1239 lines
37 KiB
C
Executable File
1239 lines
37 KiB
C
Executable File
/*************************************************************************
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* *
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* Yap Prolog *
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* *
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* Yap Prolog Was Developed At Nccup - Universidade Do Porto *
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* *
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* Copyright L.Damas, V.S.Costa And Universidade Do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: errors.c *
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* Last Rev: *
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* Mods: *
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* Comments: Yap's error handlers *
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* *
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*************************************************************************/
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#include "absmi.h"
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#include "yapio.h"
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#if HAVE_STDARG_H
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#include <stdarg.h>
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#endif
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#include <stdlib.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if HAVE_EXECINFO_H
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#include <execinfo.h>
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#endif
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#include "Foreign.h"
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#define set_key_b(k, ks, q, i, t) \
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if (strcmp(ks, q) == 0) { \
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i->k = t == TermTrue ? true : false; \
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return i->k || t == TermFalse; \
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}
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#define set_key_i(k, ks, q, i, t) \
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if (strcmp(ks, q) == 0) { \
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i->k = IsIntegerTerm(t) ? IntegerOfTerm(t) : 0; \
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return IsIntegerTerm(t); \
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}
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#define set_key_s(k, ks, q, i, t) \
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if (strcmp(ks, q) == 0) { \
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const char *s = IsAtomTerm(t) ? RepAtom(AtomOfTerm(t))->StrOfAE \
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: IsStringTerm(t) ? StringOfTerm(t) : NULL; \
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if (s) { \
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char *tmp = malloc(strlen(s) + 1); \
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strcpy(tmp, s); \
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i->k = tmp; \
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} \
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return i->k != NULL; \
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}
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static bool setErr(const char *q, yap_error_descriptor_t *i, Term t) {
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set_key_i(errorNo, "errorNo", q, i, t);
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set_key_i(errorClass, "errorClass", q, i, t);
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set_key_s(errorAsText, "errorAsText", q, i, t);
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set_key_s(errorGoal, "errorGoal", q, i, t);
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set_key_s(classAsText, "classAsText", q, i, t);
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set_key_i(errorLine, "errorLine", q, i, t);
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set_key_s(errorFunction, "errorFunction", q, i, t);
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set_key_s(errorFile, "errorFile", q, i, t);
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set_key_i(prologPredLine, "prologPredLine", q, i, t);
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set_key_i(prologPredFirstLine, "prologPredFirstLine", q, i, t);
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set_key_i(prologPredLastLine, "prologPredLastLine", q, i, t);
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set_key_s(prologPredName, "prologPredName", q, i, t);
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set_key_i(prologPredArity, "prologPredArity", q, i, t);
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set_key_s(prologPredModule, "prologPredModule", q, i, t);
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set_key_s(prologPredFile, "prologPredFile", q, i, t);
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set_key_i(prologParserPos, "prologParserPos", q, i, t);
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set_key_i(prologParserLine, "prologParserLine", q, i, t);
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set_key_i(prologParserFirstLine, "prologParserFirstLine", q, i, t);
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set_key_i(prologParserLastLine, "prologParserLastLine", q, i, t);
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set_key_s(prologParserText, "prologParserText", q, i, t);
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set_key_s(prologParserFile, "prologParserFile", q, i, t);
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set_key_b(prologConsulting, "prologConsulting", q, i, t);
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set_key_s(culprit, "culprit", q, i, t);
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set_key_s(errorMsg, "errorMsg", q, i, t);
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set_key_i(errorMsgLen, "errorMsgLen", q, i, t);
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return false;
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}
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#define query_key_b(k, ks, q, i) \
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if (strcmp(ks, q) == 0) { \
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return i->k ? TermTrue : TermFalse; \
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}
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#define query_key_i(k, ks, q, i) \
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if (strcmp(ks, q) == 0) { \
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return MkIntegerTerm(i->k); \
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}
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#define query_key_s(k, ks, q, i) \
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if (strcmp(ks, q) == 0) { \
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return (i->k && i->k[0] ? MkStringTerm(i->k) : TermNil); \
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}
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static Term queryErr(const char *q, yap_error_descriptor_t *i) {
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query_key_i(errorNo, "errorNo", q, i);
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query_key_i(errorClass, "errorClass", q, i);
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query_key_s(errorAsText, "errorAsText", q, i);
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query_key_s(errorGoal, "errorGoal", q, i);
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query_key_s(classAsText, "classAsText", q, i);
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query_key_i(errorLine, "errorLine", q, i);
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query_key_s(errorFunction, "errorFunction", q, i);
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query_key_s(errorFile, "errorFile", q, i);
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query_key_i(prologPredLine, "prologPredLine", q, i);
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query_key_i(prologPredFirstLine, "prologPredFirstLine", q, i);
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query_key_i(prologPredLastLine, "prologPredLastLine", q, i);
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query_key_s(prologPredName, "prologPredName", q, i);
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query_key_i(prologPredArity, "prologPredArity", q, i);
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query_key_s(prologPredModule, "prologPredModule", q, i);
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query_key_s(prologPredFile, "prologPredFile", q, i);
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query_key_i(prologParserPos, "prologParserPos", q, i);
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query_key_i(prologParserLine, "prologParserLine", q, i);
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query_key_i(prologParserFirstLine, "prologParserFirstLine", q, i);
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query_key_i(prologParserLastLine, "prologParserLastLine", q, i);
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query_key_s(prologParserText, "prologParserText", q, i);
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query_key_s(prologParserFile, "prologParserFile", q, i);
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query_key_b(prologConsulting, "prologConsulting", q, i);
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query_key_s(culprit, "culprit", q, i);
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query_key_s(errorMsg, "errorMsg", q, i);
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query_key_i(errorMsgLen, "errorMsgLen", q, i);
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return TermNil;
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}
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static void print_key_b(const char *key, bool v) {
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const char *b = v ? "true" : "false";
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fprintf(stderr, "%s: %s\n", key, b);
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}
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static void print_key_i(const char *key, YAP_Int v) {
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fprintf(stderr, "%s: " Int_FORMAT "\n", key, v);
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}
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static void print_key_s(const char *key, const char *v) {
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fprintf(stderr, "%s: %s\n", key, v);
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}
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static void printErr(yap_error_descriptor_t *i) {
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if (i->errorNo == YAP_NO_ERROR) {
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return;
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}
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print_key_i("errorNo", i->errorNo);
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print_key_i("errorClass", i->errorClass);
