/* do not edit automatically generated by mc from bnflex. */
/* bnflex.mod provides a simple lexical package for pg.
Copyright (C) 2001-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 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 3, or (at your option)
any later version.
GNU Modula-2 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 GNU Modula-2; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
# if !defined (PROC_D)
# define PROC_D
typedef void (*PROC_t) (void);
typedef struct { PROC_t proc; } PROC;
# endif
# if !defined (TRUE)
# define TRUE (1==1)
# endif
# if !defined (FALSE)
# define FALSE (1==0)
# endif
#include <string.h>
#include <limits.h>
#define _bnflex_H
#define _bnflex_C
# include "GPushBackInput.h"
# include "GSymbolKey.h"
# include "GASCII.h"
# include "GDebug.h"
# include "GNameKey.h"
# include "GStrLib.h"
# include "GFIO.h"
# include "GStrCase.h"
# include "GStdIO.h"
# define MaxNameLength 8192
typedef enum {bnflex_identtok, bnflex_literaltok, bnflex_codetok, bnflex_lbecomestok, bnflex_rbecomestok, bnflex_bartok, bnflex_lsparatok, bnflex_rsparatok, bnflex_lcparatok, bnflex_rcparatok, bnflex_lparatok, bnflex_rparatok, bnflex_errortok, bnflex_tfunctok, bnflex_symfunctok, bnflex_squotetok, bnflex_dquotetok, bnflex_moduletok, bnflex_begintok, bnflex_rulestok, bnflex_endtok, bnflex_lesstok, bnflex_gretok, bnflex_tokentok, bnflex_specialtok, bnflex_firsttok, bnflex_followtok, bnflex_BNFtok, bnflex_FNBtok, bnflex_declarationtok, bnflex_epsilontok, bnflex_eoftok} bnflex_TokenType;
static FIO_File f;
static SymbolKey_SymbolTree ReservedWords;
static NameKey_Name CurrentToken;
static bnflex_TokenType CurrentType;
static unsigned int Debugging;
static unsigned int InQuote;
static char QuoteChar;
/*
OpenSource - Attempts to open the source file, a.
The success of the operation is returned.
*/
extern "C" unsigned int bnflex_OpenSource (const char *a_, unsigned int _a_high);
/*
CloseSource - Closes the current open file.
*/
extern "C" void bnflex_CloseSource (void);
/*
GetChar - returns the current character on the input stream.
*/
extern "C" char bnflex_GetChar (void);
/*
PutChar - pushes a character onto the push back stack, it also
returns the character which has been pushed.
*/
extern "C" char bnflex_PutChar (char ch);
/*
SymIs - if t is equal to the current token the next token is read
and true is returned, otherwise false is returned.
*/
extern "C" unsigned int bnflex_SymIs (bnflex_TokenType t);
/*
IsSym - returns the result of the comparison between the current token
type and t.
*/
extern "C" unsigned int bnflex_IsSym (bnflex_TokenType t);
/*
GetCurrentTokenType - returns the type of current token.
*/
extern "C" bnflex_TokenType bnflex_GetCurrentTokenType (void);
/*
GetCurrentToken - returns the NameKey of the current token.
*/
extern "C" NameKey_Name bnflex_GetCurrentToken (void);
/*
SkipUntilWhite - skips all characters until white space is seen.
*/
extern "C" void bnflex_SkipUntilWhite (void);
/*
SkipWhite - skips all white space.
*/
extern "C" void bnflex_SkipWhite (void);
/*
SkipUntilEoln - skips until a lf is seen. It consumes the lf.
*/
extern "C" void bnflex_SkipUntilEoln (void);
/*
AdvanceToken - advances to the next token.
*/
extern "C" void bnflex_AdvanceToken (void);
/*
IsReserved - returns TRUE if the name is a reserved word.
*/
extern "C" unsigned int bnflex_IsReserved (NameKey_Name name);
/*
PushBackToken - pushes a token back onto input.
