89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdint.h>
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#define MEMORY_SIZE 4096
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#define PROGRAM_START 512
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enum ExitCodes {
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COMPLETED_SUCCESSFULLY,
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FILE_NOT_PROVIDED,
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FILE_MISSING,
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PROGRAM_TOO_LARGE,
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MEMORY_ALLOCATION_FAILURE,
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};
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// TODO: Add additional members
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// i.e. registers
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typedef struct ChipEight {
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uint8_t memory[MEMORY_SIZE] ;
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} chip_eight_t;
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void println(const char *format, ...) {
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va_list args;
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va_start(args, format);
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vprintf(format, args);
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va_end(args);
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printf("\n");
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}
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int main(int argc, char *argv[]) {
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if (argc < 2) {
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println("You fucked up bro! We need a file to load into memory.");
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println("Usage: chip.exe <file-to-load>");
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return FILE_NOT_PROVIDED;
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}
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char* file_path = argv[1];
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println("Loading file at %s...", file_path);
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FILE *file_ptr = fopen(file_path, "rb");
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if (file_ptr == NULL) {
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println("File '%s' does not exist.", file_path);
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return FILE_MISSING;
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}
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fseek(file_ptr, 0, SEEK_END);
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int num_of_bytes = ftell(file_ptr);
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int max_program_size = MEMORY_SIZE - PROGRAM_START;
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if (num_of_bytes > max_program_size) {
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println("File at '%s' exceeds max program size of %d", file_path, max_program_size);
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return PROGRAM_TOO_LARGE;
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}
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fseek(file_ptr, 0, SEEK_SET);
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chip_eight_t *chip = malloc(sizeof(chip_eight_t));
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if (chip == NULL) {
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println("Failed to allocate memory for chip.");
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return MEMORY_ALLOCATION_FAILURE;
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}
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fread(&chip->memory[PROGRAM_START], sizeof(uint8_t), num_of_bytes, file_ptr);
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println("File '%s' loaded successfully", file_path);
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fclose(file_ptr);
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// TODO: Parse instructions
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println("INSTRUCTIONS:");
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for (int i = 0; i < MEMORY_SIZE; i++) {
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println("%d: %x ", i, chip->memory[i]);
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}
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free(chip);
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return COMPLETED_SUCCESSFULLY;
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}
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