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print_key_s("errorAsText", i->errorAsText);
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print_key_s("errorGoal", i->errorGoal);
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print_key_s("classAsText", i->classAsText);
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print_key_i("errorLineq", i->errorLine);
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print_key_s("errorFunction", i->errorFunction);
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print_key_s("errorFile", i->errorFile);
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print_key_i("prologPredLine", i->prologPredLine);
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print_key_i("prologPredFirstLine", i->prologPredFirstLine);
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print_key_i("prologPredLastLine", i->prologPredLastLine);
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print_key_s("prologPredName", i->prologPredName);
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print_key_i("prologPredArity", i->prologPredArity);
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print_key_s("prologPredModule", i->prologPredModule);
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print_key_s("prologPredFile", i->prologPredFile);
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print_key_i("prologParserPos", i->prologParserPos);
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print_key_i("prologParserLine", i->prologParserLine);
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print_key_i("prologParserFirstLine", i->prologParserFirstLine);
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print_key_i("prologParserLastLine", i->prologParserLastLine);
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print_key_s("prologParserText", i->prologParserText);
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print_key_s("prologParserFile", i->prologParserFile);
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print_key_b("prologConsulting", i->prologConsulting);
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print_key_s("culprit", i->culprit);
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if (i->errorMsgLen) {
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print_key_s("errorMsg", i->errorMsg);
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print_key_i("errorMsgLen", i->errorMsgLen);
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}
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}
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static YAP_Term add_key_b(const char *key, bool v, YAP_Term o0) {
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YAP_Term tkv[2];
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tkv[1] = v ? TermTrue : TermFalse;
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tkv[0] = MkStringTerm(key);
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Term node = Yap_MkApplTerm(FunctorEq, 2, tkv);
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return MkPairTerm(node, o0);
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}
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static YAP_Term add_key_i(const char *key, YAP_Int v, YAP_Term o0) {
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YAP_Term tkv[2];
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tkv[1] = MkIntegerTerm(v), tkv[0] = MkStringTerm(key);
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Term node = Yap_MkApplTerm(FunctorEq, 2, tkv);
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return MkPairTerm(node, o0);
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}
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static YAP_Term add_key_s(const char *key, const char *v, YAP_Term o0) {
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Term tkv[2];
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if (!v || v[0] == '\0')
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return o0;
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tkv[1] = MkStringTerm(v), tkv[0] = MkStringTerm(key);
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Term node = Yap_MkApplTerm(FunctorEq, 2, tkv);
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return MkPairTerm(node, o0);
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}
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static Term err2list(yap_error_descriptor_t *i) {
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Term o = TermNil;
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if (i->errorNo == YAP_NO_ERROR) {
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return o;
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}
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o = add_key_i("errorNo", i->errorNo, o);
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o = add_key_i("errorClass", i->errorClass, o);
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o = add_key_s("errorAsText", i->errorAsText, o);
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o = add_key_s("errorGoal", i->errorGoal, o);
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o = add_key_s("classAsText", i->classAsText, o);
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o = add_key_i("errorLineq", i->errorLine, o);
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o = add_key_s("errorFunction", i->errorFunction, o);
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o = add_key_s("errorFile", i->errorFile, o);
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o = add_key_i("prologPredLine", i->prologPredLine, o);
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o = add_key_i("prologPredFirstLine", i->prologPredFirstLine, o);
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o = add_key_i("prologPredLastLine", i->prologPredLastLine, o);
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o = add_key_s("prologPredName", i->prologPredName, o);
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o = add_key_i("prologPredArity", i->prologPredArity, o);
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o = add_key_s("prologPredModule", i->prologPredModule, o);
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o = add_key_s("prologPredFile", i->prologPredFile, o);
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o = add_key_i("prologParserPos", i->prologParserPos, o);
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o = add_key_i("prologParserLine", i->prologParserLine, o);
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o = add_key_i("prologParserFirstLine", i->prologParserFirstLine, o);
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o = add_key_i("prologParserLastLine", i->prologParserLastLine, o);
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o = add_key_s("prologParserText", i->prologParserText, o);
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o = add_key_s("prologParserFile", i->prologParserFile, o);
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o = add_key_b("prologConsulting", i->prologConsulting, o);
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o = add_key_s("culprit", i->culprit, o);
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if (i->errorMsgLen) {
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o = add_key_s("errorMsg", i->errorMsg, o);
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o = add_key_i("errorMsgLen", i->errorMsgLen, o);
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}
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return o;
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}
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bool Yap_Warning(const char *s, ...) {
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CACHE_REGS
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va_list ap;
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PredEntry *pred;
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bool rc;
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Term ts[2];
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const char *fmt;
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char tmpbuf[MAXPATHLEN];
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yap_error_number err;
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LOCAL_DoingUndefp = true;
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if (LOCAL_PrologMode & InErrorMode && (err = LOCAL_ActiveError->errorNo)) {
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fprintf(stderr, "%% Warning %s WITHIN ERROR %s %s\n", s,
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Yap_errorClassName(Yap_errorClass(err)), Yap_errorName(err));
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Yap_RestartYap(1);
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}
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LOCAL_PrologMode |= InErrorMode;
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pred = RepPredProp(PredPropByFunc(FunctorPrintMessage,
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PROLOG_MODULE)); // PROCEDURE_print_message2
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va_start(ap, s);
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fmt = va_arg(ap, char *);
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if (fmt != NULL) {
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#if HAVE_VSNPRINTF
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vsnprintf(tmpbuf, MAXPATHLEN - 1, fmt, ap);
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#else
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(void)vsprintf(tmpbuf, fmt, ap);
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#endif
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} else {
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return false;
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}
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va_end(ap);
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if (pred->OpcodeOfPred == UNDEF_OPCODE || pred->OpcodeOfPred == FAIL_OPCODE) {
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fprintf(stderr, "warning message: %s\n", tmpbuf);
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LOCAL_DoingUndefp = false;
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LOCAL_PrologMode &= ~InErrorMode;
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return false;
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}
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ts[1] = MkAtomTerm(AtomWarning);
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ts[0] = MkAtomTerm(Yap_LookupAtom(tmpbuf));
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rc = Yap_execute_pred(pred, ts, true PASS_REGS);
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LOCAL_PrologMode &= ~InErrorMode;
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return rc;
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}
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void Yap_InitError__(const char *file, const char *function, int lineno,
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yap_error_number e, Term t, ...) {
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CACHE_REGS
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va_list ap;
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va_start(ap, t);
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const char *fmt;
