/**************************************************************************
f i c l E x e c X T
** Given a pointer to a FICL_WORD, push an inner interpreter and
** execute the word to completion. This is in contrast with vmExecute,
** which does not guarantee that the word will have completed when
** the function returns (ie in the case of colon definitions, which
** need an inner interpreter to finish)
**
** Returns one of the VM_XXXX exception codes listed in ficl.h. Normal
** exit condition is VM_INNEREXIT, ficl's private signal to exit the
** inner loop under normal circumstances. If another code is thrown to
** exit the loop, this function will re-throw it if it's nested under
** itself or ficlExec.
**
** NOTE: this function is intended so that C code can execute ficlWords
** given their address in the dictionary (xt).
**************************************************************************/
int ficlExecXT(FICL_VM *pVM, FICL_WORD *pWord)
{
int except;
jmp_buf vmState;
jmp_buf *oldState;
FICL_WORD *oldRunningWord;
assert(pVM);
assert(pVM->pSys->pExitInner);
/*
** Save the runningword so that RESTART behaves correctly
** over nested calls.
*/
oldRunningWord = pVM->runningWord;
/*
** Save and restore VM's jmp_buf to enable nested calls
*/
oldState = pVM->pState;
pVM->pState = &vmState; /* This has to come before the setjmp! */
except = setjmp(vmState);
if (except)
vmPopIP(pVM);
else
vmPushIP(pVM, &(pVM->pSys->pExitInner));
switch (except)
{
case 0:
vmExecute(pVM, pWord);
vmInnerLoop(pVM);
break;
case VM_INNEREXIT:
case VM_BREAK:
break;
case VM_RESTART:
case VM_OUTOFTEXT:
case VM_USEREXIT:
case VM_QUIT:
case VM_ERREXIT:
case VM_ABORT:
case VM_ABORTQ:
default: /* user defined exit code?? */
if (oldState)
{
pVM->pState = oldState;
vmThrow(pVM, except);
}
break;
}
pVM->pState = oldState;
pVM->runningWord = oldRunningWord;
return (except);
}
/*
** Dump a tab delimited file that summarizes the contents of the
** dictionary hash table by hashcode...
*/
static void spewHash(FICL_VM *pVM)
{
FICL_HASH *pHash = vmGetDict(pVM)->pForthWords;
FICL_WORD *pFW;
FILE *pOut;
unsigned i;
unsigned nHash = pHash->size;
if (!vmGetWordToPad(pVM))
vmThrow(pVM, VM_OUTOFTEXT);
pOut = fopen(pVM->pad, "w");
if (!pOut)
{
vmTextOut(pVM, "unable to open file", 1);
return;
}
for (i=0; i < nHash; i++)
{
int n = 0;
pFW = pHash->table[i];
while (pFW)
{
n++;
pFW = pFW->link;
}
fprintf(pOut, "%d\t%d", i, n);
pFW = pHash->table[i];
while (pFW)
{
fprintf(pOut, "\t%s", pFW->name);
pFW = pFW->link;
}
fprintf(pOut, "\n");
}
fclose(pOut);
return;
}
/*
** Ficl interface to chdir
** Gets a newline (or NULL) delimited string from the input
** and feeds it to chdir()
** Example:
** cd c:\tmp
*/
static void ficlChDir(FICL_VM *pVM)
{
FICL_STRING *pFS = (FICL_STRING *)pVM->pad;
vmGetString(pVM, pFS, '\n');
if (pFS->count > 0)
{
int err = chdir(pFS->text);
if (err)
{
vmTextOut(pVM, "Error: path not found", 1);
vmThrow(pVM, VM_QUIT);
}
}
else
{
vmTextOut(pVM, "Warning (chdir): nothing happened", 1);
}
return;
