WebSVN – tendra.SVN – Diff – /branches/tendra5/src/utilities/lexi/lex.c

+/*
+ * Copyright (c) 2002-2005 The TenDRA Project <http://www.tendra.org/>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of The TenDRA Project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific, prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
+ * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ */
 /*
     		 Crown Copyright (c) 1997
     This TenDRA(r) Computer Program is subject to Copyright
     owned by the United Kingdom Secretary of State for Defence
     acting through the Defence Evaluation and Research Agency
     (DERA).  It is made available to Recipients with a
     royalty-free licence for its use, reproduction, transfer
     to other parties and amendment for any purpose not excluding
     product development provided that any such use et cetera
     shall be deemed to be acceptance of the following conditions:-
         (1) Its Recipients shall ensure that this Notice is
         reproduced upon any copies or amended versions of it;
         (2) Any amended version of it shall be clearly marked to
         show both the nature of and the organisation responsible
         for the relevant amendment or amendments;
         (3) Its onward transfer from a recipient to another
         party shall be deemed to be that party's acceptance of
         these conditions;
         (4) DERA gives no warranty or assurance as to its
         quality or suitability for any purpose and DERA accepts
         no liability whatsoever in relation to any use to which
         it may be put.
 */
     INPUT FILE
     This is the file from which the lexical routine read their input.
 */
-static FILE *lex_input ;
+static FILE *lex_input;
 /*
     PENDING BUFFER
     characters pending, otherwise the pending characters are stored in
     the buffer.  The buffer may need increasing in size if the look-ahead
     required by the lexical analyser increases.
 */
-static int pending_buff [12] = { '?' } ;
+static int pending_buff [12] = { '?' };
-static int *pending = pending_buff ;
+static int *pending = pending_buff;
 /*
     MAPPINGS AND DECLARATIONS FOR AUTOMATICALLY GENERATED SECTION
     These macros give the mappings between the actions used in the
     automatically generated lexical analyser and the routines defined
     in this file.
 */
-static int read_char PROTO_S ( ( void ) ) ;
+static int read_char(void);
-static int read_comment PROTO_S ( ( void ) ) ;
+static int read_comment(void);
-static int read_identifier PROTO_S ( ( int, int ) ) ;
+static int read_identifier(int, int);
-static int read_string PROTO_S ( ( void ) ) ;
+static int read_string(void);
-#define get_comment( A, B )	read_comment ()
+#define get_comment(A, B)	read_comment()
-#define get_identifier( A )	read_identifier ( ( A ), 0 )
+#define get_identifier(A)	read_identifier((A), 0)
-#define get_sid_ident( A, B )	read_identifier ( ( B ), 1 )
+#define get_sid_ident(A, B)	read_identifier((B), 1)
-#define get_string( A )		read_string ()
+#define get_string(A)		read_string()
-#define unknown_token( A )	lex_unknown
+#define unknown_token(A)	lex_unknown
-#define unread_char( A )	*( ++pending ) = ( A )
+#define unread_char(A)	*(++pending) = (A)
 /*
     AUTOMATICALLY GENERATED SECTION
     This routine reads the next character, either from the pending buffer
     or from the input file.
 */
-static int read_char
+static int
-    PROTO_Z ()
+read_char(void)
+{
-    int c ;
+    int c;
-    if ( pending != pending_buff ) {
+    if (pending != pending_buff) {
-	c = *( pending-- ) ;
+	c = *(pending--);
     } else {
-	c = fgetc ( lex_input ) ;
+	c = fgetc(lex_input);
-	if ( c == '\n' ) crt_line_no++ ;
+	if (c == '\n')crt_line_no++;
-	if ( c == EOF ) return ( LEX_EOF ) ;
+	if (c == EOF) return(LEX_EOF);
-	c &= 0xff ;
+	c &= 0xff;
+    }
-    return ( c ) ;
+    return(c);
+}
 /*
     TOKEN BUFFER
     This buffer is used by read_token to hold the values of identifiers
     and strings.
 */
-char token_buff [2000] ;
+char token_buff [2000];
-static char *token_end = token_buff + sizeof ( token_buff ) ;
+static char *token_end = token_buff + sizeof(token_buff);
-char *first_comment = NULL ;
+char *first_comment = NULL;
 /*
     READ AN IDENTIFIER
     This routine reads an identifier beginning with a, returning the
     corresponding lexical token.  Keywords are dealt with locally.
     The sid flag indicates whether a sid-style identifier is expected.
 */
-static int read_identifier
+static int
-    PROTO_N ( ( a, sid ) )
-    PROTO_T ( int a X int sid )
+read_identifier(int a, int sid)
+{
-    int c = a, cl ;
+    int c = a, cl;
-    int e = ( sid ? '-' : 'x' ) ;
+    int e = (sid ? '-' : 'x');
-    char *t = token_buff ;
+    char *t = token_buff;
     do {
-	*( t++ ) = ( char ) c ;
+	*(t++) = (char)c;
-	if ( t == token_end ) error ( ERROR_FATAL, "Buffer overflow" ) ;
+	if (t == token_end)error(ERROR_FATAL, "Buffer overflow");
-	c = read_char () ;
+	c = read_char();
-	cl = lookup_char ( c ) ;
+	cl = lookup_char(c);
-    } while ( is_alphanum ( cl ) || c == e ) ;
+    } while (is_alphanum(cl) || c == e);
-    *t = 0 ;
+    *t = 0;
-    unread_char ( c ) ;
+    unread_char(c);
     /* Deal with keywords */
-    if ( sid ) return ( lex_sid_Hidentifier ) ;
+    if (sid) return(lex_sid_Hidentifier);
-    t = token_buff ;
+    t = token_buff;
-#define MAKE_KEYWORD( A, B )\
+#define MAKE_KEYWORD(A, B)\
-    if ( streq ( t, ( A ) ) ) return ( B ) ;
+    if (streq(t,(A))) return(B);
 #include "keyword.h"
-    return ( lex_identifier ) ;
+    return(lex_identifier);
+}
 /*
     READ A STRING
     This routine reads a string.  It is entered after the initial
     quote has been read.