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char tmpbuf[MAXPATHLEN];
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fmt = va_arg(ap, char *);
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if (fmt != NULL) {
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#if HAVE_VSNPRINTF
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vsnprintf(tmpbuf, MAXPATHLEN - 1, fmt, ap);
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#else
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(void)vsprintf(tmpbuf, fmt, ap);
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#endif
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} else
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return;
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va_end(ap);
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if (LOCAL_ActiveError->errorNo != YAP_NO_ERROR) {
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yap_error_number err = LOCAL_ActiveError->errorNo;
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fprintf(stderr, "%% Warning %s WITHIN ERROR %s %s\n", Yap_errorName(e),
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Yap_errorClassName(Yap_errorClass(err)), Yap_errorName(err));
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return;
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}
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LOCAL_ActiveError->errorNo = e;
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LOCAL_ActiveError->errorFile = NULL;
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LOCAL_ActiveError->errorFunction = NULL;
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LOCAL_ActiveError->errorLine = 0;
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if (fmt) {
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LOCAL_Error_Size = strlen(tmpbuf);
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LOCAL_ActiveError->errorMsg = malloc(LOCAL_Error_Size + 1);
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strcpy(LOCAL_ActiveError->errorMsg, tmpbuf);
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} else {
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LOCAL_Error_Size = 0;
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}
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}
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bool Yap_PrintWarning(Term twarning) {
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CACHE_REGS
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PredEntry *pred = RepPredProp(PredPropByFunc(
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FunctorPrintMessage, PROLOG_MODULE)); // PROCEDURE_print_message2;
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Term cmod = (CurrentModule == PROLOG_MODULE ? TermProlog : CurrentModule);
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bool rc;
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Term ts[2], err;
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if (LOCAL_PrologMode & InErrorMode && LOCAL_ActiveError && (err = LOCAL_ActiveError->errorNo)) {
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fprintf(stderr, "%% Warning %s while processing error: %s %s\n",
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Yap_TermToBuffer(twarning, ENC_ISO_UTF8,Quote_illegal_f | Ignore_ops_f | Unfold_cyclics_f), Yap_errorClassName(Yap_errorClass(err)), Yap_errorName(err));
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return false;
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}
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LOCAL_PrologMode |= InErrorMode;
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LOCAL_DoingUndefp = true;
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if (pred->OpcodeOfPred == UNDEF_OPCODE || pred->OpcodeOfPred == FAIL_OPCODE) {
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fprintf(stderr, "warning message:\n");
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Yap_DebugPlWrite(twarning);
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fprintf(stderr, "\n");
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LOCAL_DoingUndefp = false;
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LOCAL_PrologMode &= ~InErrorMode;
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CurrentModule = cmod;
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return false;
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}
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ts[1] = twarning;
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ts[0] = MkAtomTerm(AtomWarning);
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rc = Yap_execute_pred(pred, ts, true PASS_REGS);
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LOCAL_within_print_message = false;
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LOCAL_PrologMode &= ~InErrorMode;
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return rc;
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}
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bool Yap_HandleError__(const char *file, const char *function, int lineno,
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const char *s, ...) {
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CACHE_REGS
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yap_error_number err = LOCAL_Error_TYPE;
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const char *serr;
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arity_t arity = 2;
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if (LOCAL_ErrorMessage) {
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serr = LOCAL_ErrorMessage;
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} else {
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serr = s;
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}
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if (P!= FAILCODE) {
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if (P->opc == Yap_opcode(_try_c) || P->opc == Yap_opcode(_try_userc) ||
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P->opc == Yap_opcode(_retry_c) || P->opc == Yap_opcode(_retry_userc)) {
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arity = P->y_u.OtapFs.p->ArityOfPE;
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} else {
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arity = PREVOP(P, Osbpp)->y_u.Osbpp.p->ArityOfPE;
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}
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}
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switch (err) {
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case RESOURCE_ERROR_STACK:
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if (!Yap_gc(arity, ENV, gc_P(P, CP))) {
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Yap_Error__(false, file, function, lineno, RESOURCE_ERROR_STACK, ARG1,
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serr);
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return false;
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}
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LOCAL_PrologMode = UserMode;
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return true;
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case RESOURCE_ERROR_AUXILIARY_STACK:
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if (LOCAL_MAX_SIZE < (char *)AuxSp - AuxBase) {
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LOCAL_MAX_SIZE += 1024;
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}
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if (!Yap_ExpandPreAllocCodeSpace(0, NULL, TRUE)) {
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/* crash in flames */
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Yap_Error__(false, file, function, lineno, RESOURCE_ERROR_AUXILIARY_STACK,
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ARG1, serr);
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return false;
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}
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LOCAL_PrologMode = UserMode;
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return true;
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case RESOURCE_ERROR_HEAP:
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if (!Yap_growheap(FALSE, 0, NULL)) {
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Yap_Error__(false, file, function, lineno, RESOURCE_ERROR_HEAP, ARG2,
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serr);
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return false;
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}
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default:
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if (LOCAL_PrologMode == UserMode)
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Yap_ThrowError__( file, function, lineno, err, LOCAL_RawTerm, serr);
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else
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LOCAL_PrologMode &= ~InErrorMode;
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return false;
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}
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}
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int Yap_SWIHandleError(const char *s, ...) {
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CACHE_REGS
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yap_error_number err = LOCAL_Error_TYPE;
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char *serr;
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if (LOCAL_ErrorMessage) {
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serr = LOCAL_ErrorMessage;
|
|
} else {
|
|
serr = (char *)s;
|
|
}
|
|
switch (err) {
|
|
case RESOURCE_ERROR_STACK:
|
|
if (!Yap_gc(2, ENV, gc_P(P, CP))) {
|
|
Yap_Error(RESOURCE_ERROR_STACK, TermNil, serr);
|
|
return (FALSE);
|
|
}
|
|
return TRUE;
|
|
case RESOURCE_ERROR_AUXILIARY_STACK:
|
|
if (LOCAL_MAX_SIZE < (char *)AuxSp - AuxBase) {
|
|
LOCAL_MAX_SIZE += 1024;
|
|
}
|
|
if (!Yap_ExpandPreAllocCodeSpace(0, NULL, TRUE)) {
|
|
/* crash in flames */
|
|
Yap_Error(RESOURCE_ERROR_AUXILIARY_STACK, ARG1, serr);
|
|
return FALSE;
|
|
}
|
|
return true;
|
|
case RESOURCE_ERROR_HEAP:
|
|
if (!Yap_growheap(false, 0, NULL)) {
|
|
Yap_Error(RESOURCE_ERROR_HEAP, ARG2, serr);
|
|
return false;
|
|
}
|
|
default:
|
|
Yap_Error(err, TermNil, serr);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void Yap_RestartYap(int flag) {
|
|
CACHE_REGS
|
|
#if PUSH_REGS
|
|
restore_absmi_regs(&Yap_standard_regs);
|
|
#endif
|
|
siglongjmp(*LOCAL_RestartEnv, flag);
|
|
}
|
|
|
|
static void error_exit_yap(int value) {
|
|
CACHE_REGS
|
|
if (!(LOCAL_PrologMode & BootMode)) {
|
|
|
|
#if DEBUG
|
|
#endif
|
|
}
|
|
fprintf(stderr, "\n Exiting ....\n");
|
|
#if HAVE_BACKTRACE
|
|
void *callstack[256];
|
|
int i;
|
|
int frames = backtrace(callstack, 256);
|
|
char **strs = backtrace_symbols(callstack, frames);
|
|
fprintf(stderr, "Execution stack:\n");
|
|
for (i = 0; i < frames; ++i) {
|
|
fprintf(stderr, " %s\n", strs[i]);
|
|
}
|
|
free(strs);
|
|
#endif
|
|
Yap_exit(value);
|
|
}
|
|
|
|
/* This needs to be a static because I can't trust the stack (WIN32), and
|
|
I can't trust the Yap stacks (error) */
|
|
#define YAP_BUF_SIZE 512
|
|
|
|
static char tmpbuf[YAP_BUF_SIZE];
|
|
|
|
// error classes: based on OSI errors.
