diogo/yap-6.3
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don't consume char after '.', do peek instead.

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early errors should leave early.
This commit is contained in:
Vítor Santos Costa 2016-02-14 04:11:55 +00:00
parent df0b3d3a0d
commit 92cb3e34eb
1 changed files with 90 additions and 77 deletions
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145
C/scanner.c
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@ -563,44 +563,38 @@ typedef struct scanner_extra_alloc {
void *filler;
} ScannerExtraBlock;
static TokEntry *
CodeSpaceError(TokEntry *t, TokEntry *p, TokEntry *l)
{
LOCAL_Error_TYPE = RESOURCE_ERROR_HEAP;
LOCAL_ErrorMessage = "Code Space Overflow";
if (t) {
t->Tok = eot_tok;
t->TokInfo = TermOutOfHeapError;
}
/* serious error now */
return l;
}
static TokEntry *
TrailSpaceError(TokEntry *t, TokEntry *l)
{
LOCAL_ErrorMessage = "Trail Overflow";
LOCAL_Error_TYPE = RESOURCE_ERROR_TRAIL;
if (t) {
t->Tok = eot_tok;
t->TokInfo = TermOutOfTrailError;
}
return l;
static TokEntry *CodeSpaceError(TokEntry *t, TokEntry *p, TokEntry *l) {
LOCAL_Error_TYPE = RESOURCE_ERROR_HEAP;
LOCAL_ErrorMessage = "Code Space Overflow";
if (t) {
t->Tok = eot_tok;
t->TokInfo = TermOutOfHeapError;
}
/* serious error now */
return l;
}
static TokEntry *
AuxSpaceError(TokEntry *p, TokEntry *l, const char *msg)
{
/* huge atom or variable, we are in trouble */
LOCAL_ErrorMessage = (char *)msg;
LOCAL_Error_TYPE = RESOURCE_ERROR_AUXILIARY_STACK;
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
if (p) {
p->Tok = eot_tok;
p->TokInfo = TermOutOfAuxspaceError;
}
/* serious error now */
return l;
static TokEntry *TrailSpaceError(TokEntry *t, TokEntry *l) {
LOCAL_ErrorMessage = "Trail Overflow";
LOCAL_Error_TYPE = RESOURCE_ERROR_TRAIL;
if (t) {
t->Tok = eot_tok;
t->TokInfo = TermOutOfTrailError;
}
return l;
}
static TokEntry *AuxSpaceError(TokEntry *p, TokEntry *l, const char *msg) {
/* huge atom or variable, we are in trouble */
LOCAL_ErrorMessage = (char *)msg;
LOCAL_Error_TYPE = RESOURCE_ERROR_AUXILIARY_STACK;
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
if (p) {
p->Tok = eot_tok;
p->TokInfo = TermOutOfAuxspaceError;
}
/* serious error now */
return l;
}
static void InitScannerMemory(void) {
@ -1221,10 +1215,10 @@ Term Yap_scan_num(StreamDesc *inp) {
LOCAL_ErrorMessage = "Stack Overflow"; \
LOCAL_Error_TYPE = RESOURCE_ERROR_STACK; \
LOCAL_Error_Size = 0L; \
if (p) { \
if (p) { \
p->Tok = Ord(kind = eot_tok); \
p->TokInfo = TermOutOfStackError; \
} \
} \
/* serious error now */ \
return l; \
}
@ -1403,7 +1397,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
LOCAL_StartLineCount = inp_stream->linecount;
LOCAL_StartLinePos = inp_stream->linepos;
do {
wchar_t och;
wchar_t och, pch;
int quote, isvar;
char *charp, *mp;
unsigned int len;
@ -1506,7 +1500,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
ae = Yap_LookupAtom(TokImage);
}
if (ae == NIL) {
return CodeSpaceError(t, p, l);
return CodeSpaceError(t, p, l);
}
t->TokInfo = Unsigned(ae);
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
@ -1531,8 +1525,8 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
cherr = 0;
if (!(ptr = AllocScannerMemory(4096))) {
return TrailSpaceError(t, l);
}
return TrailSpaceError(t, l);
}
CHECK_SPACE();
if ((t->TokInfo = get_num(&cha, &cherr, inp_stream, ptr, 4096, 1)) ==
0L) {
@ -1551,7 +1545,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
t->TokPos = GetCurInpPos(inp_stream);
e = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
if (e == NULL) {
return TrailSpaceError(p, l);
return TrailSpaceError(p, l);
} else {
e->TokNext = NULL;
@ -1576,7 +1570,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
t->TokPos = GetCurInpPos(inp_stream);
e2 = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
if (e2 == NULL) {
return TrailSpaceError(p, l);
return TrailSpaceError(p, l);
} else {
e2->TokNext = NULL;
}
@ -1602,7 +1596,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
t->TokPos = GetCurInpPos(inp_stream);
e2 = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