*/
extern "C" void bnflex_PushBackToken (NameKey_Name t);
/*
SetDebugging - sets the debugging flag.
*/
extern "C" void bnflex_SetDebugging (unsigned int flag);
/*
EatChar - consumes the next character in the input.
*/
static void EatChar (void);
/*
IsWhite - returns TRUE if, ch, is a space or a tab.
*/
static unsigned int IsWhite (char ch);
/*
SkipComments - consumes comments.
*/
static void SkipComments (void);
/*
WriteToken -
*/
static void WriteToken (void);
/*
Init - initialize the modules global variables.
*/
static void Init (void);
/*
EatChar - consumes the next character in the input.
*/
static void EatChar (void)
{
if ((PushBackInput_GetCh (f)) == ASCII_nul)
{} /* empty. */
}
/*
IsWhite - returns TRUE if, ch, is a space or a tab.
*/
static unsigned int IsWhite (char ch)
{
return ((ch == ' ') || (ch == ASCII_tab)) || (ch == ASCII_lf);
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
SkipComments - consumes comments.
*/
static void SkipComments (void)
{
bnflex_SkipWhite ();
while ((bnflex_PutChar (bnflex_GetChar ())) == '-')
{
if (((bnflex_GetChar ()) == '-') && ((bnflex_PutChar (bnflex_GetChar ())) == '-'))
{
/* found comment, skip it */
bnflex_SkipUntilEoln ();
bnflex_SkipWhite ();
}
else
{
/* no second '-' found thus restore first '-' */
if ((bnflex_PutChar ('-')) == '-')
{} /* empty. */
return ;
}
}
}
/*
WriteToken -
*/
static void WriteToken (void)
{
NameKey_WriteKey (CurrentToken);
StdIO_Write (' ');
}
/*
Init - initialize the modules global variables.
*/
static void Init (void)
{
typedef struct Init__T1_a Init__T1;
struct Init__T1_a { char array[1+1]; };
Init__T1 a;
SymbolKey_InitTree (&ReservedWords);
Debugging = FALSE;
a.array[0] = ASCII_nul;
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) &a.array[0], 1), ((unsigned int) (bnflex_eoftok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "%", 1), ((unsigned int) (bnflex_codetok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) ":=", 2), ((unsigned int) (bnflex_lbecomestok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "=:", 2), ((unsigned int) (bnflex_rbecomestok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "|", 1), ((unsigned int) (bnflex_bartok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "[", 1), ((unsigned int) (bnflex_lsparatok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "]", 1), ((unsigned int) (bnflex_rsparatok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "{", 1), ((unsigned int) (bnflex_lcparatok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "}", 1), ((unsigned int) (bnflex_rcparatok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "(", 1), ((unsigned int) (bnflex_lparatok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) ")", 1), ((unsigned int) (bnflex_rparatok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "<", 1), ((unsigned int) (bnflex_lesstok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) ">", 1), ((unsigned int) (bnflex_gretok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "error", 5), ((unsigned int) (bnflex_errortok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "tokenfunc", 9), ((unsigned int) (bnflex_tfunctok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "symfunc", 7), ((unsigned int) (bnflex_symfunctok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "'", 1), ((unsigned int) (bnflex_squotetok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "\"", 1), ((unsigned int) (bnflex_dquotetok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "module", 6), ((unsigned int) (bnflex_moduletok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "begin", 5), ((unsigned int) (bnflex_begintok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "rules", 5), ((unsigned int) (bnflex_rulestok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "end", 3), ((unsigned int) (bnflex_endtok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "declaration", 11), ((unsigned int) (bnflex_declarationtok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "token", 5), ((unsigned int) (bnflex_tokentok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "special", 7), ((unsigned int) (bnflex_specialtok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "first", 5), ((unsigned int) (bnflex_firsttok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "follow", 6), ((unsigned int) (bnflex_followtok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "epsilon", 7), ((unsigned int) (bnflex_epsilontok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "BNF", 3), ((unsigned int) (bnflex_BNFtok)));
SymbolKey_PutSymKey (ReservedWords, NameKey_MakeKey ((const char *) "FNB", 3), ((unsigned int) (bnflex_FNBtok)));
CurrentToken = NameKey_NulName;
CurrentType = bnflex_identtok;
InQuote = FALSE;
}
/*
OpenSource - Attempts to open the source file, a.