|
|
//
|
|
// - The extra argument says whether there different instances
|
|
//
|
|
// - Events are treated within the same pipeline as errors.
|
|
//
|
|
|
|
#undef BEGIN_ERROR_CLASSES
|
|
#undef ECLASS
|
|
#undef END_ERROR_CLASSES
|
|
#undef BEGIN_ERRORS
|
|
#undef E0
|
|
#undef E
|
|
#undef E1
|
|
#undef E2
|
|
#undef END_ERRORS
|
|
|
|
#define BEGIN_ERROR_CLASSES() \
|
|
static Atom mkerrorct(yap_error_class_number c) { \
|
|
switch (c) {
|
|
|
|
#define ECLASS(CL, A, B) \
|
|
case CL: \
|
|
return Yap_LookupAtom(A);
|
|
|
|
#define END_ERROR_CLASSES() \
|
|
} \
|
|
return NULL; \
|
|
}
|
|
|
|
#define BEGIN_ERRORS() \
|
|
static Term mkerrort(yap_error_number e, Term culprit, Term info) { \
|
|
switch (e) {
|
|
|
|
#define E0(A, B) \
|
|
case A: { \
|
|
Term ft[2]; \
|
|
ft[0] = MkAtomTerm(mkerrorct(B)); \
|
|
ft[1] = info; \
|
|
return Yap_MkApplTerm(FunctorError, 2, ft); \
|
|
}
|
|
|
|
#define E(A, B, C) \
|
|
case A: { \
|
|
Term ft[2], nt[2]; \
|
|
nt[0] = MkAtomTerm(Yap_LookupAtom(C)); \
|
|
nt[1] = MkVarTerm(); \
|
|
Yap_unify(nt[1], culprit); \
|
|
ft[0] = Yap_MkApplTerm(Yap_MkFunctor(mkerrorct(B), 2), 2, nt); \
|
|
ft[1] = info; \
|
|
return Yap_MkApplTerm(FunctorError, 2, ft); \
|
|
}
|
|
|
|
#define E1(A, B, C) \
|
|
case A: { \
|
|
Term ft[2], nt[1]; \
|
|
nt[0] = MkVarTerm(); \
|
|
Yap_unify(nt[0], culprit); \
|
|
ft[0] = Yap_MkApplTerm(Yap_MkFunctor(Yap_LookupAtom(C), 1),1 , nt); \
|
|
ft[1] = info; \
|
|
return Yap_MkApplTerm(FunctorError, 2, ft); \
|
|
}
|
|
|
|
#define E2(A, B, C, D) \
|
|
case A: { \
|
|
Term ft[2], nt[3]; \
|
|
nt[0] = MkAtomTerm(Yap_LookupAtom(C)); \
|
|
nt[1] = MkAtomTerm(Yap_LookupAtom(D)); \
|
|
nt[2] = MkVarTerm(); \
|
|
Yap_unify(nt[2], culprit); \
|
|
ft[0] = Yap_MkApplTerm(Yap_MkFunctor(mkerrorct(B), 3), 3, nt); \
|
|
ft[1] = info; \
|
|
return Yap_MkApplTerm(FunctorError, 2, ft); \
|
|
}
|
|
|
|
#define END_ERRORS() \
|
|
} \
|
|
return TermNil; \
|
|
}
|
|
|
|
#include "YapErrors.h"
|
|
|
|
bool Yap_pushErrorContext(bool pass, yap_error_descriptor_t *new_error) {
|
|
memset(new_error, 0, sizeof(yap_error_descriptor_t));
|
|
new_error->top_error = LOCAL_ActiveError;
|
|
LOCAL_ActiveError = new_error;
|
|
return true;
|
|
}
|
|
|
|
/* static void */
|
|
/* reset_error_description(void) { */
|
|
/* yap_error_descriptor_t *bf = LOCAL_ActiveError->top_error; */
|
|
/* if (Yap_HasException()) */
|
|
/* memset(LOCAL_ActiveError, 0, sizeof(*LOCAL_ActiveError)); */
|
|
/* LOCAL_ActiveError->top_error = bf; */
|
|
|
|
/* } */
|
|
yap_error_descriptor_t *Yap_popErrorContext(bool mdnew, bool pass) {
|
|
yap_error_descriptor_t *e =LOCAL_ActiveError;
|
|
// last block
|
|
LOCAL_ActiveError = e->top_error;
|
|
if (e->errorNo) {
|
|
if (!LOCAL_ActiveError->errorNo && pass) {
|
|
memcpy(LOCAL_ActiveError, e, sizeof(*LOCAL_ActiveError));
|
|
} else {
|
|
return e;
|
|
}
|
|
} else {
|
|
if (e->errorNo)
|
|
return e;
|
|
}
|
|
return NULL;
|
|
}
|
|
/**
|
|
* Throw an error directly to the error handler
|
|
*
|
|
* @param file where
|
|
* @param function who
|
|
* @param lineno when
|
|
* @param type what, error code
|
|
* @param where how, user information
|
|
*/
|
|
void Yap_ThrowError__(const char *file, const char *function, int lineno,
|
|
yap_error_number type, Term where, ...) {
|
|
va_list ap;
|
|
char tmpbuf[MAXPATHLEN];
|
|
|
|
va_start(ap, where);
|
|
char *fmt = va_arg(ap, char *);
|
|
if (fmt != NULL) {
|
|
#if HAVE_VSNPRINTF
|
|
(void)vsnprintf(tmpbuf, MAXPATHLEN - 1, fmt, ap);
|
|
#else
|
|
(void)vsprintf(tnpbuf, fmt, ap);
|
|
#endif
|
|
// fprintf(stderr, "warning: ");
|
|
Yap_Error__(true, file, function, lineno, type, where, tmpbuf);
|
|
} else {
|
|
Yap_Error__(true, file, function, lineno, type, where);
|
|
}
|
|
if (LOCAL_RestartEnv && !LOCAL_delay) {
|
|
Yap_RestartYap(5);
|
|
}
|
|
Yap_exit(5);
|
|
}
|
|
|
|
/**
|
|
* complete delayed error.
|
|
*
|
|
*/
|
|
void Yap_ThrowExistingError(void) {
|
|
if (LOCAL_RestartEnv) {
|
|
Yap_RestartYap(5);
|
|
}
|
|
Yap_exit(5);
|
|
}
|
|
|
|
/**
|
|
* @brief Yap_Error
|
|
* This function handles errors in the C code. Check errors.yap for the
|
|
*corresponding Prolog code.
