cground/src/compiler.c

#include "compiler.h"
#include "interpreter.h"
#include "types.h"
#include "include/estr.h"
#include <stdint.h>

char* compileGroundProgram(GroundProgram* program) {
    Estr start = CREATE_ESTR("global _start\nsection .text\n_start:\n");
    Estr data = CREATE_ESTR("section .rodata\n");

    // Create data section
    for (size_t i = 0; i < program->size; i++) {
        
    }

    // Generate assembly
    for (size_t i = 0; i < program->size; i++) {
        GroundInstruction gi = program->instructions[i];
        switch (gi.type) {
            case END: {
                if (gi.args.length < 1) {
                    runtimeError(TOO_FEW_ARGS, "Expecting 1 arg for end instruction", &gi, i);
                }
                if (gi.args.length > 1) {
                    runtimeError(TOO_MANY_ARGS, "Expecting 1 arg for end instruction", &gi, i);
                }
                if (gi.args.args[0].type != VALUE) {
                    runtimeError(ARG_TYPE_MISMATCH, "Expecting an Int for end instruction", &gi, i);
                }
                if (gi.args.args[0].value.value.type != INT) {
                    runtimeError(ARG_TYPE_MISMATCH, "Expecting an Int for end instruction", &gi, i);
                }

                int64_t bigretint = gi.args.args[0].value.value.data.intVal;
                int retint;
                if (bigretint > 255) {
                    retint = 255;
                }
                else if (bigretint < 0) {
                    retint = 0;
                }
                else {
                    retint = bigretint;
                }
                char retstr[8];
                snprintf(retstr, sizeof(retstr), "%d", retint);
                APPEND_ESTR(start, "  mov rax, 60\n");
                APPEND_ESTR(start, "  mov rdi, ");
                APPEND_ESTR(start, retstr);
                APPEND_ESTR(start, "\n");
                APPEND_ESTR(start, "  syscall\n");
                break;
            }
            default: {
                printf("no\n");
                exit(1);
            }
        }
    }

    Estr complete = CREATE_ESTR("");
    APPEND_ESTR(complete, start.str);
    APPEND_ESTR(complete, data.str)

    return complete.str;
}