The success of the operation is returned.
*/
extern "C" unsigned int bnflex_OpenSource (const char *a_, unsigned int _a_high)
{
char a[_a_high+1];
/* make a local copy of each unbounded array. */
memcpy (a, a_, _a_high+1);
f = PushBackInput_Open ((const char *) a, _a_high);
return FIO_IsNoError (f);
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
CloseSource - Closes the current open file.
*/
extern "C" void bnflex_CloseSource (void)
{
PushBackInput_Close (f);
}
/*
GetChar - returns the current character on the input stream.
*/
extern "C" char bnflex_GetChar (void)
{
return PushBackInput_GetCh (f);
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
PutChar - pushes a character onto the push back stack, it also
returns the character which has been pushed.
*/
extern "C" char bnflex_PutChar (char ch)
{
return PushBackInput_PutCh (ch);
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
SymIs - if t is equal to the current token the next token is read
and true is returned, otherwise false is returned.
*/
extern "C" unsigned int bnflex_SymIs (bnflex_TokenType t)
{
if (CurrentType == t)
{
bnflex_AdvanceToken ();
return TRUE;
}
else
{
return FALSE;
}
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
IsSym - returns the result of the comparison between the current token
type and t.
*/
extern "C" unsigned int bnflex_IsSym (bnflex_TokenType t)
{
return t == CurrentType;
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
GetCurrentTokenType - returns the type of current token.
*/
extern "C" bnflex_TokenType bnflex_GetCurrentTokenType (void)
{
return CurrentType;
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
GetCurrentToken - returns the NameKey of the current token.
*/
extern "C" NameKey_Name bnflex_GetCurrentToken (void)
{
return CurrentToken;
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
SkipUntilWhite - skips all characters until white space is seen.
*/
extern "C" void bnflex_SkipUntilWhite (void)
{
while (((! (IsWhite (bnflex_PutChar (bnflex_GetChar ())))) && ((bnflex_PutChar (bnflex_GetChar ())) != ASCII_nul)) || ((bnflex_PutChar (bnflex_GetChar ())) == ASCII_lf))
{
EatChar ();
}
}
/*
SkipWhite - skips all white space.
*/
extern "C" void bnflex_SkipWhite (void)
{
while (IsWhite (bnflex_PutChar (bnflex_GetChar ())))
{
EatChar ();
}
}
/*
SkipUntilEoln - skips until a lf is seen. It consumes the lf.
*/
extern "C" void bnflex_SkipUntilEoln (void)
{
while (((bnflex_PutChar (bnflex_GetChar ())) != ASCII_lf) && ((bnflex_PutChar (bnflex_GetChar ())) != ASCII_nul))
{
EatChar ();
}
if ((bnflex_PutChar (bnflex_GetChar ())) == ASCII_lf)
{
EatChar ();
}
}
/*
AdvanceToken - advances to the next token.
