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/*=============================================================================*\
* File: gfsmScanner.c
* Author: Bryan Jurish <moocow@ling.uni-potsdam.de>
* Description: finite state machine library
*
* Copyright (c) 2005 Bryan Jurish.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*=============================================================================*/
#include <gfsmScanner.h>
#include <gfsmUtils.h>
#include <string.h>
/*======================================================================
* Constants
*/
const char *gfsmScannerDefaultName = "gfsmScanner";
const char *gfsmScannerDefaultFilename = "input";
/*======================================================================
* gfsmScanner: Constructors etc.
*/
//--------------------------------------------------------------
gfsmScanner *gfsm_scanner_new_full(const char *name,
gfsmFlexScannerInitFunc yyinit_func,
gfsmFlexScannerFreeFunc yyfree_func,
gfsmFlexScannerScanFileFunc yyscan_file_func,
gfsmFlexScannerScanBytesFunc yyscan_bytes_func,
gfsmFlexScannerScanPopFunc yyscan_pop_func,
gfsmFlexScannerGetTextFunc yyget_text_func,
gfsmFlexScannerGetPosFunc yyget_lineno_func,
gfsmFlexScannerSetPosFunc yyset_lineno_func,
gfsmFlexScannerSetExtraFunc yyset_extra_func)
{
return gfsm_scanner_init_full(g_new0(gfsmScanner,1),
name,
yyinit_func,
yyfree_func,
yyscan_file_func,
yyscan_bytes_func,
yyscan_pop_func,
yyget_text_func,
yyget_lineno_func,
yyset_lineno_func,
yyset_extra_func);
}
//--------------------------------------------------------------
gfsmScanner *gfsm_scanner_init_full(gfsmScanner *scanner,
const char *name,
gfsmFlexScannerInitFunc yyinit_func,
gfsmFlexScannerFreeFunc yyfree_func,
gfsmFlexScannerScanFileFunc yyscan_file_func,
gfsmFlexScannerScanBytesFunc yyscan_bytes_func,
gfsmFlexScannerScanPopFunc yyscan_pop_func,
gfsmFlexScannerGetTextFunc yyget_text_func,
gfsmFlexScannerGetPosFunc yyget_lineno_func,
gfsmFlexScannerSetPosFunc yyset_lineno_func,
gfsmFlexScannerSetExtraFunc yyset_extra_func)
{
scanner->data = NULL;
scanner->name = (char *)name;
scanner->filename = NULL;
scanner->err = NULL;
//-- funcs: init, free
scanner->yyfree_func = yyfree_func;
//-- data & funcs: buffer switching
scanner->infile = NULL;
scanner->yyscan_file_func = yyscan_file_func;
scanner->yyscan_bytes_func = yyscan_bytes_func;
scanner->yyscan_pop_func = yyscan_pop_func;
//-- funcs: text
scanner->yyget_text_func = yyget_text_func;
//-- funcs: position
scanner->yyget_lineno_func = yyget_lineno_func;
scanner->yyset_lineno_func = yyset_lineno_func;
//-- initialize underlying scanner
if (yyinit_func) (*yyinit_func)(&(scanner->yyscanner));
//-- set extra data
if (yyset_extra_func) (*yyset_extra_func)(scanner, scanner->yyscanner);
return scanner;
}
//--------------------------------------------------------------
void gfsm_scanner_free(gfsmScanner *scanner)
{
gfsm_scanner_close(scanner);
if (scanner->yyfree_func) (*(scanner->yyfree_func))(scanner->yyscanner);
g_clear_error(&(scanner->err));
g_free(scanner);
}
/*======================================================================
* gfsmScanner: I/O Selection
*/
//--------------------------------------------------------------
void gfsm_scanner_close(gfsmScanner *scanner)
{
(*(scanner->yyscan_pop_func))(scanner->yyscanner);
if (scanner->infile) {
fclose(scanner->infile);
scanner->infile = NULL;
}
if (scanner->filename) {
g_free(scanner->filename);
scanner->filename = NULL;
}
}
//--------------------------------------------------------------
void gfsm_scanner_scan_file(gfsmScanner *scanner, FILE *f)
{
gfsm_scanner_close(scanner);
(*(scanner->yyscan_file_func))(f, scanner->yyscanner);
(*(scanner->yyset_lineno_func))(1, scanner->yyscanner);
}
//--------------------------------------------------------------
void gfsm_scanner_scan_filename(gfsmScanner *scanner, const char *filename)
{
g_clear_error(&(scanner->err));
FILE *f = gfsm_open_filename(filename, "r", &(scanner->err));
gfsm_scanner_scan_file(scanner,f);
scanner->filename = g_strdup(filename);
scanner->infile = f;
}
//--------------------------------------------------------------
void gfsm_scanner_scan_bytes(gfsmScanner *scanner, const char *bytes, int len)
{
gfsm_scanner_close(scanner);
(*(scanner->yyscan_bytes_func))(bytes, len, scanner->yyscanner);
(*(scanner->yyset_lineno_func))(1, scanner->yyscanner);
}
//--------------------------------------------------------------
void gfsm_scanner_scan_gstring(gfsmScanner *scanner, GString *gstr)
{
gfsm_scanner_scan_bytes(scanner, gstr->str, gstr->len);
}
//--------------------------------------------------------------
void gfsm_scanner_scan_string(gfsmScanner *scanner, const char *str)
{
gfsm_scanner_scan_bytes(scanner, str, strlen(str));
}
/*======================================================================
* gfsmScanner: Flex utilities
*/
//--------------------------------------------------------------
int gfsm_scanner_yywrap(gfsmScanner *scanner)
{ return 1; }
/*======================================================================
* gfsmScanner: error reporting
*/
//--------------------------------------------------------------
void gfsm_scanner_carp(gfsmScanner *scanner, const char *fmt, ...)
{
va_list ap;
va_start(ap,fmt);
gfsm_scanner_carp_full_v(scanner,
g_quark_from_static_string("gfsm"),
g_quark_from_static_string("scanner_error"),
fmt, ap);
va_end(ap);
}
//--------------------------------------------------------------
void gfsm_scanner_carp_full(gfsmScanner *scanner,
GQuark domain,
gint code,
const char *fmt,
...)
{
va_list ap;
va_start(ap,fmt);
gfsm_scanner_carp_full_v(scanner,domain,code,fmt,ap);
va_end(ap);
}
//--------------------------------------------------------------
void gfsm_scanner_carp_full_v(gfsmScanner *scanner,
GQuark domain,
gint code,
const char *fmt,
va_list ap)
{
char *msg = g_strdup_vprintf(fmt, ap);
if (scanner->err) {
g_error_free(scanner->err);
scanner->err = NULL;
}
g_set_error(&(scanner->err), domain, code,
"%s: %s in %s%s%s at line %u%s%s%s",
(scanner->name ? scanner->name : gfsmScannerDefaultName),
msg,
(scanner->filename ? "file \"" : ""),
(scanner->filename ? scanner->filename : gfsmScannerDefaultFilename),
(scanner->filename ? "\"" : ""),
(scanner->yyget_lineno_func ? (*(scanner->yyget_lineno_func))(scanner->yyscanner) : 0),
//--
(scanner->yyget_text_func ? ", near \"" : ""),
(scanner->yyget_text_func ? (*(scanner->yyget_text_func))(scanner->yyscanner) : ""),
(scanner->yyget_text_func ? "\"" : "")
);
if (scanner->emit_warnings) {
fprintf(stderr, "%s\n", scanner->err->message);
}
g_free(msg);
}
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