 */
-static int read_string
+static int
-    PROTO_Z ()
+read_string(void)
+{
-    int c ;
+    int c;
-    int escaped = 0 ;
+    int escaped = 0;
-    char *t = token_buff ;
+    char *t = token_buff;
-    while ( c = read_char (), ( c != '"' || escaped ) ) {
+    while (c = read_char(), (c != '"' || escaped)) {
-	if ( c == '\n' || c == LEX_EOF ) {
+	if (c == '\n' || c == LEX_EOF) {
-	    error ( ERROR_SERIOUS, "Unexpected end of string" ) ;
+	    error(ERROR_SERIOUS, "Unexpected end of string");
-	    break ;
+	    break;
+	}
-	*( t++ ) = ( char ) c ;
+	*(t++) = (char)c;
-	if ( t == token_end ) error ( ERROR_FATAL, "Buffer overflow" ) ;
+	if (t == token_end)error(ERROR_FATAL, "Buffer overflow");
-	if ( escaped ) {
+	if (escaped) {
-	    escaped = 0 ;
+	    escaped = 0;
 	} else {
-	    if ( c == '\\' ) escaped = 1 ;
+	    if (c == '\\')escaped = 1;
+	}
+    }
-    *t = 0 ;
+    *t = 0;
-    return ( lex_string ) ;
+    return(lex_string);
+}
 /*
     READ A COMMENT
     This routine reads a C style comment, returning the lexical token
     immediately following.  It is entered after the first two characters
     have been read.
 */
-static int read_comment
+static int
-    PROTO_Z ()
+read_comment(void)
+{
-    int state = 0 ;
+    int state = 0;
-    char *t = token_buff ;
+    char *t = token_buff;
-    *( t++ ) = '/' ;
+    *(t++) = '/';
-    *( t++ ) = '*' ;
+    *(t++) = '*';
-    while ( state != 2 ) {
+    while (state != 2) {
-	int c = read_char () ;
+	int c = read_char();
-	if ( c == LEX_EOF ) {
+	if (c == LEX_EOF) {
-	    error ( ERROR_SERIOUS, "End of file in comment" ) ;
+	    error(ERROR_SERIOUS, "End of file in comment");
-	    return ( lex_eof ) ;
+	    return(lex_eof);
+	}
-	if ( c == '*' ) {
+	if (c == '*') {
-	    state = 1 ;
+	    state = 1;
-	} else if ( state == 1 && c == '/' ) {
+	} else if (state == 1 && c == '/') {
-	    state = 2 ;
+	    state = 2;
 	} else {
-	    state = 0 ;
+	    state = 0;
+	}
-	*( t++ ) = ( char ) c ;
+	*(t++) = (char)c;
-	if ( t == token_end ) t = token_buff + 2 ;
+	if (t == token_end)t = token_buff + 2;
+    }
-    *t = 0 ;
+    *t = 0;
-    if ( first_comment == NULL ) first_comment = xstrcpy ( token_buff ) ;
+    if (first_comment == NULL)first_comment = xstrcpy(token_buff);
-    return ( read_token () ) ;
+    return(read_token());
+}
 /*
     CURRENT TOKEN
     These variables are used by the parser to hold the current and former
     lexical tokens.
 */
-int crt_lex_token ;
+int crt_lex_token;
-int saved_lex_token ;
+int saved_lex_token;
 /*
     PROCESS FILE
     This routine processes the input file nm.
 */
-void process_file
+void
-    PROTO_N ( ( nm ) )
-    PROTO_T ( char *nm )
+process_file(char *nm)
+{
-    crt_line_no = 1 ;
+    crt_line_no = 1;
-    if ( nm == NULL || streq ( nm, "-" ) ) {
+    if (nm == NULL || streq(nm, "-")) {
-	crt_file_name = "<stdin>" ;
+	crt_file_name = "<stdin>";
-	lex_input = stdin ;
+	lex_input = stdin;
-	nm = NULL ;
+	nm = NULL;
     } else {
-	crt_file_name = nm ;
+	crt_file_name = nm;
-	lex_input = fopen ( nm, "r" ) ;
+	lex_input = fopen(nm, "r");
-	if ( lex_input == NULL ) {
+	if (lex_input == NULL) {
-	    error ( ERROR_SERIOUS, "Can't open input file, '%s'", nm ) ;
+	    error(ERROR_SERIOUS, "Can't open input file, '%s'", nm);
-	    return ;
+	    return;
+	}
+    }
-    ADVANCE_LEXER ;
+    ADVANCE_LEXER;
-    read_lex () ;
+    read_lex();
-    if ( nm ) fclose_v ( lex_input ) ;
+    if (nm)fclose_v(lex_input);
-    return ;
+    return;
+}

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(root)/branches/tendra5/src/utilities/lexi/lex.c – Rev 5 → 6