86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/* jh_io.h - v0.01 - Jason Hilder
|
|
|
|
Heavily inspired and designed from:
|
|
* https://github.com/nothings/stb/
|
|
* https://github.com/gingerBill/gb/
|
|
|
|
This is a single header file that contains:
|
|
- useful/common I/O helpers
|
|
|
|
To use this library, do this in *one* C:
|
|
#define JH_IO_IMPLEMENTATION
|
|
#include "jh_io.h"
|
|
*/
|
|
|
|
#ifndef JH_IO_INCLUDED
|
|
#define JH_IO_INCLUDED
|
|
|
|
int jh_read_file_to_buffer(char* file_path, char** out_buffer, int add_terminator);
|
|
|
|
// --------------------------------------
|
|
// --------------------------------------
|
|
// implementation Below
|
|
// --------------------------------------
|
|
|
|
#ifdef JH_IO_IMPLEMENTATION
|
|
|
|
// --------------------------------------
|
|
// FILE I/O helpers:
|
|
// --------------------------------------
|
|
|
|
// Takes file path and a buffer which will get reallocated to the full file size.
|
|
// Note: buffer still needs to be manually free'd
|
|
int jh_read_file_to_buffer(char* file_path, char** out_buffer, int add_terminator)
|
|
{
|
|
FILE *file = fopen(file_path, "rb");
|
|
if(file == NULL)
|
|
{
|
|
perror("Failed to open file.");
|
|
return -1;
|
|
}
|
|
|
|
fseek(file, 0L, SEEK_END);
|
|
long file_size = ftell(file);
|
|
if (file_size == -1)
|
|
{
|
|
perror("Failed to determine file size");
|
|
fclose(file);
|
|
return -1;
|
|
}
|
|
rewind(file);
|
|
|
|
// Reallocate memory for the buffer, check if realloc is successful
|
|
// Realloc with extra space if terminator is needed
|
|
char *buffer = realloc(*out_buffer, file_size + (add_terminator ? 1 : 0));
|
|
if (buffer == NULL)
|
|
{
|
|
perror("Memory allocation failed");
|
|
fclose(file);
|
|
return -1;
|
|
}
|
|
|
|
// Update the pointer to the newly allocated buffer
|
|
*out_buffer = buffer;
|
|
|
|
size_t bytes_read = fread(*out_buffer, 1, file_size, file);
|
|
if (bytes_read != file_size)
|
|
{
|
|
perror("Error reading file");
|
|
fclose(file);
|
|
return -1;
|
|
}
|
|
|
|
// Add null terminator if needed
|
|
if (add_terminator == 1)
|
|
{
|
|
(*out_buffer)[file_size] = '\0';
|
|
}
|
|
|
|
fclose(file);
|
|
return 0;
|
|
}
|
|
|
|
|
|
#endif
|
|
#endif
|