raylib-physfs.c

#include <stdlib.h>

#include <raylib.h>
#include <physfs.h>

#include "raylib-physfs.h"

static unsigned char *LoadPhysfsFileData(const char *fileName, int *dataSize) {
	PHYSFS_File *file = PHYSFS_openRead(fileName);
	unsigned char *buffer = NULL;
	if (file) {
		PHYSFS_sint64 filesize = PHYSFS_fileLength(file);
		buffer = (unsigned char *) RL_MALLOC(filesize);
		if (buffer) {
			*dataSize = PHYSFS_readBytes(file, buffer, filesize);
		}
		PHYSFS_close(file);
	}
	return buffer;
}

static bool SavePhysfsFileData(const char *fileName, void *data, int dataSize) {
	PHYSFS_File *file = PHYSFS_openWrite(fileName);
	PHYSFS_sint64 writtenBytes = 0;
	if (file) {
		writtenBytes = PHYSFS_writeBytes(file, data, dataSize);
		PHYSFS_close(file);
	}
	return writtenBytes == dataSize;
}

static char *LoadPhysfsFileText(const char *fileName) {
	PHYSFS_File *file = PHYSFS_openRead(fileName);
	char *buffer = NULL;
	if (file) {
		PHYSFS_sint64 filesize = PHYSFS_fileLength(file);
		buffer = (char *) RL_MALLOC(filesize + 1);
		if (buffer) {
			PHYSFS_sint64 readBytes = PHYSFS_readBytes(file, buffer, filesize);
			if (readBytes > 0) {
				buffer[readBytes] = '\0';
			}
			else {
				RL_FREE(buffer);
				buffer = NULL;
			}
		}
		PHYSFS_close(file);
	}
	return nullptr;
}

static bool SavePhysfsFileText(const char *fileName, char *text) {
	PHYSFS_File *file = PHYSFS_openWrite(fileName);
	bool is_success = true;
	if (file) {
		is_success = false;
		for (const char *c = text; *c; c++) {
			PHYSFS_sint64 writtenBytes = PHYSFS_writeBytes(file, c, 1);
			if (writtenBytes <= 0) {
				is_success = false;
				break;
			}
		}
		PHYSFS_close(file);
	}
	return is_success;
}

void SetupRaylibPhysfs() {
	SetLoadFileDataCallback(LoadPhysfsFileData);
	SetSaveFileDataCallback(SavePhysfsFileData);
	SetLoadFileTextCallback(LoadPhysfsFileText);
	SetSaveFileTextCallback(SavePhysfsFileText);
}

raylib-physfs.h

#pragma once

/** 
 * Setup Raylib file callbacks using Physfs API
 *
 * After calling this, Raylib functions like "LoadTexture" and "LoadModel"
 * will use Physfs API to read/write files.
 */
void SetupRaylibPhysfs();