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/* Local variables and the run time stack. */
/* #includes */ /*{{{C}}}*//*{{{*/
#undef _POSIX_SOURCE
#define _POSIX_SOURCE 1
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 2
#include "config.h"
#include <assert.h>
#include <ctype.h>
#ifdef HAVE_GETTEXT
#include <libintl.h>
#define _(String) gettext(String)
#else
#define _(String) String
#endif
#include <stdlib.h>
#include <string.h>
#include "auto.h"
#ifdef USE_DMALLOC
#include "dmalloc.h"
#endif
/*}}}*/
/* #defines */ /*{{{*/
#define INCREASE_STACK 16
/*}}}*/
/* interpretation methods */
struct Auto *Auto_new(struct Auto *this) /*{{{*/
{
this->stackPointer=0;
this->stackCapacity=0;
this->framePointer=0;
this->frameSize=0;
this->onerror.line=-1;
this->erl=0;
Value_new_NIL(&this->err);
Value_new_NIL(&this->lastdet);
this->begindata.line=-1;
this->slot=(union AutoSlot*)0;
this->cur=this->all=(struct Symbol*)0;
return this;
}
/*}}}*/
void Auto_destroy(struct Auto *this) /*{{{*/
{
struct Symbol *l;
Value_destroy(&this->err);
Value_destroy(&this->lastdet);
if (this->stackCapacity) free(this->slot);
for (l=this->all; l!=(struct Symbol*)0; )
{
struct Symbol *f;
f=l;
l=l->next;
free(f->name);
free(f);
}
}
/*}}}*/
struct Var *Auto_pushArg(struct Auto *this) /*{{{*/
{
if ((this->stackPointer+1)>=this->stackCapacity)
{
this->slot=realloc(this->slot,sizeof(this->slot[0])*(this->stackCapacity?(this->stackCapacity=this->stackPointer+INCREASE_STACK):(this->stackCapacity=INCREASE_STACK)));
}
return &this->slot[this->stackPointer++].var;
}
/*}}}*/
void Auto_pushFuncRet(struct Auto *this, int firstarg, struct Pc *pc) /*{{{*/
{
if (this->stackPointer+2>=this->stackCapacity)
{
this->slot=realloc(this->slot,sizeof(this->slot[0])*(this->stackCapacity?(this->stackCapacity=this->stackCapacity+INCREASE_STACK):(this->stackCapacity=INCREASE_STACK)));
}
this->slot[this->stackPointer].retException.onerror=this->onerror;
this->slot[this->stackPointer].retException.resumeable=this->resumeable;
++this->stackPointer;
this->slot[this->stackPointer].retFrame.pc=*pc;
this->slot[this->stackPointer].retFrame.framePointer=this->framePointer;
this->slot[this->stackPointer].retFrame.frameSize=this->frameSize;
++this->stackPointer;
this->framePointer=firstarg;
this->frameSize=this->stackPointer-firstarg;
this->onerror.line=-1;
}
/*}}}*/
void Auto_pushGosubRet(struct Auto *this, struct Pc *pc) /*{{{*/
{
if ((this->stackPointer+1)>=this->stackCapacity)
{
this->slot=realloc(this->slot,sizeof(this->slot[0])*(this->stackCapacity?(this->stackCapacity=this->stackPointer+INCREASE_STACK):(this->stackCapacity=INCREASE_STACK)));
}
this->slot[this->stackPointer].retFrame.pc=*pc;
++this->stackPointer;
}
/*}}}*/
struct Var *Auto_local(struct Auto *this, int l) /*{{{*/
{
assert(this->frameSize>(l+2));
return &(this->slot[this->framePointer+l].var);
}
/*}}}*/
int Auto_funcReturn(struct Auto *this, struct Pc *pc) /*{{{*/
{
int i,retFrame,retException;
if (this->stackPointer==0) return 0;
assert(this->frameSize);
retFrame=this->framePointer+this->frameSize-1;
retException=this->framePointer+this->frameSize-2;
assert(retException>=0 && retFrame<this->stackPointer);
for (i=0; i<this->frameSize-2; ++i) Var_destroy(&this->slot[this->framePointer+i].var);
this->stackPointer=this->framePointer;
