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#include "gfcc-term.h"
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
static void *buffer = NULL;
static size_t current;
extern void term_alloc_pool(size_t size) {
if (buffer == NULL)
buffer = malloc(size);
current = 0;
}
extern void term_free_pool() {
if (buffer != NULL)
free(buffer);
buffer = NULL;
}
extern void *term_alloc(size_t size) {
void *off = buffer + current;
current += size;
return off;
}
static inline Term *create_term(TermType type, int n) {
Term *t = (Term*)term_alloc(sizeof(Term) + n * sizeof(Term *));
t->type = type;
t->value.size = n; /* FIXME: hack! */
return t;
}
extern Term *term_array(int n, ...) {
Term *t = create_term(TERM_ARRAY, n);
va_list ap;
int i;
va_start(ap, n);
for (i = 0; i < n; i++) {
term_set_child(t, i, va_arg(ap, Term *));
}
va_end(ap);
return t;
}
extern Term *term_seq(int n, ...) {
Term *t = create_term(TERM_SEQUENCE, n);
va_list ap;
int i;
va_start(ap, n);
for (i = 0; i < n; i++) {
term_set_child(t, i, va_arg(ap, Term *));
}
va_end(ap);
return t;
}
extern Term *term_variants(int n, ...) {
Term *t = create_term(TERM_VARIANTS, n);
va_list ap;
int i;
va_start(ap, n);
for (i = 0; i < n; i++) {
term_set_child(t, i, va_arg(ap, Term *));
}
va_end(ap);
return t;
}
extern Term *term_glue(int n, ...) {
Term *t = create_term(TERM_GLUE, n);
va_list ap;
int i;
va_start(ap, n);
for (i = 0; i < n; i++) {
term_set_child(t, i, va_arg(ap, Term *));
}
va_end(ap);
return t;
}
extern Term *term_rp(Term *t1, Term *t2) {
Term *t = create_term(TERM_RECORD_PARAM, 2);
term_set_child(t, 0, t1);
term_set_child(t, 1, t2);
return t;
}
extern Term *term_suffix(const char *pref, Term *suf) {
Term *t = create_term(TERM_SUFFIX_TABLE, 2);
term_set_child(t,0,term_str(pref));
term_set_child(t,1,suf);
return t;
}
extern Term *term_str(const char *s) {
Term *t = create_term(TERM_STRING, 0);
t->value.string_value = s;
return t;
}
extern Term *term_int(int i) {
Term *t = create_term(TERM_INTEGER,0);
t->value.integer_value = i;
return t;
}
extern Term *term_meta() {
return create_term(TERM_META, 0);
}
extern Term *term_sel_int(Term *t, int i) {
switch (t->type) {
case TERM_ARRAY:
return term_get_child(t,i);
case TERM_SUFFIX_TABLE:
return term_glue(2,
term_get_child(t,0),
term_sel_int(term_get_child(t,1),i));
case TERM_META:
return t;
default:
fprintf(stderr,"Error: term_sel_int %d %d\n", t->type, i);
exit(1);
return NULL;
}
}
extern Term *term_sel(Term *t1, Term *t2) {
switch (t2->type) {
case TERM_INTEGER:
return term_sel_int(t1, t2->value.integer_value);
case TERM_RECORD_PARAM:
return term_sel(t1,term_get_child(t2,0));
case TERM_META:
return term_sel_int(t1,0);
default:
fprintf(stderr,"Error: term_sel %d %d\n", t1->type, t2->type);
exit(1);
return 0;
}
}
static void term_print_sep(FILE *stream, Term *t, const char *sep) {
int n = t->value.size;
int i;
for (i = 0; i < n; i++) {
term_print(stream, term_get_child(t,i));
if (i < n-1) {
fputs(sep, stream);
}
}
}
extern void term_print(FILE *stream, Term *t) {
switch (t->type) {
case TERM_ARRAY:
term_print(stream, term_get_child(t,0));
break;
case TERM_SEQUENCE:
term_print_sep(stream, t, " ");
break;
case TERM_VARIANTS:
term_print_sep(stream, t, "/");
break;
case TERM_GLUE:
term_print_sep(stream, t, "");
break;
case TERM_RECORD_PARAM:
term_print(stream, term_get_child(t,0));
break;
case TERM_SUFFIX_TABLE:
term_print(stream, term_get_child(t,0));
term_print(stream, term_get_child(t,1));
break;
case TERM_META:
fputs("?", stream);
break;
case TERM_STRING:
fputs(t->value.string_value, stream);
break;
case TERM_INTEGER:
fprintf(stream, "%d", t->value.integer_value);
break;
default:
fprintf(stderr,"Error: term_print %d\n", t->type);
exit(1);
}
}
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