510 lines
10 KiB
C
510 lines
10 KiB
C
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#include <stdlib.h>
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#include <stdio.h>
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#include "pl-incl.h"
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#if HAVE_ERRNO_H
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#include <errno.h>
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#endif
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void fatalError(const char *fm, ...) {exit(1);}
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int printMessage(atom_t severity, ...) {
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#if DEBUG
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fprintf(stderr,"calling printMessage: not implemented\n");
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#endif
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return 0;
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}
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/*******************************
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* ERROR-CHECKING *_get() *
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*******************************/
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int
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PL_get_nchars_ex(term_t t, size_t *len, char **s, unsigned int flags)
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{ return PL_get_nchars(t, len, s, flags|CVT_EXCEPTION);
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}
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int
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PL_get_chars_ex(term_t t, char **s, unsigned int flags)
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{ return PL_get_nchars(t, NULL, s, flags|CVT_EXCEPTION);
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}
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#undef PL_get_atom_ex
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int
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PL_get_atom_ex__LD(term_t t, atom_t *a ARG_LD)
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{ if ( PL_get_atom(t, a) )
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succeed;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_atom, t);
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}
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int
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PL_get_atom_ex(term_t t, atom_t *a)
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{ GET_LD
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if ( PL_get_atom(t, a) )
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succeed;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_atom, t);
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}
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int
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PL_get_integer_ex(term_t t, int *i)
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{ if ( PL_get_integer(t, i) )
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succeed;
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if ( PL_is_integer(t) )
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return PL_error(NULL, 0, NULL, ERR_REPRESENTATION, ATOM_int);
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_integer, t);
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}
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int
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PL_get_long_ex(term_t t, long *i)
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{ if ( PL_get_long(t, i) )
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succeed;
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if ( PL_is_integer(t) )
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return PL_error(NULL, 0, NULL, ERR_REPRESENTATION, ATOM_long);
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_integer, t);
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}
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int
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PL_get_int64_ex(term_t t, int64_t *i)
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{ if ( PL_get_int64(t, i) )
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succeed;
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if ( PL_is_integer(t) )
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return PL_error(NULL, 0, NULL, ERR_REPRESENTATION, ATOM_int64_t);
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_integer, t);
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}
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int
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PL_get_intptr_ex(term_t t, intptr_t *i)
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{
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#if SIZEOF_LONG != SIZEOF_VOIDP && SIZEOF_VOIDP == 8
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return PL_get_int64_ex(t, i);
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#else
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return PL_get_long_ex(t, (long*)i);
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#endif
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}
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int
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PL_get_bool_ex(term_t t, int *i)
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{ if ( PL_get_bool(t, i) )
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succeed;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_bool, t);
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}
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int
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PL_get_float_ex(term_t t, double *f)
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{ if ( PL_get_float(t, f) )
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succeed;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_float, t);
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}
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int
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PL_get_char_ex(term_t t, int *p, int eof)
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{ if ( PL_get_char(t, p, eof) )
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succeed;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_character, t);
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}
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int
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PL_unify_list_ex(term_t l, term_t h, term_t t)
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{ if ( PL_unify_list(l, h, t) )
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succeed;
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if ( PL_get_nil(l) )
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fail;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_list, l);
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}
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int
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PL_unify_nil_ex(term_t l)
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{ if ( PL_unify_nil(l) )
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succeed;
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if ( PL_is_list(l) )
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fail;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_list, l);
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}
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int
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PL_get_list_ex(term_t l, term_t h, term_t t)
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{ if ( PL_get_list(l, h, t) )
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succeed;
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if ( PL_get_nil(l) )
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fail;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_list, l);
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}
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int
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PL_get_nil_ex(term_t l)
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{ if ( PL_get_nil(l) )
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succeed;
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if ( PL_is_list(l) )
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fail;
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_list, l);
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}
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int
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PL_get_module_ex(term_t name, module_t *m)
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{ if ( !PL_get_module(name, m) )
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_atom, name);
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succeed;
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}
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int
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PL_unify_bool_ex(term_t t, bool val)
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{ GET_LD
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bool v;
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if ( PL_is_variable(t) )
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return PL_unify_atom(t, val ? ATOM_true : ATOM_false);