if (pc!=(struct Pc*)0) *pc=this->slot[retFrame].retFrame.pc;
this->frameSize=this->slot[retFrame].retFrame.frameSize;
this->framePointer=this->slot[retFrame].retFrame.framePointer;
this->onerror=this->slot[retException].retException.onerror;
return 1;
}
/*}}}*/
int Auto_gosubReturn(struct Auto *this, struct Pc *pc) /*{{{*/
{
if (this->stackPointer<=this->framePointer+this->frameSize) return 0;
--this->stackPointer;
if (pc) *pc=this->slot[this->stackPointer].retFrame.pc;
return 1;
}
/*}}}*/
void Auto_frameToError(struct Auto *this, struct Program *program, struct Value *v) /*{{{*/
{
int i=this->stackPointer,framePointer,frameSize,retFrame;
struct Pc p;
framePointer=this->framePointer;
frameSize=this->frameSize;
while (i>framePointer+frameSize)
{
p=this->slot[--i].retFrame.pc;
Value_errorSuffix(v,_("Called"));
Program_PCtoError(program,&p,v);
}
if (i)
{
retFrame=framePointer+frameSize-1;
i=framePointer;
p=this->slot[retFrame].retFrame.pc;
frameSize=this->slot[retFrame].retFrame.frameSize;
framePointer=this->slot[retFrame].retFrame.framePointer;
Value_errorSuffix(v,_("Proc Called"));
Program_PCtoError(program,&p,v);
}
}
/*}}}*/
void Auto_setError(struct Auto *this, long int line, struct Pc *pc, struct Value *v) /*{{{*/
{
this->erpc=*pc;
this->erl=line;
Value_destroy(&this->err);
Value_clone(&this->err,v);
}
/*}}}*/
/* compilation methods */
int Auto_find(struct Auto *this, struct Identifier *ident) /*{{{*/
{
struct Symbol *find;
for (find=this->cur; find!=(struct Symbol*)0; find=find->next)
{
const char *s=ident->name;
const char *r=find->name;
while (*s && tolower(*s)==tolower(*r)) { ++s; ++r; };
if (tolower(*s)==tolower(*r))
{
ident->sym=find;
return 1;
}
}
return 0;
}
/*}}}*/
int Auto_variable(struct Auto *this, const struct Identifier *ident) /*{{{*/
{
struct Symbol **tail;
int offset;
for (offset=0,tail=&this->cur; *tail!=(struct Symbol*)0; tail=&(*tail)->next,++offset)
{
const char *s=ident->name;
const char *r=(*tail)->name;
while (*s && tolower(*s)==tolower(*r)) { ++s; ++r; };
if (tolower(*s)==tolower(*r)) return 0;
}
(*tail)=malloc(sizeof(struct Symbol));
(*tail)->next=(struct Symbol*)0;
(*tail)->name=strcpy(malloc(strlen(ident->name)+1),ident->name);
(*tail)->type=LOCALVAR;
(*tail)->u.local.type=ident->defaultType;
/* the offset -1 of the V_VOID procedure return symbol is ok, it is not used */
(*tail)->u.local.offset=offset-(this->cur->u.local.type==V_VOID?1:0);
return 1;
}
/*}}}*/
enum ValueType Auto_argType(const struct Auto *this, int l) /*{{{*/
{
struct Symbol *find;
int offset;
if (this->cur->u.local.type==V_VOID) ++l;
for (offset=0,find=this->cur; l!=offset; find=find->next,++offset) assert(find!=(struct Symbol*)0);
assert(find!=(struct Symbol*)0);
return find->u.local.type;
}
/*}}}*/
enum ValueType Auto_varType(const struct Auto *this, struct Symbol *sym) /*{{{*/
{
struct Symbol *find;
for (find=this->cur; find->u.local.offset!=sym->u.local.offset; find=find->next) assert(find!=(struct Symbol*)0);
assert(find!=(struct Symbol*)0);
return find->u.local.type;
}
/*}}}*/
void Auto_funcEnd(struct Auto *this) /*{{{*/
{
struct Symbol **tail;
for (tail=&this->all; *tail!=(struct Symbol*)0; tail=&(*tail)->next);
*tail=this->cur;
this->cur=(struct Symbol*)0;
}
/*}}}*/
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