|
|
*
|
|
* @param file C source
|
|
* @param function C function
|
|
* @param lineno C exact line
|
|
* @param type the error ID (in YAP this is a single integer)
|
|
* @param where the culprit
|
|
* @return usually FAILCODE
|
|
*
|
|
* In a good day, the error handler's job is to generate a throw. This includes:
|
|
* - constructing an ISO style error term;
|
|
* - constructing a list with all available info on the bug
|
|
* - generating the throw
|
|
* - forcing backtracking in order to restart.
|
|
*
|
|
* In a bad day, it has to deal with OOM, abort, and errors within errorts.
|
|
*
|
|
*/
|
|
yamop *Yap_Error__(bool throw, const char *file, const char *function,
|
|
int lineno, yap_error_number type, Term where, ...) {
|
|
CACHE_REGS
|
|
va_list ap;
|
|
char *fmt;
|
|
char s[MAXPATHLEN];
|
|
switch (type) {
|
|
case SYSTEM_ERROR_INTERNAL: {
|
|
fprintf(stderr, "%% Internal YAP Error: %s exiting....\n", tmpbuf);
|
|
// serious = true;
|
|
if (LOCAL_PrologMode & BootMode) {
|
|
fprintf(stderr, "%% YAP crashed while booting %s\n", tmpbuf);
|
|
} else {
|
|
Yap_detect_bug_location(P, FIND_PRED_FROM_ANYWHERE, YAP_BUF_SIZE);
|
|
if (tmpbuf[0]) {
|
|
fprintf(stderr, "%% Bug found while executing %s\n", tmpbuf);
|
|
}
|
|
#if HAVE_BACKTRACE
|
|
void *callstack[256];
|
|
int i;
|
|
int frames = backtrace(callstack, 256);
|
|
char **strs = backtrace_symbols(callstack, frames);
|
|
fprintf(stderr, "Execution stack:\n");
|
|
for (i = 0; i < frames; ++i) {
|
|
fprintf(stderr, " %s\n", strs[i]);
|
|
}
|
|
free(strs);
|
|
#endif
|
|
}
|
|
error_exit_yap(1);
|
|
}
|
|
case SYSTEM_ERROR_FATAL: {
|
|
fprintf(stderr, "%% Fatal YAP Error: %s exiting....\n", tmpbuf);
|
|
error_exit_yap(1);
|
|
}
|
|
case INTERRUPT_EVENT: {
|
|
error_exit_yap(1);
|
|
}
|
|
case ABORT_EVENT:
|
|
// fun = FunctorDollarVar;
|
|
// serious = true;
|
|
LOCAL_ActiveError->errorNo = ABORT_EVENT;
|
|
Yap_JumpToEnv();
|
|
P = FAILCODE;
|
|
LOCAL_PrologMode &= ~InErrorMode;
|
|
return P;
|
|
case CALL_COUNTER_UNDERFLOW_EVENT:
|
|
/* Do a long jump */
|
|
LOCAL_ReductionsCounterOn = FALSE;
|
|
LOCAL_PredEntriesCounterOn = FALSE;
|
|
LOCAL_RetriesCounterOn = FALSE;
|
|
LOCAL_ActiveError->errorNo = CALL_COUNTER_UNDERFLOW_EVENT;
|
|
Yap_JumpToEnv();
|
|
P = FAILCODE;
|
|
LOCAL_PrologMode &= ~InErrorMode;
|
|
return P;
|
|
case PRED_ENTRY_COUNTER_UNDERFLOW_EVENT:
|
|
/* Do a long jump */
|
|
LOCAL_ReductionsCounterOn = FALSE;
|
|
LOCAL_PredEntriesCounterOn = FALSE;
|
|
LOCAL_RetriesCounterOn = FALSE;
|
|
LOCAL_ActiveError->errorNo = PRED_ENTRY_COUNTER_UNDERFLOW_EVENT;
|
|
Yap_JumpToEnv();
|
|
P = FAILCODE;
|
|
LOCAL_PrologMode &= ~InErrorMode;
|
|
return P;
|
|
case RETRY_COUNTER_UNDERFLOW_EVENT:
|
|
/* Do a long jump */
|
|
LOCAL_ReductionsCounterOn = FALSE;
|
|
LOCAL_PredEntriesCounterOn = FALSE;
|
|
LOCAL_RetriesCounterOn = FALSE;
|
|
LOCAL_ActiveError->errorNo = RETRY_COUNTER_UNDERFLOW_EVENT;
|
|
Yap_JumpToEnv();
|
|
P = FAILCODE;
|
|
LOCAL_PrologMode &= ~InErrorMode;
|
|
return P;
|
|
default:
|
|
if (!Yap_pc_add_location(LOCAL_ActiveError, CP, B, ENV))
|
|
Yap_env_add_location(LOCAL_ActiveError, CP, B, ENV, 0);
|
|
break;
|
|
}
|
|
|
|
yap_error_number err = LOCAL_ActiveError->errorNo;
|
|
/* disallow recursive error handling */
|
|
if (LOCAL_PrologMode & InErrorMode && err) {
|
|
fprintf(stderr, "%% ERROR %s %s WITHIN ERROR %s %s\n",
|
|
Yap_errorClassName(Yap_errorClass(type)), Yap_errorName(type),
|
|
Yap_errorClassName(Yap_errorClass(err)), Yap_errorName(err));
|
|
return P;
|
|
}
|
|
if (LOCAL_PrologMode & BootMode || type == SYSTEM_ERROR_FATAL) {
|
|
/* crash in flames! */
|
|
fprintf(stderr,
|
|
"%s:%d:0 YAP Fatal Error %d in function %s:\n %s exiting....\n",
|
|
file, lineno, type, function, s);
|
|
error_exit_yap(1);
|
|
}
|
|
if (LOCAL_DoingUndefp && type == EVALUATION_ERROR_UNDEFINED) {
|
|
P = FAILCODE;
|
|
CalculateStackGap(PASS_REGS1);
|
|
return P;
|
|
}
|
|
if (where == 0L || where == TermNil||type==INSTANTIATION_ERROR) {
|
|
LOCAL_ActiveError->culprit = NULL;
|
|
} else {
|
|
LOCAL_ActiveError->culprit = Yap_TermToBuffer(
|
|
where, ENC_ISO_UTF8, Quote_illegal_f | Ignore_ops_f | Unfold_cyclics_f);
|
|
}
|
|
LOCAL_ActiveError->errorNo = type;
|
|
LOCAL_ActiveError->errorAsText = Yap_errorName(type);
|
|
LOCAL_ActiveError->errorClass = Yap_errorClass(type);
|
|
LOCAL_ActiveError->classAsText =
|
|
Yap_errorClassName(LOCAL_ActiveError->errorClass);
|
|
LOCAL_ActiveError->errorLine = lineno;
|
|
LOCAL_ActiveError->errorFunction = function;