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if ( PL_get_bool(t, &v) )
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{ if ( (!val && !v) || (val && v) )
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succeed;
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fail;
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}
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return PL_error(NULL, 0, NULL, ERR_TYPE, ATOM_bool, t);
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}
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/*******************************
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* TYPICAL ERRORS *
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*******************************/
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int
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PL_instantiation_error(term_t actual)
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{ return PL_error(NULL, 0, NULL, ERR_INSTANTIATION);
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}
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int
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PL_representation_error(const char *resource)
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{ atom_t r = PL_new_atom(resource);
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int rc = PL_error(NULL, 0, NULL, ERR_RESOURCE, r);
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PL_unregister_atom(r);
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return rc;
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}
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int
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PL_type_error(const char *expected, term_t actual)
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{ return PL_error(NULL, 0, NULL, ERR_CHARS_TYPE, expected, actual);
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}
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int
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PL_domain_error(const char *expected, term_t actual)
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{ atom_t a = PL_new_atom(expected);
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int rc = PL_error(NULL, 0, NULL, ERR_DOMAIN, a, actual);
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PL_unregister_atom(a);
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return rc;
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}
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int
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PL_existence_error(const char *type, term_t actual)
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{ atom_t a = PL_new_atom(type);
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int rc = PL_error(NULL, 0, NULL, ERR_EXISTENCE, a, actual);
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PL_unregister_atom(a);
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return rc;
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}
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int
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PL_permission_error(const char *op, const char *type, term_t obj)
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{ atom_t t = PL_new_atom(type);
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atom_t o = PL_new_atom(op);
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int rc = PL_error(NULL, 0, NULL, ERR_PERMISSION, o, t, obj);
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PL_unregister_atom(t);
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PL_unregister_atom(o);
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return rc;
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}
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int
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PL_resource_error(const char *resource)
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{ atom_t r = PL_new_atom(resource);
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int rc = PL_error(NULL, 0, NULL, ERR_RESOURCE, r);
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PL_unregister_atom(r);
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return rc;
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}
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word
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notImplemented(char *name, int arity)
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{ return (word)PL_error(NULL, 0, NULL, ERR_NOT_IMPLEMENTED_PROC, name, arity);
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}
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X_API int PL_error(const char *pred, int arity, const char *msg, int id, ...)
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{
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GET_LD
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term_t formal, swi, predterm, msgterm, except;
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va_list args;
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formal = PL_new_term_ref();
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swi = PL_new_term_ref();
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predterm = PL_new_term_ref();
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msgterm = PL_new_term_ref();
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except = PL_new_term_ref();
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if ( msg == ((char *)(-1)) )
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{ if ( errno == EPLEXCEPTION )
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return FALSE;
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msg = OsError();
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}
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/* This would really require having pl-error.c, but we'll make do so as */
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va_start(args, id);
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switch(id) {
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case ERR_INSTANTIATION:
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err_instantiation:
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PL_unify_atom(formal, ATOM_instantiation_error);
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break;
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case ERR_TYPE: /* ERR_INSTANTIATION if var(actual) */
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{ atom_t expected = va_arg(args, atom_t);
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term_t actual = va_arg(args, term_t);
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if ( PL_is_variable(actual) && expected != ATOM_variable )
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goto err_instantiation;
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_type_error2,
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PL_ATOM, expected,
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PL_TERM, actual);
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break;
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}
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case ERR_DOMAIN: /* ERR_INSTANTIATION if var(arg) */
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{ atom_t domain = va_arg(args, atom_t);
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term_t arg = va_arg(args, term_t);
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if ( PL_is_variable(arg) )
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goto err_instantiation;
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_domain_error2,
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PL_ATOM, domain,
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PL_TERM, arg);
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break;
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}
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case ERR_REPRESENTATION:
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{ atom_t what = va_arg(args, atom_t);
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_representation_error1,
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PL_ATOM, what);
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break;
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}
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case ERR_NOT_IMPLEMENTED_PROC:
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{ const char *name = va_arg(args, const char *);
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int arity = va_arg(args, int);
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_not_implemented2,
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PL_ATOM, ATOM_procedure,
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PL_FUNCTOR, FUNCTOR_divide2,
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PL_CHARS, name,
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PL_INT, arity);
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break;
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}
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case ERR_EXISTENCE:
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{ atom_t type = va_arg(args, atom_t);
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term_t obj = va_arg(args, term_t);
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_existence_error2,
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PL_ATOM, type,
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PL_TERM, obj);
