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/* command.c: Parse a debugger command
Copyright (c) 2002-2015 Philip Kendall
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Author contact information:
E-mail: philip-fuse@shadowmagic.org.uk
*/
#include <config.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include "debugger.h"
#include "debugger_internals.h"
#include "mempool.h"
#include "ui/ui.h"
#include "utils.h"
#include "z80/z80.h"
#include "z80/z80_macros.h"
/* The last debugger command we were given to execute */
static char *command_buffer = NULL;
/* And a pointer as to how much we've parsed */
static char *command_ptr;
int yyparse( void );
int yywrap( void );
/* Evaluate the debugger command given in 'command' */
void
debugger_command_evaluate( const char *command )
{
if( !command ) return;
if( command_buffer ) libspectrum_free( command_buffer );
command_buffer = utils_safe_strdup( command );
/* Start parsing at the start of the given command */
command_ptr = command_buffer;
/* Parse the command */
yyparse();
/* And free any memory we allocated while parsing */
mempool_free( debugger_memory_pool );
ui_debugger_update();
}
/* Utility functions called from the flex scanner */
int
yywrap( void )
{
return 1;
}
/* Called to get up to 'max_size' bytes of the command to be parsed */
int
debugger_command_input( char *buf, int *result, int max_size )
{
size_t length = strlen( command_ptr );
if( !length ) {
return 0;
} else if( length < (size_t)max_size ) {
memcpy( buf, command_ptr, length );
*result = length; command_ptr += length;
return 1;
} else {
memcpy( buf, command_ptr, max_size );
*result = max_size; command_ptr += max_size;
return 1;
}
}
/* Utility functions called by the bison parser */
/* The error callback if yyparse finds an error */
void
yyerror( const char *s )
{
ui_error( UI_ERROR_ERROR, "Invalid debugger command: %s", s );
}
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