ref: 48c34238eb82bd06790985c8cce303d3cbba984f
dir: /src/asm/fstack.c/
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* INCLUDES
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "symbol.h"
#include "fstack.h"
#include "types.h"
#include "main.h"
#include "lexer.h"
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* VARIABLES
*
*/
struct sContext *pFileStack;
struct sSymbol *pCurrentMacro;
YY_BUFFER_STATE CurrentFlexHandle;
FILE *pCurrentFile;
ULONG nCurrentStatus;
char tzCurrentFileName[_MAX_PATH + 1];
char IncludePaths[MAXINCPATHS][_MAX_PATH + 1];
SLONG NextIncPath = 0;
ULONG nMacroCount;
char *pCurrentREPTBlock;
ULONG nCurrentREPTBlockSize;
ULONG nCurrentREPTBlockCount;
ULONG ulMacroReturnValue;
/*
* defines for nCurrentStatus
*/
#define STAT_isInclude 0
#define STAT_isMacro 1
#define STAT_isMacroArg 2
#define STAT_isREPTBlock 3
ULONG filesize (char *s)
{
FILE *f;
ULONG size = 0;
if( (f=fopen(s,"rt"))!=NULL )
{
fseek (f, 0, SEEK_END);
size = ftell (f);
fclose (f);
}
return (size);
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Context push and pop
*
*/
void pushcontext (void)
{
struct sContext **ppFileStack;
ppFileStack = &pFileStack;
while (*ppFileStack)
ppFileStack = &((*ppFileStack)->pNext);
if( (*ppFileStack=(struct sContext *)malloc(sizeof (struct sContext)))!=NULL )
{
(*ppFileStack)->FlexHandle = CurrentFlexHandle;
(*ppFileStack)->pNext = NULL;
strcpy ( (char *)(*ppFileStack)->tzFileName, (char *)tzCurrentFileName);
(*ppFileStack)->nLine = nLineNo;
switch ((*ppFileStack)->nStatus = nCurrentStatus)
{
case STAT_isMacroArg:
case STAT_isMacro:
sym_SaveCurrentMacroArgs ((*ppFileStack)->tzMacroArgs);
(*ppFileStack)->pMacro = pCurrentMacro;
break;
case STAT_isInclude:
(*ppFileStack)->pFile = pCurrentFile;
break;
case STAT_isREPTBlock:
sym_SaveCurrentMacroArgs ((*ppFileStack)->tzMacroArgs);
(*ppFileStack)->pREPTBlock = pCurrentREPTBlock;
(*ppFileStack)->nREPTBlockSize = nCurrentREPTBlockSize;
(*ppFileStack)->nREPTBlockCount = nCurrentREPTBlockCount;
break;
}
nLineNo = 0;
}
else
fatalerror ("No memory for context");
}
int popcontext (void)
{
struct sContext *pLastFile,
**ppLastFile;
if (nCurrentStatus == STAT_isREPTBlock)
{
if (--nCurrentREPTBlockCount)
{
yy_delete_buffer (CurrentFlexHandle);
CurrentFlexHandle = yy_scan_bytes (pCurrentREPTBlock, nCurrentREPTBlockSize);
yy_switch_to_buffer (CurrentFlexHandle);
sym_UseCurrentMacroArgs ();
sym_SetMacroArgID (nMacroCount++);
sym_UseNewMacroArgs ();
return (0);
}
}
if( (pLastFile=pFileStack)!=NULL )
{
ppLastFile = &pFileStack;
while (pLastFile->pNext)
{
ppLastFile = &(pLastFile->pNext);
pLastFile = *ppLastFile;
}
yy_delete_buffer (CurrentFlexHandle);
nLineNo = pLastFile->nLine;
if (nCurrentStatus == STAT_isInclude)
fclose (pCurrentFile);
if (nCurrentStatus == STAT_isMacro)
{
sym_FreeCurrentMacroArgs ();
nLineNo += 1;
}
if (nCurrentStatus == STAT_isREPTBlock)
nLineNo += 1;
CurrentFlexHandle = pLastFile->FlexHandle;
strcpy ((char *)tzCurrentFileName, (char *)pLastFile->tzFileName);
switch (nCurrentStatus = pLastFile->nStatus)
{
case STAT_isMacroArg:
case STAT_isMacro:
sym_RestoreCurrentMacroArgs (pLastFile->tzMacroArgs);
pCurrentMacro = pLastFile->pMacro;
break;
case STAT_isInclude:
pCurrentFile = pLastFile->pFile;
break;
case STAT_isREPTBlock:
sym_RestoreCurrentMacroArgs (pLastFile->tzMacroArgs);
pCurrentREPTBlock = pLastFile->pREPTBlock;
nCurrentREPTBlockSize = pLastFile->nREPTBlockSize;
nCurrentREPTBlockCount = pLastFile->nREPTBlockCount;
break;
}
free (*ppLastFile);
*ppLastFile = NULL;
yy_switch_to_buffer (CurrentFlexHandle);
return (0);
}
else
return (1);
}
int yywrap (void)
{
return (popcontext ());
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Dump the context stack to stdout
*
*/
void fstk_Dump (void)
