Added gfcc2c to GF repo.

lib/c/gfcc-term.c

@@ -0,0 +1,203 @@
+#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);
+	}
+}