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como_compiler.c
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como_compiler.c
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/*
* Copyright (c) 2016 Ryan McCullagh <[email protected]>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <object.h>
#include <assert.h>
#define COMO_COMPILER 1
#include "como_ast.h"
#include "como_stack.h"
#include "como_debug.h"
#include "como_opcode.h"
#include "como_globals.h"
#include "como_parser.h"
#include "como_lexer.h"
#include "como_compiler.h"
#include "como_io.h"
#include "como_object.h"
static ComoFrame *global_frame = NULL;
static void call_stack_push(como_stack **stack, Object *name, Object *lineno)
{
Object *call_site_tuple = newArray(2);
arrayPushEx(call_site_tuple, name);
arrayPushEx(call_site_tuple, lineno);
como_stack_push(stack, call_site_tuple);
}
void como_print_stack_trace(ComoFrame *frame)
{
como_printf("stack trace for frame: \":S\" (last called, first)\n", frame->name);
while(frame != NULL) {
como_printf(" at :S (:S::L)\n", frame->name, frame->filename, frame->lineno);
frame = frame->next;
}
}
static void _como_asm_dump(FILE *fp, ComoFrame *frame);
static void
como_op_code_array_push(ComoFrame *frame, unsigned char op_code, Object *arg1) {
ComoOpCode *op = malloc( sizeof( ComoOpCode ) );
op->op_code = op_code;
op->operand = arg1;
arrayPushEx( frame->code, newPointer( (void *) op) );
}
#define como_op_code_get(frame, index) \
(ComoOpCode *)O_PTVAL(O_AVAL((frame)->code)->table[(index)]);
static void push(ComoFrame *frame, Object *value)
{
if(frame->cf_sp >= COMO_DEFAULT_FRAME_STACKSIZE)
{
como_error_noreturn(frame, "error stack overflow tried to push onto #%zu",
frame->cf_sp);
}
else
{
frame->cf_stack[frame->cf_sp++] = value;
frame->cf_stack_size++;
}
}
static Object *pop(ComoFrame *frame)
{
Object *retval = NULL;
if(frame->cf_sp == 0)
{
como_error_noreturn(frame, "stack underflow, tried to go before 0");
}
else
{
retval = frame->cf_stack[--frame->cf_sp];
--frame->cf_stack_size;
}
return retval;
}
static ComoOpCode *create_op(unsigned char op, Object *oper)
{
ComoOpCode *ret = malloc(sizeof(ComoOpCode));
ret->op_code = op;
ret->flags = 0;
if(oper != NULL) {
ret->flags |= COMO_OP_CODE_OPERAND_USED;
}
ret->operand = oper;
return ret;
}
static ComoFrame *create_frame(Object *code, const char *name)
{
size_t i;
ComoFrame *frame = malloc(sizeof(ComoFrame));
frame->cf_sp = 0;
frame->cf_stack_size = 0;
for(i = 0; i < (size_t)COMO_DEFAULT_FRAME_STACKSIZE; i++) {
frame->cf_stack[i] = NULL;
}
frame->cf_symtab = newMap(4);
frame->code = code;
frame->pc = 0;
frame->next = NULL;
frame->namedparameters = newArray(2);
frame->filename = NULL;
frame->call_stack = NULL;
frame->name = newString(name);
frame->caller = NULL;
return frame;
}
static Object *como_proxy_not_null_check(Object *maybe)
{
if(maybe == NULL)
{
como_error_noreturn(NULL, "allocation of Object failed, exiting");
}
return maybe;
}
#define COMO_TRACE1(x) fprintf(stderr, "%s\n", #x)
#define COMO_TRACEVAR(x, fmt, ...) do { \
fprintf(stderr, "%s ", #x); \
fprintf(stderr, fmt, ##__VA_ARGS__); \
fprintf(stderr, "\n"); \
fflush(stderr); \
} while(0)
static void _como_asm_dump(FILE *fp, ComoFrame *frame)
{
(void)fp;
uint32_t x;
for(x = 0; x < O_MVAL(frame->cf_symtab)->capacity; x++) {
Bucket *bucket = O_MVAL(frame->cf_symtab)->buckets[x];
