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#include "code.h"
#include <string.h>
#include <time.h>
#include "mem.h"
expression* make_int_expression(int i) {
expression* result = my_calloc(1, sizeof(expression));
result->kind = EXPR_INT;
result->var1 = my_calloc(1, sizeof(int));
*((int*) result->var1) = i;
return result;
}
expression* make_name_expression(char* s) {
expression* result = my_calloc(1, sizeof(expression));
result->kind = EXPR_NAME;
result->var1 = my_calloc(1, strlen(s) + 1);
strcpy(result->var1, s);
return result;
}
expression* code_time(void) {
return make_int_expression((int) time(NULL));
}
expression* code_mul(expression* a, expression* b) {
return (a->kind != EXPR_INT || b->kind != EXPR_INT)
? make_name_expression("mul on non-ints")
: make_int_expression(*((int*) a->var1) * *((int*) b->var1));
}
expression* code_sub(expression* a, expression* b) {
return (a->kind != EXPR_INT || b->kind != EXPR_INT)
? make_name_expression("sub on non-ints")
: make_int_expression(*((int*) b->var1) - *((int*) a->var1));
}
unsigned char code_find(char* name, void** function) {
if (!strcmp(name, "mul")) {
*function = (void(*)(void)) code_mul;
return 2;
} else if (!strcmp(name, "sub")) {
*function = (void(*)(void)) code_sub;
return 2;
} else if (!strcmp(name, "time")) {
*function = (void(*)(void)) code_time;
return 0;
}
*function = NULL;
return 0;
}
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