}
/*
** Ficl interface to system (ANSI)
** Gets a newline (or NULL) delimited string from the input
** and feeds it to system()
** Example:
** system rm -rf /
** \ ouch!
*/
static void ficlSystem(FICL_VM *pVM)
{
FICL_STRING *pFS = (FICL_STRING *)pVM->pad;
vmGetString(pVM, pFS, '\n');
if (pFS->count > 0)
{
int err = system(pFS->text);
if (err)
{
sprintf(pVM->pad, "System call returned %d", err);
vmTextOut(pVM, pVM->pad, 1);
vmThrow(pVM, VM_QUIT);
}
}
else
{
vmTextOut(pVM, "Warning (system): nothing happened", 1);
}
return;
}
static void ficlLoad(FICL_VM *pVM)
{
char cp[nLINEBUF];
char filename[nLINEBUF];
FICL_STRING *pFilename = (FICL_STRING *)filename;
int nLine = 0;
FILE *fp;
int result;
CELL id;
struct stat buf;
vmGetString(pVM, pFilename, '\n');
if (pFilename->count <= 0)
{
vmTextOut(pVM, "Warning (load): nothing happened", 1);
return;
}
/*
** get the file's size and make sure it exists
*/
result = stat( pFilename->text, &buf );
if (result != 0)
{
vmTextOut(pVM, "Unable to stat file: ", 0);
vmTextOut(pVM, pFilename->text, 1);
vmThrow(pVM, VM_QUIT);
}
fp = fopen(pFilename->text, "r");
if (!fp)
{
vmTextOut(pVM, "Unable to open file ", 0);
vmTextOut(pVM, pFilename->text, 1);
vmThrow(pVM, VM_QUIT);
}
id = pVM->sourceID;
pVM->sourceID.p = (void *)fp;
/* feed each line to ficlExec */
while (fgets(cp, nLINEBUF, fp))
{
int len = strlen(cp) - 1;
nLine++;
if (len <= 0)
continue;
result = ficlExecC(pVM, cp, len);
if (result != VM_QUIT && result != VM_USEREXIT && result != VM_OUTOFTEXT )
{
pVM->sourceID = id;
fclose(fp);
vmThrowErr(pVM, "Error loading file <%s> line %d", pFilename->text, nLine);
break;
}
}
/*
** Pass an empty line with SOURCE-ID == -1 to flush
** any pending REFILLs (as required by FILE wordset)
*/
pVM->sourceID.i = -1;
ficlExec(pVM, "");
pVM->sourceID = id;
fclose(fp);
/* handle "bye" in loaded files. --lch */
if (result == VM_USEREXIT)
vmThrow(pVM, VM_USEREXIT);
return;
}
/*
* Shim for taking commands from BF and passing them out to 'standard'
* argv/argc command functions.
*/
static void
bf_command(FICL_VM *vm)
{
char *name, *line, *tail, *cp;
size_t len;
struct bootblk_command **cmdp;
bootblk_cmd_t *cmd;
int nstrings, i;
int argc, result;
char **argv;
/* Get the name of the current word */
name = vm->runningWord->name;
/* Find our command structure */
cmd = NULL;
SET_FOREACH(cmdp, Xcommand_set) {
if (((*cmdp)->c_name != NULL) && !strcmp(name, (*cmdp)->c_name))
cmd = (*cmdp)->c_fn;
}
if (cmd == NULL)
panic("callout for unknown command '%s'", name);
/* Check whether we have been compiled or are being interpreted */
if (stackPopINT(vm->pStack)) {
/*
* Get parameters from stack, in the format:
* an un ... a2 u2 a1 u1 n --
* Where n is the number of strings, a/u are pairs of
* address/size for strings, and they will be concatenated
* in LIFO order.
*/
nstrings = stackPopINT(vm->pStack);
for (i = 0, len = 0; i < nstrings; i++)
len += stackFetch(vm->pStack, i * 2).i + 1;
line = malloc(strlen(name) + len + 1);
strcpy(line, name);
if (nstrings)
for (i = 0; i < nstrings; i++) {
len = stackPopINT(vm->pStack);
cp = stackPopPtr(vm->pStack);
strcat(line, " ");
strncat(line, cp, len);
}
} else {
/* Get remainder of invocation */
tail = vmGetInBuf(vm);
for (cp = tail, len = 0; cp != vm->tib.end && *cp != 0 && *cp != '\n'; cp++, len++)
;
line = malloc(strlen(name) + len + 2);
strcpy(line, name);
if (len > 0) {
strcat(line, " ");
strncat(line, tail, len);
vmUpdateTib(vm, tail + len);
}
}
DEBUG("cmd '%s'", line);
command_errmsg = command_errbuf;
command_errbuf[0] = 0;
if (!parse(&argc, &argv, line)) {
result = (cmd)(argc, argv);
free(argv);
} else {
result=BF_PARSE;
}
free(line);
/*
* If there was error during nested ficlExec(), we may no longer have
* valid environment to return. Throw all exceptions from here.
*/
if (result != 0)
vmThrow(vm, result);
/* This is going to be thrown!!! */
stackPushINT(vm->pStack,result);
}