|
|
LOCAL_ActiveError->errorFile = file;
|
|
Yap_prolog_add_culprit(LOCAL_ActiveError PASS_REGS1);
|
|
LOCAL_PrologMode |= InErrorMode;
|
|
Yap_ClearExs();
|
|
// first, obtain current location
|
|
// sprintf(LOCAL_FileNameBuf, "%s:%d in C-function %s ", file, lineno,
|
|
// function);
|
|
// tf = MkAtomTerm(Yap_LookupAtom(LOCAL_FileNameBuf));
|
|
#if DEBUG_STRICT
|
|
if (Yap_heap_regs && !(LOCAL_PrologMode & BootMode))
|
|
fprintf(stderr, "***** Processing Error %d (%lx,%x) %s***\n", type,
|
|
(unsigned long int)LOCAL_Signals, LOCAL_PrologMode, fmt);
|
|
else
|
|
fprintf(stderr, "***** Processing Error %d (%x) %s***\n", type,
|
|
LOCAL_PrologMode, fmt);
|
|
#endif
|
|
if (LOCAL_ActiveError->errorNo == SYNTAX_ERROR) {
|
|
LOCAL_ActiveError->errorClass = SYNTAX_ERROR_CLASS;
|
|
} else if (LOCAL_ActiveError->errorNo == SYNTAX_ERROR_NUMBER) {
|
|
LOCAL_ActiveError->errorClass = SYNTAX_ERROR_CLASS;
|
|
LOCAL_ActiveError->errorNo = SYNTAX_ERROR;
|
|
}
|
|
if (type == INTERRUPT_EVENT) {
|
|
fprintf(stderr, "%% YAP exiting: cannot handle signal %d\n",
|
|
(int)IntOfTerm(where));
|
|
Yap_exit(1);
|
|
}
|
|
va_start(ap, where);
|
|
fmt = va_arg(ap, char *);
|
|
if (fmt != NULL) {
|
|
#if HAVE_VSNPRINTF
|
|
(void)vsnprintf(s, MAXPATHLEN - 1, fmt, ap);
|
|
#else
|
|
(void)vsprintf(s, fmt, ap);
|
|
#endif
|
|
// fprintf(stderr, "warning: ");
|
|
if (s[0]) {
|
|
LOCAL_ActiveError->errorMsgLen = strlen(s) + 1;
|
|
LOCAL_ActiveError->errorMsg = malloc(LOCAL_ActiveError->errorMsgLen);
|
|
strcpy(LOCAL_ActiveError->errorMsg, s);
|
|
} else if (LOCAL_ErrorMessage && LOCAL_ErrorMessage[0]) {
|
|
LOCAL_ActiveError->errorMsgLen = strlen(LOCAL_ErrorMessage) + 1;
|
|
LOCAL_ActiveError->errorMsg = malloc(LOCAL_ActiveError->errorMsgLen);
|
|
strcpy(LOCAL_ActiveError->errorMsg, LOCAL_ErrorMessage);
|
|
} else {
|
|
LOCAL_ActiveError->errorMsgLen = 0;
|
|
LOCAL_ActiveError->errorMsg = 0;
|
|
}
|
|
}
|
|
va_end(ap);
|
|
if (where == 0 || where == TermNil) {
|
|
LOCAL_ActiveError->culprit = 0;
|
|
}
|
|
if (P == (yamop *)(FAILCODE)) {
|
|
LOCAL_PrologMode &= ~InErrorMode;
|
|
return P;
|
|
}
|
|
/* PURE_ABORT may not have set where correctly, BootMode may not have the data
|
|
* terms ready */
|
|
if (type == ABORT_EVENT || LOCAL_PrologMode & BootMode) {
|
|
LOCAL_PrologMode &= ~AbortMode;
|
|
LOCAL_PrologMode &= ~InErrorMode;
|
|
/* make sure failure will be seen at next port */
|
|
// no need to lock & unlock
|
|
if (LOCAL_PrologMode & AsyncIntMode)
|
|
Yap_signal(YAP_FAIL_SIGNAL);
|
|
P = FAILCODE;
|
|
} else {
|
|
/* Exit Abort Mode, if we were there */
|
|
LOCAL_PrologMode &= ~AbortMode;
|
|
LOCAL_PrologMode |= InErrorMode;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
// DumpActiveGoals( USES_REGS1 );
|
|
#endif /* DEBUG */
|
|
|
|
|
|
CalculateStackGap(PASS_REGS1);
|
|
#if DEBUG
|
|
// DumpActiveGoals( PASS_REGS1 );
|
|
#endif
|
|
/* wait if we we are in user code,
|
|
it's up to her to decide */
|
|
if (LOCAL_delay)
|
|
return P;
|
|
if (LOCAL_DoingUndefp) {
|
|
LOCAL_Signals = 0;
|
|
Yap_PrintWarning(MkErrorTerm(Yap_GetException()));
|
|
return P;
|
|
}
|
|
//LOCAL_ActiveError = Yap_GetException();
|
|
// reset_error_description();
|
|
if (!throw) {
|
|
Yap_JumpToEnv();
|
|
}
|
|
LOCAL_PrologMode = UserMode;
|
|
return P;
|
|
}
|
|
|
|
static Int close_error(USES_REGS1) {
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
return true;
|
|
}
|
|
|
|
#undef BEGIN_ERROR_CLASSES
|
|
#undef ECLASS
|
|
#undef END_ERROR_CLASSES
|
|
#undef BEGIN_ERRORS
|
|
#undef E0
|
|
#undef E
|
|
#undef E1
|
|
#undef E2
|
|
#undef END_ERRORS
|
|
|
|
#define BEGIN_ERROR_CLASSES() typedef enum aux_class {
|
|
|
|
#define ECLASS(CL, A, B) CL##__,
|
|
|
|
#define END_ERROR_CLASSES() \
|
|
} \
|
|
aux_class_t;
|
|
|
|
#define BEGIN_ERRORS()
|
|
#define E0(X, Y)
|
|
#define E(X, Y, Z)
|
|
#define E1(X, Y, Z)
|
|
#define E2(X, Y, Z, W)
|
|
#define END_ERRORS()
|
|
|
|
#include <YapErrors.h>
|
|
|
|
#undef BEGIN_ERROR_CLASSES
|
|
#undef ECLASS
|
|
#undef END_ERROR_CLASSES
|
|
#undef BEGIN_ERRORS
|
|
#undef E0
|
|
#undef E
|
|
#undef E1
|
|
#undef E2
|
|
#undef END_ERRORS
|
|
|
|
#define BEGIN_ERROR_CLASSES() static const char *c_error_class_name[] = {
|
|
|
|
#define ECLASS(CL, A, B) A,
|
|
|
|
#define END_ERROR_CLASSES() \
|
|
NULL \
|
|
}
|
|
|
|
typedef struct c_error_info {
|
|
int class;
|
|
const char *name;
|
|
} c_error_t;
|
|
|
|
#define BEGIN_ERRORS() static struct c_error_info c_error_list[] = {
|
|
#define E0(X, Y) {Y##__, ""},