*/
extern "C" void bnflex_AdvanceToken (void)
{
typedef struct AdvanceToken__T2_a AdvanceToken__T2;
struct AdvanceToken__T2_a { char array[MaxNameLength+1]; };
AdvanceToken__T2 a;
unsigned int i;
i = 0;
if (InQuote)
{
if (CurrentType == bnflex_literaltok)
{
if ((bnflex_PutChar (bnflex_GetChar ())) == QuoteChar)
{
a.array[i] = bnflex_GetChar ();
InQuote = FALSE;
i += 1;
a.array[i] = ASCII_nul;
CurrentToken = NameKey_MakeKey ((const char *) &a.array[0], MaxNameLength);
CurrentType = (bnflex_TokenType) (SymbolKey_GetSymKey (ReservedWords, CurrentToken));
}
else
{
if (QuoteChar == '"')
{
PushBackInput_WarnError ((const char *) "missing \" at the end of a literal", 33);
}
else
{
PushBackInput_WarnError ((const char *) "missing ' at the end of a literal", 33);
}
InQuote = FALSE; /* to avoid a contineous list of the same error message */
}
}
else
{
while ((((i < MaxNameLength) && ((bnflex_PutChar (bnflex_GetChar ())) != ASCII_nul)) && ((bnflex_PutChar (bnflex_GetChar ())) != ASCII_lf)) && ((bnflex_PutChar (bnflex_GetChar ())) != QuoteChar))
{
a.array[i] = bnflex_GetChar ();
i += 1;
}
if ((bnflex_PutChar (bnflex_GetChar ())) == QuoteChar)
{
CurrentType = bnflex_literaltok;
a.array[i] = ASCII_nul;
CurrentToken = NameKey_MakeKey ((const char *) &a.array[0], MaxNameLength);
}
else
{
if (QuoteChar == '"')
{
PushBackInput_WarnError ((const char *) "missing \" at the end of a literal", 33);
}
else
{
PushBackInput_WarnError ((const char *) "missing ' at the end of a literal", 33);
}
InQuote = FALSE; /* to avoid a contineous list of the same error message */
}
}
}
else
{
SkipComments ();
if (((bnflex_PutChar (bnflex_GetChar ())) == '"') || ((bnflex_PutChar (bnflex_GetChar ())) == '\''))
{
a.array[i] = bnflex_GetChar ();
QuoteChar = a.array[i];
i += 1;
InQuote = TRUE;
a.array[i] = ASCII_nul;
CurrentToken = NameKey_MakeKey ((const char *) &a.array[0], MaxNameLength);
CurrentType = (bnflex_TokenType) (SymbolKey_GetSymKey (ReservedWords, CurrentToken));
}
else
{
while (((((i < MaxNameLength) && ((bnflex_PutChar (bnflex_GetChar ())) != ASCII_nul)) && ((bnflex_PutChar (bnflex_GetChar ())) != ASCII_lf)) && ((bnflex_PutChar (bnflex_GetChar ())) != QuoteChar)) && (! (IsWhite (bnflex_PutChar (bnflex_GetChar ())))))
{
a.array[i] = bnflex_GetChar ();
i += 1;
}
a.array[i] = ASCII_nul;
CurrentToken = NameKey_MakeKey ((const char *) &a.array[0], MaxNameLength);
if ((SymbolKey_GetSymKey (ReservedWords, CurrentToken)) == 0)
{
CurrentType = bnflex_identtok;
}
else
{
CurrentType = (bnflex_TokenType) (SymbolKey_GetSymKey (ReservedWords, CurrentToken));
}
}
}
if (Debugging)
{
WriteToken ();
}
}
/*
IsReserved - returns TRUE if the name is a reserved word.
*/
extern "C" unsigned int bnflex_IsReserved (NameKey_Name name)
{
return (SymbolKey_GetSymKey (ReservedWords, name)) != 0;
/* static analysis guarentees a RETURN statement will be used before here. */
__builtin_unreachable ();
}
/*
PushBackToken - pushes a token back onto input.
*/
extern "C" void bnflex_PushBackToken (NameKey_Name t)
{
typedef struct PushBackToken__T3_a PushBackToken__T3;
struct PushBackToken__T3_a { char array[MaxNameLength+1]; };
PushBackToken__T3 a;
NameKey_GetKey (t, (char *) &a.array[0], MaxNameLength);
PushBackInput_PutString ((const char *) &a.array[0], MaxNameLength);
}
/*
SetDebugging - sets the debugging flag.
*/
extern "C" void bnflex_SetDebugging (unsigned int flag)
{
Debugging = flag;
}
extern "C" void _M2_bnflex_init (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
Init ();
}
extern "C" void _M2_bnflex_fini (__attribute__((unused)) int argc,__attribute__((unused)) char *argv[],__attribute__((unused)) char *envp[])
{
}