{
struct sContext *pLastFile;
pLastFile = pFileStack;
while (pLastFile)
{
printf ("%s(%ld) -> ", pLastFile->tzFileName, pLastFile->nLine);
pLastFile = pLastFile->pNext;
}
printf ("%s(%ld)", tzCurrentFileName, nLineNo);
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Extra includepath stuff
*
*/
void fstk_AddIncludePath (char *s)
{
strcpy (IncludePaths[NextIncPath++], s);
}
void fstk_FindFile (char *s)
{
char t[_MAX_PATH + 1];
SLONG i = -1;
strcpy (t, s);
while (i < NextIncPath)
{
FILE *f;
if( (f=fopen(t,"rb"))!=NULL )
{
fclose (f);
strcpy (s, t);
return;
}
i += 1;
if (i < NextIncPath)
{
strcpy (t, IncludePaths[i]);
strcat (t, s);
}
}
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Set up an include file for parsing
*
*/
ULONG fstk_RunInclude (char *s)
{
FILE *f;
char tzFileName[_MAX_PATH + 1];
//printf( "INCLUDE: %s\n", s );
strcpy (tzFileName, s);
fstk_FindFile (tzFileName);
//printf( "INCLUDING: %s\n", tzFileName );
if( (f=fopen(tzFileName,"rt"))!=NULL )
{
pushcontext ();
nLineNo = 1;
nCurrentStatus = STAT_isInclude;
strcpy (tzCurrentFileName, tzFileName);
pCurrentFile = f;
CurrentFlexHandle = yy_create_buffer (pCurrentFile);
yy_switch_to_buffer (CurrentFlexHandle);
// Dirty hack to give the INCLUDE directive a linefeed
yyunput( '\n' );
nLineNo-=1;
return (1);
}
else
return (0);
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Set up a macro for parsing
*
*/
ULONG fstk_RunMacro (char *s)
{
struct sSymbol *sym;
if( (sym=sym_FindMacro(s))!=NULL )
{
pushcontext ();
sym_SetMacroArgID (nMacroCount++);
nLineNo = -1;
sym_UseNewMacroArgs ();
nCurrentStatus = STAT_isMacro;
strcpy (tzCurrentFileName, s);
pCurrentMacro = sym;
CurrentFlexHandle = yy_scan_bytes (pCurrentMacro->pMacro, pCurrentMacro->ulMacroSize);
yy_switch_to_buffer (CurrentFlexHandle);
return (1);
}
else
return (0);
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Set up a macroargument for parsing
*
*/
void fstk_RunMacroArg (SLONG s)
{
char *sym;
if (s == '@')
s = -1;
else
s -= '0';
if( (sym=sym_FindMacroArg(s))!=NULL )
{
pushcontext ();
nCurrentStatus = STAT_isMacroArg;
sprintf (tzCurrentFileName, "%c", (UBYTE)s);
CurrentFlexHandle = yy_scan_bytes (sym, strlen (sym));
yy_switch_to_buffer (CurrentFlexHandle);
}
else
fatalerror ("No such macroargument");
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Set up a stringequate for parsing
*
*/
void fstk_RunString (char *s)
{
struct sSymbol *pSym;
if( (pSym=sym_FindSymbol(s))!=NULL )
{
pushcontext ();
nCurrentStatus = STAT_isMacroArg;
strcpy (tzCurrentFileName, s);
CurrentFlexHandle = yy_scan_bytes (pSym->pMacro, strlen (pSym->pMacro));
yy_switch_to_buffer (CurrentFlexHandle);
}
else
yyerror ("No such string symbol");
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Set up a repeat block for parsing
*
*/
void fstk_RunRept (ULONG count)
{
if (count)
{
pushcontext ();
sym_UseCurrentMacroArgs ();
sym_SetMacroArgID (nMacroCount++);
sym_UseNewMacroArgs ();
nCurrentREPTBlockCount = count;
nCurrentStatus = STAT_isREPTBlock;
nCurrentREPTBlockSize = ulNewMacroSize;
pCurrentREPTBlock = tzNewMacro;
CurrentFlexHandle = yy_scan_bytes (pCurrentREPTBlock, nCurrentREPTBlockSize);
yy_switch_to_buffer (CurrentFlexHandle);
}
}
/*
* RGBAsm - FSTACK.C (FileStack routines)
*
* Initialize the filestack routines
*
*/
ULONG fstk_Init (char *s)
{
char tzFileName[_MAX_PATH + 1];
sym_AddString ("__FILE__", s);
strcpy (tzFileName, s);
fstk_FindFile (tzFileName);
pFileStack = NULL;
if( (pCurrentFile=fopen(tzFileName,"rt"))!=NULL )
{
nMacroCount = 0;
nCurrentStatus = STAT_isInclude;
strcpy (tzCurrentFileName, tzFileName);
CurrentFlexHandle = yy_create_buffer (pCurrentFile);
yy_switch_to_buffer (CurrentFlexHandle);
nLineNo = 1;
return (1);
}
else
return (0);
}