ( i );
|
|
|
|
}
|
|
else
|
|
/* parameter not found, use the value argument. */
|
|
v = value;
|
|
|
|
/** print the value to a string and put it in the parameter database. */
|
|
sprintf ( string, "%d", !!v );
|
|
add_parameter ( name, string, PARAM_COPY_VALUE|PARAM_COPY_NAME );
|
|
|
|
}
|
|
|
|
|
|
|
|
|