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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "image.h"
#define ARRAY_LEN(arr) sizeof(arr) / sizeof(arr[0])
#define FORMAT_ERROR "%s is not in a supported format\n"
typedef size_t (*splash_func)(uint8_t**, size_t);
typedef struct {
char* extension;
splash_func func;
} splash_types;
const splash_types in_conversions[] = {
{ .extension = "bin", .func = bin_to_rgba },
{ .extension = "png", .func = png_to_rgba },
};
const splash_types out_conversions[] = {
{ .extension = "bin", .func = rgba_to_bin },
{ .extension = "png", .func = rgba_to_png },
};
int main(int argc, char** argv)
{
FILE* in_fd = NULL;
FILE* out_fd = NULL;
int retval = EXIT_SUCCESS;
if (argc < 3)
{
fprintf(stderr, "%s [input] [output]\n", argv[0]);
retval = EXIT_FAILURE;
goto exit;
}
char* in_path = argv[1];
size_t in_path_len = strlen(in_path);
splash_func in_func = NULL;
char* out_path = argv[2];
size_t out_path_len = strlen(out_path);
splash_func out_func = NULL;
for (size_t i = 0; i <= ARRAY_LEN(in_conversions); ++i)
{
if (i == ARRAY_LEN(in_conversions))
{
fprintf(stderr, FORMAT_ERROR, in_path);
retval = EXIT_FAILURE;
goto exit;
}
char* extension = in_conversions[i].extension;
if (!strcmp(in_path+(in_path_len-strlen(extension)), extension))
{
in_func = in_conversions[i].func;
break;
}
}
for (size_t i = 0; i <= ARRAY_LEN(out_conversions); ++i)
{
if (i == ARRAY_LEN(out_conversions))
{
fprintf(stderr, FORMAT_ERROR, out_path);
retval = EXIT_FAILURE;
goto exit;
}
char* extension = out_conversions[i].extension;
if (!strcmp(out_path+(out_path_len-strlen(extension)), extension))
{
out_func = out_conversions[i].func;
break;
}
}
in_fd = fopen(in_path, "rb");
if (!in_fd)
{
fprintf(stderr, "cannot open %s\n", in_path);
retval = EXIT_FAILURE;
goto exit;
}
fseek(in_fd, 0L, SEEK_END);
size_t in_size = (size_t)ftell(in_fd);
rewind(in_fd);
if (!in_size)
{
fprintf(stderr, "%s is empty\n", in_path);
retval = EXIT_FAILURE;
goto exit;
}
out_fd = fopen(out_path, "wb");
if (!out_fd)
{
fprintf(stderr, "cannot open %s\n", out_path);
retval = EXIT_FAILURE;
goto exit;
}
uint8_t* buf = malloc(in_size+1);
fread(buf, 1, in_size, in_fd);
buf[in_size] = '\0';
if (in_func)
{
in_size = in_func(&buf, in_size);
}
if (out_func)
{
in_size = out_func(&buf, in_size);
}
fwrite(buf, 1, in_size, out_fd);
exit:
if (in_fd) fclose(in_fd);
if (out_fd) fclose(out_fd);
return retval;
}
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