if (e2 == NULL) {
return TrailSpaceError(p, l);
return TrailSpaceError(p, l);
} else {
e2->TokNext = NULL;
}
@ -1669,8 +1663,9 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
++len;
if (charp > (char *)AuxSp - 1024) {
/* Not enough space to read in the string. */
return AuxSpaceError(t, l, "not enough space to read in string or quoted atom");
}
return AuxSpaceError(
t, l, "not enough space to read in string or quoted atom");
}
}
if (wcharp) {
*wcharp = '\0';
@ -1718,8 +1713,8 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
t->TokInfo = Unsigned(Yap_LookupAtom(TokImage));
}
if (!(t->TokInfo)) {
return CodeSpaceError(t, p, l);
}
return CodeSpaceError(t, p, l);
}
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
t->Tok = Ord(kind = Name_tok);
if (ch == '(')
@ -1730,12 +1725,29 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
case BS:
if (ch == '\0') {
t->Tok = Ord(kind = eot_tok);
if (chtype(pch) == EF) {
mark_eof(inp_stream);
t->TokInfo = TermEof;
} else {
t->TokInfo = TermNewLine;
}
t->TokInfo = TermEof;
return l;
} else
ch = getchr(inp_stream);
break;
case SY:
if (ch == '.' && (pch = Yap_peek(inp_stream - GLOBAL_Stream)) &&
(chtype(pch) == BS || chtype(pch) == EF || pch == '%')) {
t->Tok = Ord(kind = eot_tok);
if (chtype(ch) == EF) {
mark_eof(inp_stream);
t->TokInfo = TermEof;
} else {
t->TokInfo = TermNewLine;
}
return l;
}
if (ch == '`')
goto quoted_string;
och = ch;
@ -1747,7 +1759,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
mark_eof(inp_stream);
t->TokInfo = TermEof;
} else {
t->TokInfo = TermNewLine;
t->TokInfo = TermNewLine;
}
return l;
}
@ -1798,9 +1810,9 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
if (chtype(ch) == EF) {
mark_eof(inp_stream);
t->TokInfo = TermEof;
} else {
} else {
t->TokInfo = TermNl;
}
}
return l;
} else {
Atom ae;
@ -1822,12 +1834,12 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
ae = Yap_LookupAtom(TokImage);
}
if (ae == NIL) {
return CodeSpaceError(t, p, l);
return CodeSpaceError(t, p, l);
}
t->TokInfo = Unsigned(ae);
if (t->TokInfo == (CELL)NIL) {
return CodeSpaceError(t, p, l);
}
return CodeSpaceError(t, p, l);
}
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
t->Tok = Ord(kind = Name_tok);
if (ch == '(')
@ -1891,7 +1903,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
LOCAL_ErrorMessage = "quasi quote in quasi quote";
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
t->Tok = Ord(kind = eot_tok);
t->TokInfo = TermOutOfHeapError;
t->TokInfo = TermOutOfHeapError;
free(qq);
return l;
} else {
@ -1982,7 +1994,8 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
}
if (charp > (char *)AuxSp - 1024) {
/* Not enough space to read in the string. */
return AuxSpaceError(t, l, "not enough space to read in string or quoted atom");
return AuxSpaceError(
t, l, "not enough space to read in string or quoted atom");
}
}
len = charp - TokImage;
@ -2006,7 +2019,7 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
qq->end.linepos = inp_stream->linepos - 1;
qq->end.charno = inp_stream->charcount - 1;
if (!(t->TokInfo)) {
return CodeSpaceError(t, p, l);
return CodeSpaceError(t, p, l);
}
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
solo_flag = FALSE;
@ -2021,14 +2034,14 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
t->TokInfo = TermEof;
return l;
default:
{
char err[1024];
snprintf( err, 1023, "\n++++ token: unrecognised char %c (%d), type %c\n", ch, ch, chtype(ch) );
default: {
char err[1024];
snprintf(err, 1023, "\n++++ token: unrecognised char %c (%d), type %c\n",
ch, ch, chtype(ch));
#if DEBUG
fprintf(stderr, "%s", err);
fprintf(stderr, "%s", err);
#endif
}
}
t->Tok = Ord(kind = eot_tok);
t->TokInfo = TermEof;
}
@ -2040,8 +2053,8 @@ TokEntry *Yap_tokenizer(struct stream_desc *inp_stream, bool store_comments,
/* insert an error token to inform the system of what happened */
TokEntry *e = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
if (e == NULL) {
return TrailSpaceError(p, l);
}
return TrailSpaceError(p, l);
}
p->TokNext = e;
e->Tok = Error_tok;
e->TokInfo = MkAtomTerm(Yap_LookupAtom(LOCAL_ErrorMessage));