114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
#include "lisp.h"
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Node *lisp_function_addition(Nodes *args, Scopes *scopes) {
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UNUSED(scopes);
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if (args->count != 2) {
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printf("'+' expects two arguments!\n");
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return NULL;
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}
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if (args->items[0].kind != NODE_KIND_NUMBER ||
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args->items[1].kind != NODE_KIND_NUMBER) {
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printf("'+' can only add numbers, you specified something else!\n");
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return NULL;
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}
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Node *node = malloc(sizeof(Node));
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node->kind = NODE_KIND_NUMBER;
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intptr_t a = args->items[0].as_number;
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intptr_t b = args->items[1].as_number;
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node->as_number = a + b;
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return node;
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}
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Node *lisp_function_println(Nodes *args, Scopes *scopes) {
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if (args->count != 1) {
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printf("'+' expects one argument!\n");
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return NULL;
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}
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Node *result = eval(&args->items[0], scopes);
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node_print(*result);
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printf("\n");
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return result;
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}
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Node *lisp_function_list(Nodes *args, Scopes *scopes) {
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UNUSED(scopes);
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Node *node = malloc(sizeof(Node));
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node->kind = NODE_KIND_LIST;
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node->as_list = args;
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return node;
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}
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Node *lisp_function_append(Nodes *args, Scopes *scopes) {
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UNUSED(scopes);
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if (args->count != 2) {
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printf("'append' expects two arguments!\n");
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return NULL;
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}
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Node *node = malloc(sizeof(Node));
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node->kind = NODE_KIND_LIST;
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if (args->items[0].kind != NODE_KIND_LIST ||
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args->items[1].kind != NODE_KIND_LIST) {
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printf("'append' can only append two lists!\n");
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return NULL;
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}
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Nodes *nodes = malloc(sizeof(Nodes));
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Nodes *a = args->items[0].as_list;
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nob_da_append_many(nodes, a->items, a->count);
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Nodes *b = args->items[1].as_list;
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nob_da_append_many(nodes, b->items, b->count);
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node->as_list = nodes;
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return node;
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}
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Node *lisp_function_length(Nodes *args, Scopes *scopes) {
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UNUSED(scopes);
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if (args->count != 1) {
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printf("'length' expects one argument!\n");
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return NULL;
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}
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if (args->items[0].kind != NODE_KIND_LIST) {
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printf("'length' can only be used on lists!\n");
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return NULL;
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}
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Node *node = malloc(sizeof(Node));
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node->kind = NODE_KIND_NUMBER;
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node->as_number = args->items[0].as_list->count;
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return node;
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}
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Node *lisp_function_isnull(Nodes *args, Scopes *scopes) {
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UNUSED(scopes);
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if (args->count != 1) {
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printf("'null?' expects one argument!\n");
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return NULL;
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}
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if (args->items[0].kind != NODE_KIND_LIST) {
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printf("'null?' can only be used on lists!\n");
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return NULL;
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}
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Node *node = malloc(sizeof(Node));
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node->kind = NODE_KIND_NUMBER;
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node->as_number = args->items[0].as_list->count == 0 ? 1 : 0;
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return node;
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}
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