while(bucket != NULL) {
Object *value = bucket->value;
if(O_TYPE(value) == IS_POINTER) {
ComoFrame *fm = (ComoFrame *)O_PTVAL(value);
fprintf(stdout, "function %s() {\n", bucket->key->value);
_como_asm_dump(stdout, fm);
fprintf(stdout, "}\n");
}
bucket = bucket->next;
}
}
size_t i;
for(i = 0; i < O_AVAL(frame->code)->size; i++)
{
fprintf(stderr, "%zu\t", i);
ComoOpCode *opcode = como_op_code_get(frame, i);
switch(opcode->op_code)
{
default:
{
como_error_noreturn(NULL, "Invalid OpCode got %d", opcode->op_code);
}
case GET_FIELD:
{
COMO_TRACE1(GET_FIELD);
break;
}
case CREATE_ARRAY:
{
COMO_TRACE1(CREATE_ARRAY);
break;
}
case IAND:
{
COMO_TRACE1(IAND);
break;
}
case IASSERT:
{
COMO_TRACE1(IASSERT);
break;
}
case UNARY_NOT:
{
COMO_TRACE1(UNARY_NOT);
break;
}
case ITYPEOF:
{
COMO_TRACE1(ITYPEOF);
break;
}
case POSTFIX_INC:
{
COMO_TRACEVAR(POSTFIX_INC, "%s", O_SVAL(opcode->operand)->value);
break;
}
case POSTFIX_DEC: {
COMO_TRACEVAR(POSTFIX_DEC, "%s", O_SVAL(opcode->operand)->value);
break;
}
case IS_LESS_THAN: {
COMO_TRACE1(IS_LESS_THAN);
break;
}
case IADD: {
COMO_TRACE1(IADD);
break;
}
case IMINUS: {
COMO_TRACE1(IMINUS);
break;
}
case IREM: {
COMO_TRACE1(IREM);
break;
}
case IS_GREATER_THAN_OR_EQUAL:
{
COMO_TRACE1(IS_GREATER_THAN_OR_EQUAL);
break;
}
case IS_LESS_THAN_OR_EQUAL:
{
COMO_TRACE1(IS_LESS_THAN_OR_EQUAL);
break;
}
case JZ:
{
COMO_TRACEVAR(JZ, "%ld", O_LVAL(opcode->operand));
break;
}
case JMP:
{
COMO_TRACEVAR(JMP, "%ld", O_LVAL(opcode->operand));
break;
}
case LABEL:
{
COMO_TRACE1(LABEL);
break;
}
case HALT:
{
COMO_TRACE1(HALT);
break;
}
case IS_NOT_EQUAL:
{
COMO_TRACE1(IS_NOT_EQUAL);
break;
}
case LOAD_CONST:
{
char *sval = objectToString(opcode->operand);
COMO_TRACEVAR(LOAD_CONST, "%s", sval);
free(sval);
break;
}
case STORE_NAME:
{
COMO_TRACEVAR(STORE_NAME, "%s", O_SVAL(opcode->operand)->value);
break;
}
/* This is where recursion was broken, don't do *ex */
case LOAD_NAME:
{
COMO_TRACEVAR(LOAD_NAME, "%s", O_SVAL(opcode->operand)->value);
break;
}
case CALL_FUNCTION: {
COMO_TRACE1(CALL_FUNCTION);
break;
}
case IS_EQUAL: {
COMO_TRACE1(IS_EQUAL);
break;
}
case ITIMES: {
COMO_TRACE1(ITIMES);
break;
}
case IRETURN: {
COMO_TRACEVAR(IRETURN, "%ld", O_LVAL(opcode->operand));
break;
}
case IPRINT: {
COMO_TRACE1(IPRINT);
break;
}
}
}
}
void como_compile(ast_node* p, ComoFrame *frame)
{
#define COMO_CHECKED(result) \
como_proxy_not_null_check((result))
assert(p);
switch(p->type)
{
default:
como_error_noreturn(NULL, "Invalid node type(%d)", p->type);
break;
case AST_NODE_TYPE_SLOT_ACCESS:
como_compile(p->u1.slot_access_node.value, frame);
como_compile(p->u1.slot_access_node.index, frame);
como_op_code_array_push(frame, GET_FIELD, NULL);
break;
case AST_NODE_TYPE_ARRAY:
{
ssize_t element_count = p->u1.array_node.elements->u1.statements_node.count;
while(element_count--) {
como_compile(p->u1.array_node.elements->u1.statements_node.statement_list[(size_t)element_count], frame);
}
/* Last value on stack has the array length */
como_op_code_array_push(frame, LOAD_CONST,
newLong((long)(p->u1.array_node.elements->u1.statements_node.count)));
como_op_code_array_push(frame, CREATE_ARRAY, NULL);
break;
}
case AST_NODE_TYPE_ASSERT:
como_compile(p->u1.assert_node.expr, frame);
como_op_code_array_push(frame, LOAD_CONST,
COMO_CHECKED(newLong((long)p->u1.assert_node.lineno)));
como_op_code_array_push(frame, IASSERT, NULL);