|
|
#define E(X, Y, Z) {Y##__, Z},
|
|
#define E1(X, Y, Z) {Y##__, Z},
|
|
#define E2(X, Y, Z, W) {Y##__, Z " " W},
|
|
#define END_ERRORS() \
|
|
{ YAPC_NO_ERROR, "" } \
|
|
} \
|
|
;
|
|
|
|
#include <YapErrors.h>
|
|
|
|
yap_error_class_number Yap_errorClass(yap_error_number e) {
|
|
return c_error_list[e].class;
|
|
}
|
|
|
|
const char *Yap_errorName(yap_error_number e) { return c_error_list[e].name; }
|
|
|
|
const char *Yap_errorClassName(yap_error_class_number e) {
|
|
return c_error_class_name[e];
|
|
}
|
|
|
|
yap_error_descriptor_t *Yap_GetException(void) {
|
|
CACHE_REGS
|
|
if (LOCAL_ActiveError->errorNo != YAP_NO_ERROR) {
|
|
yap_error_descriptor_t *t = LOCAL_ActiveError,
|
|
*nt = malloc(sizeof(yap_error_descriptor_t));
|
|
memcpy(nt, t, sizeof(yap_error_descriptor_t));
|
|
return nt;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void Yap_PrintException(void) { printErr(LOCAL_ActiveError); }
|
|
|
|
bool Yap_RaiseException(void) {
|
|
if (LOCAL_ActiveError->errorNo == YAP_NO_ERROR)
|
|
return false;
|
|
return Yap_JumpToEnv();
|
|
}
|
|
|
|
bool Yap_ResetException(yap_error_descriptor_t *i) {
|
|
// reset error descriptor
|
|
if (!i)
|
|
return true;
|
|
yap_error_descriptor_t *bf = i->top_error;
|
|
memset(i, 0, sizeof(*i));
|
|
i->top_error = bf;
|
|
return true;
|
|
}
|
|
|
|
static Int reset_exception(USES_REGS1) { return Yap_ResetException(worker_id); }
|
|
|
|
Term MkErrorTerm(yap_error_descriptor_t *t) {
|
|
if (t->errorClass == EVENT)
|
|
return t->errorRawTerm;
|
|
return mkerrort(t->errorNo,
|
|
t->culprit?
|
|
Yap_BufferToTerm(t->culprit, TermNil): TermNil,
|
|
err2list(t));
|
|
}
|
|
|
|
static Int read_exception(USES_REGS1) {
|
|
yap_error_descriptor_t *t = AddressOfTerm(Deref(ARG1));
|
|
Term rc = MkErrorTerm(t);
|
|
// Yap_DebugPlWriteln(rc);
|
|
return Yap_unify(ARG2, rc);
|
|
}
|
|
|
|
static Int query_exception(USES_REGS1) {
|
|
const char *query;
|
|
Term t;
|
|
|
|
if (IsAtomTerm((t = Deref(ARG1))))
|
|
query = RepAtom(AtomOfTerm(t))->StrOfAE;
|
|
if (IsStringTerm(t))
|
|
query = StringOfTerm(t);
|
|
if (!IsAddressTerm(Deref(ARG2)))
|
|
return false;
|
|
yap_error_descriptor_t *y = AddressOfTerm(Deref(ARG2));
|
|
Term t3 = Deref(ARG3);
|
|
if (IsVarTerm(t3)) {
|
|
Term rc = queryErr(query, y);
|
|
// Yap_DebugPlWriteln(rc);
|
|
return Yap_unify(ARG3, rc);
|
|
} else {
|
|
return setErr(query, y, t3);
|
|
}
|
|
}
|
|
|
|
static Int drop_exception(USES_REGS1) {
|
|
yap_error_descriptor_t *t = AddressOfTerm(Deref(ARG1));
|
|
free(t);
|
|
return true;
|
|
}
|
|
|
|
static Int new_exception(USES_REGS1) {
|
|
Term t = MkSysError(malloc(sizeof(yap_error_descriptor_t)));
|
|
return Yap_unify(ARG1, t);
|
|
}
|
|
|
|
static Int committed_exception(USES_REGS1) {
|
|
Term t = MkSysError(LOCAL_CommittedError);
|
|
return Yap_unify(ARG1, t);
|
|
}
|
|
|
|
static Int get_exception(USES_REGS1) {
|
|
yap_error_descriptor_t *i;
|
|
Term t;
|
|
|
|
LOCAL_CommittedError = i = LOCAL_ActiveError;
|
|
if (i && i->errorNo != YAP_NO_ERROR) {
|
|
i = Yap_GetException();
|
|
Yap_ResetException(LOCAL_ActiveError);
|
|
LOCAL_PrologMode = UserMode;
|
|
if (i->errorRawTerm &&
|
|
(i->errorClass == EVENT || i->errorNo == SYNTAX_ERROR)) {
|
|
t = i->errorRawTerm;
|
|
} else if (i->culprit != NULL) {
|
|
t = mkerrort(i->errorNo, Yap_BufferToTerm(i->culprit,TermNil),
|
|
MkSysError(i));
|
|
} else {
|
|
t = mkerrort(i->errorNo, TermNil, MkSysError(i));
|
|
}
|
|
return Yap_unify(ARG1,t);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
yap_error_descriptor_t *event(Term t, yap_error_descriptor_t *i) {
|
|
i->errorNo = ERROR_EVENT;
|
|
i->errorClass = EVENT;
|
|
i->errorRawTerm = Yap_SaveTerm(t);
|
|
return i;
|
|
}
|
|
|
|
|
|
yap_error_descriptor_t *Yap_UserError(Term t, yap_error_descriptor_t *i) {
|
|
Term n = t;
|
|
bool found = false, wellformed = true;
|
|
if (!IsApplTerm(t) || FunctorOfTerm(t) != FunctorError) {
|
|
LOCAL_Error_TYPE = THROW_EVENT;
|
|
LOCAL_ActiveError->errorClass = EVENT;
|
|
LOCAL_ActiveError->errorAsText = Yap_errorName(THROW_EVENT);
|
|
LOCAL_ActiveError->classAsText = Yap_errorClassName(Yap_errorClass(THROW_EVENT));
|
|
LOCAL_ActiveError->errorRawTerm = Yap_SaveTerm(t);
|
|
LOCAL_ActiveError->culprit = NULL;
|
|
} else {
|
|
Term t1, t2;
|
|
t1 = ArgOfTerm(1, t);
|
|
t2 = ArgOfTerm(2, t);
|
|
// LOCAL_Error_TYPE = ERROR_EVENT;
|
|
wellformed = wellformed && ( i->errorAsText != NULL );
|
|
if (wellformed) {
|
|
int j;
|
|
for (j = 0; j < sizeof(c_error_list) / sizeof(struct c_error_info); j++) {
