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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "compile.h"
#include "hashtable.h"
#include "parse.h"
int currentMangleId = 0;
int currentLitId = 0;
int includeStrlen = 0;
litData_t** literalData;
litData_t* init_str_data(char* value) {
litData_t* litData = malloc(sizeof(litData_t));
litData->litType = STRING;
char* vp = malloc((strlen(value) + 1) * sizeof(char));
strcpy(vp, value);
litData->data = vp;
litData->id = currentLitId;
return litData;
}
char* compile_to_asm(sym_t* symbol) {
literalData = malloc(sizeof(litData_t) * 100); //100 literals
char* header = ".global _start\n.text\n_start: ";
char* program = compile_to_asm_internal(symbol, currentMangleId);
char* dataH = ".data\n";
char* data = build_data();
char* footer = "mov $60, %rax\n"
"xorl %rdi, %rdi\n"
"syscall\n";
char* funcs = lib_funcs(); //build this last so it can consider contents of program
char* final = malloc(sizeof(char) * (strlen(header) + strlen(funcs) + strlen(program) + strlen(dataH) + strlen(data) + strlen(footer) + 1));
strcpy(final, header);
strcat(final, program);
strcat(final, footer);
strcat(final, funcs);
strcat(final, dataH);
strcat(final, data);
return final;
}
char* build_data() {
//TODO: fix LABEL and non-STRING types
int l = 0;
char* out = "";
for (int i = 0; i < currentLitId; i++) {
int lv = strlen((char*)literalData[i]->data);
int resl = 15 + lv;
char* line = malloc(sizeof(char) * (resl + 1));
snprintf(line, resl + 1, "%cAA: .asciz \"%s\"\n", i + 65, (char*)literalData[i]->data);
if (i == 0) {
out = malloc(sizeof(char) * (resl + 1));
}
else {
out = realloc(out, sizeof(char) * (l + resl + 1));
}
strcpy(out + l, line);
l += resl;
}
return out;
}
char* lib_funcs() {
if (includeStrlen) {
return "strlen: xor %rax, %rax\n"
"dec %rax\n"
"strlen_count: inc %rax\n"
"cmpb $0x0, (%rdi,%rax,1)\n"
"jne strlen_count\n"
"ret\n";
}
else {
return "";
}
}
char* compile_to_asm_internal(sym_t* symbol, int mangleId) {
char* out;
if (symbol->province == LITERAL) {
/* store the symbol in .data */
if (symbol->litType == STRING) {
/* temporary implementation */
literalData[currentLitId] = init_str_data((char*)symbol->name);
out = malloc(sizeof(char) * 16);
snprintf(out, 16, "mov $%cAA, \%rax\n", currentLitId + 65);
currentLitId++;
return out;
}
/*if (symbol->litType == INT) {
return init_sym_int(*((int*)symbol->name));
}
else if (symbol->litType == FLOAT) {
return init_sym_float(*((float*)symbol->name));
}
else if (symbol->litType == STRING) {
return init_sym_str((char*)symbol->name);
}
else {
return NULL;
}*/
}
else if (symbol->province == KEY_REF) {
/* TODO: mangle */
char* ir = try_comp_internal(symbol, ++currentMangleId);
if (ir != NULL) {
out = ir;
}
else {
}
return out;
/*sym_t* returnV = NULL;
hashtable_t* newScope = init_hashtable(50, parentScope);
sym_t* ir = try_comp_internal(symbol, newScope);
if (ir != NULL) {
returnV = ir;
}
else {
pair_t p = hashtable_get_pair_recurse(parentScope, (char*)symbol->name);
if (p.key != NULL) {
sym_t* nextSym = (sym_t*)p.value;
if (symbol->argCount > 0) {
returnV = eval_with_args(nextSym, symbol->args, symbol->argCount, newScope);
}
else {
returnV = eval(nextSym, newScope);
}
}
else {
printf("key %s not found in any scope\n", (char*)symbol->name);
}
}
destroy_hashtable(newScope);
return returnV; */
}
else {
printf("no symbol province\n");
return NULL;
}
}
char* comp_all(sym_t** symbols, int count, int mangleId) {
int l = 0;
char* out;
for (int i = 0; i < count; i++) {
char* res = compile_to_asm_internal(symbols[i], mangleId);
int resl = strlen(res);
if (i == 0) {
out = malloc(sizeof(char) * (resl + 1));
}
else {
out = realloc(out, sizeof(char) * (l + resl + 1));
}
strcpy(out + l, res);
l += resl;
}
return out;
}
char* try_comp_internal(sym_t* symbol, int mangleId) {
unsigned int hash = get_hash((char*)symbol->name);
if (hash == get_hash("root")) {
//todo--add return wrapper for last
return comp_all(symbol->args, symbol->argCount, mangleId);
}
else if (hash == get_hash("print")) {
includeStrlen = 1;
/* execute the argument to receive rax--return value */
char* pre = compile_to_asm_internal(symbol->args[0], mangleId);
char* body = "mov %rax, %rsi\n"
"mov %rsi, %rdi\n"
"call strlen\n"
"mov %rax, %rdx\n"
"mov $1, %rax\n"
"mov $1, %rdi\n"
"syscall\n";
pre = realloc(pre, sizeof(char) * (strlen(pre) + strlen(body) + 1));
strcat(pre, body);
return pre;
}
else {
return NULL;
}
}
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