break;
case AST_NODE_TYPE_TYPEOF:
como_compile(p->u1.typeof_node.expr, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(ITYPEOF, NULL)));
break;
case AST_NODE_TYPE_STRING:
arrayPushEx(frame->code, newPointer((void *)create_op(LOAD_CONST,
newString(p->u1.string_value.value))));
break;
case AST_NODE_TYPE_PRINT:
como_compile(p->u1.print_node.expr, frame);
arrayPushEx(frame->code,
newPointer((void *)create_op(IPRINT, NULL)));
break;
case AST_NODE_TYPE_NUMBER:
arrayPushEx(frame->code, newPointer((void *)create_op(LOAD_CONST,
newLong((long)p->u1.number_value))));
break;
case AST_NODE_TYPE_ID:
arrayPushEx(frame->code, newPointer((void *)create_op(LOAD_NAME,
newString(p->u1.string_value.value))));
break;
case AST_NODE_TYPE_RET:
if(p->u1.return_node.expr != NULL)
{
como_compile(p->u1.return_node.expr, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(IRETURN,
newLong(1L))));
}
else
{
arrayPushEx(frame->code, newPointer((void *)create_op(IRETURN,
newLong(0L))));
}
break;
case AST_NODE_TYPE_STATEMENT_LIST:
{
size_t i;
for(i = 0; i < p->u1.statements_node.count; i++)
{
ast_node* stmt = p->u1.statements_node.statement_list[i];
como_compile(stmt, frame);
}
}
break;
case AST_NODE_TYPE_WHILE:
{
Object *l = newLong((long)(O_AVAL(frame->code)->size));
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL, l)));
Object *l2 = newLong(0);
como_compile(p->u1.while_node.condition, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(JZ, l2)));
como_compile(p->u1.while_node.body, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(JMP,
newLong(O_LVAL(l)))));
Object *l3 = newLong((long)(O_AVAL(frame->code)->size));
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL,
l3)));
O_LVAL(l2) = O_LVAL(l3);
}
break;
case AST_NODE_TYPE_FOR:
{
Object *l = newLong((long)(O_AVAL(frame->code)->size));
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL,
l)));
Object *l2 = newLong(0);
como_compile(p->u1.for_node.initialization, frame);
como_compile(p->u1.for_node.condition, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(JZ,
l2)));
Object *l4 = newLong((long)(O_AVAL(frame->code)->size));
/* label for the body */
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL,
l4)));
como_compile(p->u1.for_node.body, frame);
como_compile(p->u1.for_node.final_expression, frame);
como_compile(p->u1.for_node.condition, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(JZ,
l2)));
arrayPushEx(frame->code, newPointer((void *)create_op(JMP,
newLong(O_LVAL(l4)))));
Object *l3 = newLong((long)(O_AVAL(frame->code)->size));
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL,
l3)));
O_LVAL(l2) = O_LVAL(l3);
}
break;
case AST_NODE_TYPE_IF:
{
Object *l2 = newLong(0);
Object *l4 = newLong(0);
como_compile(p->u1.if_node.condition, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(JZ,
l2)));
como_compile(p->u1.if_node.b1, frame);
arrayPushEx(frame->code, newPointer((void *)create_op(JMP,
l4)));
Object *l3 = newLong((long)(O_AVAL(frame->code)->size));
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL,
l3)));
if(p->u1.if_node.b2 != NULL) {
como_compile(p->u1.if_node.b2, frame);
}
O_LVAL(l2) = O_LVAL(l3);
O_LVAL(l4) = (long)(O_AVAL(frame->code)->size);
arrayPushEx(frame->code, newPointer((void *)create_op(LABEL,
newLong((long)(O_AVAL(frame->code)->size)))));
}
break;
case AST_NODE_TYPE_FUNC_DECL:
{
const char *name = p->u1.function_node.name;
