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Rewrite tools/pokemon_animation.c

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This commit is contained in:
Rangi
2021-09-02 18:37:36 -04:00
parent a18f83b911
commit 021702628c
4 changed files with 142 additions and 214 deletions
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24
tools/common.h
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@@ -25,6 +25,15 @@ void *malloc_verbose(size_t size) {
return m;
}
void *calloc_verbose(size_t size) {
errno = 0;
void *m = calloc(size, 1);
if (!m) {
error_exit("Could not allocate %zu bytes: %s\n", size, strerror(errno));
}
return m;
}
FILE *fopen_verbose(const char *filename, char rw) {
char mode[3] = {rw, 'b', '\0'};
errno = 0;
@@ -100,4 +109,19 @@ uint32_t read_png_width_verbose(const char *filename) {
return (bytes[0] << 24) | (bytes[1] << 16) | (bytes[2] << 8) | bytes[3];
}
void read_dimensions(const char *filename, int *width) {
long filesize;
uint8_t *bytes = read_u8(filename, &filesize);
if (filesize != 1) {
error_exit("%s: invalid dimensions file\n", filename);
}
uint8_t dimensions = bytes[0];
free(bytes);
*width = dimensions & 0xF;
int height = dimensions >> 4;
if (*width != height || (*width != 5 && *width != 6 && *width != 7)) {
error_exit("%s: invalid dimensions: %dx%d tiles\n", filename, *width, height);
}
}
#endif // GUARD_COMMON_H