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break;
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}
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case ERR_PERMISSION:
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{ atom_t type = va_arg(args, atom_t);
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atom_t op = va_arg(args, atom_t);
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term_t obj = va_arg(args, term_t);
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_permission_error3,
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PL_ATOM, type,
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PL_ATOM, op,
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PL_TERM, obj);
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break;
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}
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case ERR_SYSCALL:
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{ const char *op = va_arg(args, const char *);
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if ( !msg )
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msg = op;
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switch(errno)
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{ case ENOMEM:
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_resource_error1,
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PL_ATOM, ATOM_no_memory);
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break;
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default:
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PL_unify_atom(formal, ATOM_system_error);
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break;
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}
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break;
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}
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case ERR_TIMEOUT:
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{ atom_t op = va_arg(args, atom_t);
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term_t obj = va_arg(args, term_t);
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_timeout_error2,
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PL_ATOM, op,
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PL_TERM, obj);
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break;
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}
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case ERR_FILE_OPERATION:
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{ atom_t action = va_arg(args, atom_t);
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atom_t type = va_arg(args, atom_t);
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term_t file = va_arg(args, term_t);
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switch(errno)
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{ case EACCES:
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_permission_error3,
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PL_ATOM, action,
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PL_ATOM, type,
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PL_TERM, file);
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break;
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case EMFILE:
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case ENFILE:
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_resource_error1,
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PL_ATOM, ATOM_max_files);
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break;
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#ifdef EPIPE
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case EPIPE:
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if ( !msg )
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msg = "Broken pipe";
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/*FALLTHROUGH*/
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#endif
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default: /* what about the other cases? */
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_existence_error2,
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PL_ATOM, type,
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PL_TERM, file);
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break;
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}
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break;
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}
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case ERR_NOMEM:
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{ PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_resource_error1,
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PL_ATOM, ATOM_no_memory);
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break;
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}
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case ERR_EVALUATION:
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{ atom_t what = va_arg(args, atom_t);
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PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_evaluation_error1,
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PL_ATOM, what);
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break;
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}
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case ERR_STREAM_OP:
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{ atom_t action = va_arg(args, atom_t);
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term_t stream = va_arg(args, term_t);
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int rc;
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rc = PL_unify_term(formal,
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PL_FUNCTOR, FUNCTOR_io_error2,
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PL_ATOM, action,
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PL_TERM, stream);
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break;
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}
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case ERR_FORMAT:
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{ const char *s = va_arg(args, const char*);
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int rc;
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rc = PL_unify_term(formal,
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PL_FUNCTOR_CHARS, "format", 1,
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PL_CHARS, s);
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break;
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}
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case ERR_FORMAT_ARG:
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{ const char *s = va_arg(args, const char*);
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term_t arg = va_arg(args, term_t);
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int rc;
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rc = PL_unify_term(formal,
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PL_FUNCTOR_CHARS, "format_argument_type", 2,
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PL_CHARS, s,
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PL_TERM, arg);
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break;
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}
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default:
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fprintf(stderr, "unimplemented SWI error %d\n",id);
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goto err_instantiation;
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}
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va_end(args);
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if (!pred) {
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pred = Yap_GetCurrentPredName();
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arity = Yap_GetCurrentPredArity();
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}
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if ( pred )
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{ PL_unify_term(predterm,
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PL_FUNCTOR, FUNCTOR_divide2,
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PL_CHARS, pred,
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PL_INT, arity);
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}
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if ( msg )
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{
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PL_put_atom_chars(msgterm, msg);
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}
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PL_unify_term(swi,
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PL_FUNCTOR, FUNCTOR_context2,
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PL_TERM, predterm,
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PL_TERM, msgterm);
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PL_unify_term(except,
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PL_FUNCTOR, FUNCTOR_error2,
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PL_TERM, formal,
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PL_TERM, swi);
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return PL_raise_exception(except);
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}
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