Object *func_decl = newArray(4);
Object *func_decl_parameters = newArray(2);
ComoFrame *func_decl_frame = create_frame(func_decl, name);
func_decl_frame->lineno = newLong(0L);
func_decl_frame->namedparameters = func_decl_parameters;
if(frame->filename != NULL)
{
func_decl_frame->filename = copyObject(frame->filename);
}
else
{
func_decl_frame->filename = newString("<unknown>");
}
size_t i;
ast_node_statements *parameters = &p->u1.function_node
.parameter_list->u1
.statements_node;
for(i = 0; i < parameters->count; i++)
{
arrayPushEx(func_decl_parameters, newString(
AST_NODE_AS_ID(
parameters->statement_list[i]
)
)
);
}
arrayPushEx(func_decl_frame->code, newPointer((void *)create_op(
LOAD_CONST, newString(name))));
arrayPushEx(func_decl_frame->code, newPointer((void *)create_op(
STORE_NAME, newString("__FUNCTION__"))));
como_compile(p->u1.function_node.body, func_decl_frame);
Array *temp = O_AVAL(func_decl_frame->code);
Object *temp2 = temp->table[temp->size - 1];
ComoOpCode *opcode = (ComoOpCode *)(O_PTVAL(temp2));
if(opcode->op_code != IRETURN)
{
arrayPushEx(func_decl_frame->code, newPointer(
(void *)create_op(LOAD_CONST, newLong(0L))));
arrayPushEx(func_decl_frame->code, newPointer(
(void *)create_op(IRETURN, newLong(1L))));
}
/* All functions are inserted into the global frame, sigh */
mapInsert(frame->cf_symtab, name, newPointer(
(void *)func_decl_frame));
break;
}
case AST_NODE_TYPE_CALL:
{
const char *name = p->u1.call_node.id->u1.id_node.name;
const long argcount = (long)p->u1
.call_node
.arguments->u1
.statements_node
.count;
int lineno = p->u1.call_node.lineno;
int colno = p->u1.call_node.colno;
como_compile(p->u1.call_node.arguments, frame);
arrayPushEx(frame->code, newPointer(
(void *)create_op(LOAD_CONST, newLong(argcount))));
arrayPushEx(frame->code, newPointer(
(void *)create_op(LOAD_NAME, newString(name))));
arrayPushEx(frame->code, newPointer(
(void *)create_op(LOAD_CONST, newLong((long)lineno))));
arrayPushEx(frame->code, newPointer(
(void *)create_op(CALL_FUNCTION, newString(name))));
break;
}
case AST_NODE_TYPE_POSTFIX:
{
Object *name = newString(AST_NODE_AS_ID(p->u1.postfix_node.expr));
switch(p->u1.postfix_node.type)
{
case AST_POSTFIX_OP_INC:
arrayPushEx(frame->code, newPointer(
(void *)create_op(POSTFIX_INC, name)));
break;
case AST_POSTFIX_OP_DEC:
arrayPushEx(frame->code, newPointer(
(void *)create_op(POSTFIX_DEC, name)));
break;
}
break;
}
case AST_NODE_TYPE_UNARY_OP:
{
switch(p->u1.unary_node.type)
{
case AST_UNARY_OP_MINUS:
como_compile(p->u1.unary_node.expr, frame);
arrayPushEx(frame->code, newPointer(
(void *)create_op(UNARY_MINUS, NULL)));
break;
case AST_UNARY_NOT:
como_compile(p->u1.unary_node.expr, frame);
arrayPushEx(frame->code, newPointer(
(void *)create_op(UNARY_NOT, NULL)));
break;
}
}
break;
case AST_NODE_TYPE_BIN_OP:
{
if(p->u1.binary_node.type != AST_BINARY_OP_ASSIGN)
{
como_compile(p->u1.binary_node.left, frame);
como_compile(p->u1.binary_node.right, frame);
}
switch(p->u1.binary_node.type)
{
case AST_BINARY_OP_AND:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IAND, NULL)));
break;
case AST_BINARY_OP_REM:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IREM, NULL)));
break;
case AST_BINARY_OP_LTE:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IS_LESS_THAN_OR_EQUAL, NULL)));
break;
