diff options
Diffstat (limited to 'gfsm/gfsm/src/libgfsm/gfsmScanner.c')
| -rw-r--r-- | gfsm/gfsm/src/libgfsm/gfsmScanner.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/gfsm/gfsm/src/libgfsm/gfsmScanner.c b/gfsm/gfsm/src/libgfsm/gfsmScanner.c new file mode 100644 index 0000000..afa2632 --- /dev/null +++ b/gfsm/gfsm/src/libgfsm/gfsmScanner.c @@ -0,0 +1,246 @@ + +/*=============================================================================*\ + * 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); +} |