1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/test/rbshell/sym.c	Mon Apr 16 00:26:38 2012 +0300
     1.3 @@ -0,0 +1,73 @@
     1.4 +#include <stdio.h>
     1.5 +#include <stdlib.h>
     1.6 +#include <string.h>
     1.7 +#include "sym.h"
     1.8 +#include "rbtree.h"
     1.9 +
    1.10 +struct symbol {
    1.11 +	char *name;
    1.12 +	int id, arity;
    1.13 +};
    1.14 +
    1.15 +static void del_func(struct rbnode *node, void *cls);
    1.16 +
    1.17 +struct rbtree *symbols;
    1.18 +
    1.19 +int init_sym(void)
    1.20 +{
    1.21 +	if(!(symbols = rb_create(RB_KEY_STRING))) {
    1.22 +		fprintf(stderr, "failed to create symbol table\n");
    1.23 +		return -1;
    1.24 +	}
    1.25 +	rb_set_delete_func(symbols, del_func, 0);
    1.26 +	return 0;
    1.27 +}
    1.28 +
    1.29 +void destroy_sym(void)
    1.30 +{
    1.31 +	rb_free(symbols);
    1.32 +}
    1.33 +
    1.34 +int add_sym(const char *name, int id, int arity)
    1.35 +{
    1.36 +	struct symbol *sym;
    1.37 +
    1.38 +	if(!(sym = malloc(sizeof *sym)) || !(sym->name = malloc(strlen(name) + 1))) {
    1.39 +		perror("failed to allocate symbol");
    1.40 +		free(sym);
    1.41 +		return -1;
    1.42 +	}
    1.43 +	strcpy(sym->name, name);
    1.44 +	sym->id = id;
    1.45 +	sym->arity = arity;
    1.46 +
    1.47 +	return rb_insert(symbols, sym->name, sym);
    1.48 +}
    1.49 +
    1.50 +int sym_lookup(const char *str)
    1.51 +{
    1.52 +	struct rbnode *node;
    1.53 +
    1.54 +	if(!(node = rb_find(symbols, (char*)str))) {
    1.55 +		fprintf(stderr, "undefined symbol: %s\n", str);
    1.56 +		return -1;
    1.57 +	}
    1.58 +	return ((struct symbol*)node->data)->id;
    1.59 +}
    1.60 +
    1.61 +int sym_arity(const char *str)
    1.62 +{
    1.63 +	struct rbnode *node;
    1.64 +
    1.65 +	if(!(node = rb_find(symbols, (char*)str))) {
    1.66 +		fprintf(stderr, "undefined symbol: %s\n", str);
    1.67 +		return -1;
    1.68 +	}
    1.69 +	return ((struct symbol*)node->data)->arity;
    1.70 +}
    1.71 +
    1.72 +static void del_func(struct rbnode *node, void *cls)
    1.73 +{
    1.74 +	free(((struct symbol*)node->data)->name);
    1.75 +	free(node->data);
    1.76 +}