case AST_BINARY_OP_GTE:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IS_GREATER_THAN_OR_EQUAL, NULL)));
break;
case AST_BINARY_OP_LT:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IS_LESS_THAN, NULL)));
break;
case AST_BINARY_OP_GT:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IS_GREATER_THAN, NULL)));
break;
case AST_BINARY_OP_CMP:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IS_EQUAL, NULL)));
break;
case AST_BINARY_OP_NEQ:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IS_NOT_EQUAL, NULL)));
break;
case AST_BINARY_OP_MINUS:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IMINUS, NULL)));
break;
case AST_BINARY_OP_DIV:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IDIV, NULL)));
break;
case AST_BINARY_OP_ADD:
arrayPushEx(frame->code, newPointer(
(void *)create_op(IADD, NULL)));
break;
case AST_BINARY_OP_TIMES:
arrayPushEx(frame->code, newPointer(
(void *)create_op(ITIMES, NULL)));
break;
case AST_BINARY_OP_ASSIGN:
como_compile(p->u1.binary_node.right, frame);
arrayPushEx(frame->code, newPointer(
(void *)create_op(STORE_NAME, newString(
p->u1.binary_node.left->u1.id_node.name))));
break;
}
} break;
}
}
static Object *builtin_len(Object *args)
{
Object *value = O_AVAL(args)->table[ 0 ];
if(O_TYPE(value) == IS_ARRAY)
return newLong((long)O_AVAL(value)->size);
else if(O_TYPE(value) == IS_STRING)
return newLong((long)O_SVAL(value)->length);
else
return newLong(0L);
}
static Object *builtin_write(Object *args)
{
Object *arg = O_AVAL(args)->table[ 0 ];
if(O_TYPE(arg) == IS_STRING) {
int n = fputs(O_SVAL(arg)->value, stdout);
return newLong((long)n);
}
char *sval = objectToString(arg);
int n = fprintf(stdout, "%s", sval);
fflush(stdout);
free(sval);
return newLong((long)n);
}
static void como_execute(ComoFrame *frame, ComoFrame *callingframe)
{
size_t i;
for(i = 0; i < O_AVAL(frame->code)->size; i++)
{
ComoOpCode *opcode = como_op_code_get(frame, i);
switch(opcode->op_code)
{
default:
{
como_error_noreturn(NULL, "Invalid OpCode got %d", opcode->op_code);
}
case UNARY_MINUS:
{
Object *value = pop(frame);
if(O_TYPE(value) != IS_LONG) {
como_error_noreturn(frame, "UNARY_MINUS can only be used on ints");
}
push(frame, newLong(-O_LVAL(value)));
break;
}
case GET_FIELD:
{
Object *index = pop(frame);
Object *value = pop(frame);
if(O_TYPE(value) != IS_STRING && O_TYPE(value) != IS_ARRAY) {
como_error_noreturn(frame, "Can't get dimension value of non object\n");
}
if(O_TYPE(index) == IS_LONG) {
long lindex = O_LVAL(index);
if(O_TYPE(value) == IS_ARRAY) {
if(lindex >= 0 && lindex < (long)O_AVAL(value)->size) {
push(frame, O_AVAL(value)->table[lindex]);
} else {
push(frame, newNull());
}
} else {
if(lindex >= 0 && lindex < (long)O_SVAL(value)->length) {
char c[2];
c[0] = O_SVAL(value)->value[lindex];
c[1] = '\0';
push(frame, newString(c));
} else {
push(frame, newNull());
}
}
} else {
como_error_noreturn(frame,
"Only ints are acceptable as slot access values");
}
break;
}
case CREATE_ARRAY:
{
Object *olength = pop(frame);
size_t length = (size_t)O_LVAL(olength);
Object *array = newArray(length == 0 ? 2 : length);
size_t i;
for(i = 0; i < length; i++) {
Object *temp = pop(frame);
arrayPush(array, temp);
}
push(frame, array);
break;
}
case IAND:
{
Object *obj1 = pop(frame);
Object *obj2 = pop(frame);
if(como_object_is_truthy(obj1) && como_object_is_truthy(obj2))
{
push(frame, newLong(1L));
}
else
{
push(frame, newLong(0L));