|
|
if (!strcmp(c_error_list[j].name, i->errorAsText) &&
|
|
(c_error_list[j].class == 0 ||
|
|
!strcmp(i->classAsText,
|
|
c_error_class_name[c_error_list[j].class]))) {
|
|
if (c_error_list[j].class != PERMISSION_ERROR ||
|
|
(t1 = ArgOfTerm(2, t1) && IsAtomTerm(t1) &&
|
|
!strcmp(c_error_list[j].name,
|
|
RepAtom(AtomOfTerm(t1))->StrOfAE) &&
|
|
c_error_list[j].class != EVENT)) {
|
|
i->errorNo = j;
|
|
i->errorClass = c_error_list[j].class;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} else if (IsAtomTerm(t1)) {
|
|
const char *err = RepAtom(AtomOfTerm(t1))->StrOfAE;
|
|
if (!strcmp(err, "instantiation_error")) {
|
|
i->errorClass = INSTANTIATION_ERROR_CLASS;
|
|
i->classAsText = "instantiation_error";
|
|
i->errorAsText = "instantiation_error";
|
|
i->errorNo = INSTANTIATION_ERROR;
|
|
found = true;
|
|
} else if (!strcmp(err, "uninstantiation_error")) {
|
|
i->errorClass = UNINSTANTIATION_ERROR_CLASS;
|
|
i->classAsText = "uninstantiation_error";
|
|
i->errorAsText = "uninstantiation_error";
|
|
i->errorNo = UNINSTANTIATION_ERROR;
|
|
found = true;
|
|
}
|
|
}
|
|
if (i->errorAsText && i->errorAsText[0]) {
|
|
char *errs = malloc(strlen(i->errorAsText) + 1);
|
|
strcpy(errs, i->errorAsText);
|
|
i->errorAsText = errs;
|
|
}
|
|
if (!found) {
|
|
return event(t, i);
|
|
}
|
|
if (found) {
|
|
n = t2;
|
|
}
|
|
i->errorGoal =
|
|
Yap_TermToBuffer(n, ENC_ISO_UTF8, Quote_illegal_f | Ignore_ops_f | Unfold_cyclics_f);
|
|
}
|
|
Yap_prolog_add_culprit(i PASS_REGS);
|
|
return i;
|
|
}
|
|
|
|
static Int is_boolean(USES_REGS1) {
|
|
Term t = Deref(ARG1);
|
|
// Term Context = Deref(ARG2)Yap_Error(INSTANTIATION_ERROR, t, NULL);;
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR, t, NULL);
|
|
return false;
|
|
}
|
|
return t == TermTrue || t == TermFalse;
|
|
}
|
|
|
|
static Int is_atom(USES_REGS1) {
|
|
Term t = Deref(ARG1);
|
|
// Term Context = Deref(ARG2)Yap_Error(INSTANTIATION_ERROR, t, NULL);;
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR, t, NULL);
|
|
return false;
|
|
}
|
|
return IsAtomTerm(t);
|
|
}
|
|
|
|
static Int is_callable(USES_REGS1) {
|
|
Term G = Deref(ARG1);
|
|
// Term Context = Deref(ARG2);
|
|
while (true) {
|
|
if (IsVarTerm(G)) {
|
|
Yap_Error(INSTANTIATION_ERROR, G, NULL);
|
|
return false;
|
|
}
|
|
if (IsApplTerm(G)) {
|
|
Functor f = FunctorOfTerm(G);
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, G, NULL);
|
|
}
|
|
if (f == FunctorModule) {
|
|
Term tm = ArgOfTerm(1, G);
|
|
if (IsVarTerm(tm)) {
|
|
Yap_Error(INSTANTIATION_ERROR, G, NULL);
|
|
return false;
|
|
}
|
|
if (!IsAtomTerm(tm)) {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, G, NULL);
|
|
return false;
|
|
}
|
|
G = ArgOfTerm(2, G);
|
|
} else {
|
|
return true;
|
|
}
|
|
} else if (IsPairTerm(G) || IsAtomTerm(G)) {
|
|
return true;
|
|
} else {
|
|
Yap_Error(TYPE_ERROR_CALLABLE, G, NULL);
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static Int is_predicate_indicator(USES_REGS1) {
|
|
Term G = Deref(ARG1);
|
|
// Term Context = Deref(ARG2);
|
|
Term mod = CurrentModule;
|
|
|
|
G = Yap_YapStripModule(G, &mod);
|
|
if (IsVarTerm(G)) {
|
|
Yap_Error(INSTANTIATION_ERROR, G, NULL);
|
|
return false;
|
|
}
|
|
if (!IsVarTerm(mod) && !IsAtomTerm(mod)) {
|
|
Yap_Error(TYPE_ERROR_ATOM, G, NULL);
|
|
return false;
|
|
}
|
|
if (IsApplTerm(G)) {
|
|
Functor f = FunctorOfTerm(G);
|
|
if (IsExtensionFunctor(f)) {
|
|
Yap_Error(TYPE_ERROR_PREDICATE_INDICATOR, G, NULL);
|
|
}
|
|
if (f == FunctorSlash || f == FunctorDoubleSlash) {
|
|
return true;
|
|
}
|
|
}
|
|
Yap_Error(TYPE_ERROR_PREDICATE_INDICATOR, G, NULL);
|
|
return false;
|
|
}
|
|
|
|
void Yap_InitErrorPreds(void) {
|
|
CACHE_REGS
|
|
Yap_InitCPred("$reset_exception", 1, reset_exception, 0);
|
|
Yap_InitCPred("$new_exception", 1, new_exception, 0);
|
|
Yap_InitCPred("$get_exception", 1, get_exception, 0);
|
|
Yap_InitCPred("$read_exception", 2, read_exception, 0);
|
|
Yap_InitCPred("$query_exception", 3, query_exception, 0);
|
|
Yap_InitCPred("$committed_exception", 1, committed_exception, 0);
|
|
Yap_InitCPred("$drop_exception", 1, drop_exception, 0);
|
|
Yap_InitCPred("$close_error", 0, close_error, HiddenPredFlag);
|
|
Yap_InitCPred("is_boolean", 2, is_boolean, TestPredFlag);
|
|
Yap_InitCPred("is_callable", 2, is_callable, TestPredFlag);
|
|
Yap_InitCPred("is_atom", 2, is_atom, TestPredFlag);
|
|
Yap_InitCPred("is_predicate_indicator", 2, is_predicate_indicator,
|
|
TestPredFlag);
|
|
}
|