}
break;
}
case IASSERT:
{
Object *lineno = pop(frame);
Object *obj = pop(frame);
if(!como_object_is_truthy(obj)) {
como_error_noreturn(frame, "como: assertion failed on line %d\n", O_LVAL(lineno));
}
break;
}
case UNARY_NOT:
{
Object *obj = pop(frame);
if(como_object_is_truthy(obj))
{
push(frame, newLong(0L));
}
else
{
push(frame, newLong(1L));
}
break;
}
case ITYPEOF:
{
Object *obj = pop(frame);
/* Hack */
if(O_TYPE(obj) == IS_POINTER)
{
push(frame, newString("function"));
}
else if(O_TYPE(obj) == IS_NULL)
{
push(frame, newString("undefined"));
}
else
{
char *str = objectTypeStr(obj);
push(frame, newString(str));
free(str);
}
break;
}
case POSTFIX_INC:
{
Object *value = NULL;
value = mapSearchEx(frame->cf_symtab,
O_SVAL(opcode->operand)->value);
if(value == NULL)
{
como_error_noreturn(frame, "undefined variable '%s'",
O_SVAL(opcode->operand)->value);
}
else
{
if(O_TYPE(value) != IS_LONG)
{
como_error_noreturn(frame, "unsupported value for POSTFIX_INC");
}
else
{
long oldvalue = O_LVAL(value);
O_LVAL(value) = oldvalue + 1;
push(frame, newLong(oldvalue));
}
}
break;
}
case POSTFIX_DEC: {
Object *value = NULL;
value = mapSearchEx(frame->cf_symtab,
O_SVAL(opcode->operand)->value);
if(value == NULL) {
como_error_noreturn(frame, "undefined variable '%s'",
O_SVAL(opcode->operand)->value);
} else {
if(O_TYPE(value) != IS_LONG) {
como_error_noreturn(frame, "unsupported value for POSTFIX_DEC");
} else {
long oldvalue = O_LVAL(value);
O_LVAL(value) = oldvalue - 1;
push(frame, newLong(oldvalue));
}
}
break;
}
case IS_LESS_THAN: {
Object *right = pop(frame);
Object *left = pop(frame);
assert(right);
assert(left);
if(objectValueIsLessThan(left, right)) {
push(frame, newLong(1L));
} else {
push(frame, newLong(0L));
}
break;
}
case IADD: {
Object *right = pop(frame);
Object *left = pop(frame);
assert(right);
assert(left);
if(O_TYPE(left) == IS_LONG && O_TYPE(right) == IS_LONG) {
long value = O_LVAL(left) + O_LVAL(right);
push(frame, newLong(value));
} else {
char *left_str = objectToString(left);
char *right_str = objectToString(right);
Object *s1 = newString(left_str);
Object *s2 = newString(right_str);
Object *value = stringCat(s1, s2);
push(frame, value);
objectDestroy(s1);
objectDestroy(s2);
free(left_str);
free(right_str);
}
break;
}
case IMINUS: {
Object *right = pop(frame);
Object *left = pop(frame);
assert(right);
assert(left);
if(! (O_TYPE(left) == IS_LONG && O_TYPE(right) == IS_LONG)) {
como_error_noreturn(frame, "unsupported value for IMINUS");
} else {
push(frame, newLong(O_LVAL(left) - O_LVAL(right)));
}
break;
}
case IREM: {
Object *right = pop(frame);
Object *left = pop(frame);
assert(right);
assert(left);
if(O_TYPE(left) != IS_LONG && O_TYPE(right) != IS_LONG) {
como_error_noreturn(frame, "unsupported value for IREM");
} else {
push(frame, newLong(O_LVAL(left) % O_LVAL(right)));
}
break;
}
case IS_GREATER_THAN_OR_EQUAL:
{
Object *right = pop(frame);
Object *left = pop(frame);
if(objectValueIsGreaterThan(left, right)
|| objectValueCompare(left, right))
{
push(frame, newLong(1L));
}
else
{
push(frame, newLong(0L));
}
break;
}
case IS_LESS_THAN_OR_EQUAL:
{
Object *right = pop(frame);
Object *left = pop(frame);
assert(right);
assert(left);
if(objectValueCompare(left, right)
|| objectValueIsLessThan(left, right))
{
push(frame, newLong(1L));
}
else
{
push(frame, newLong(0L));
}
break;
}
case JZ:
{