pngtile: src/lib/cache.c@d5e3089906da (annotated)

0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	1	#include "cache.h"
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	2	#include "shared/util.h"
6 766df7c9b90d --force-update and store palette Tero Marttila <terom@fixme.fi> parents: 4 diff changeset	3	#include "shared/log.h" // only LOG_DEBUG
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	4	#include "error.h"
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	5
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	6	#include <stdlib.h>
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	7	#include <unistd.h>
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	8	#include <sys/types.h>
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	9	#include <sys/stat.h>
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	10	#include <fcntl.h>
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	11	#include <sys/mman.h>
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	12	#include <errno.h>
6 766df7c9b90d --force-update and store palette Tero Marttila <terom@fixme.fi> parents: 4 diff changeset	13	#include <assert.h>
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	14
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	15
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	16	int pt_cache_new (struct pt_cache *cache_ptr, const char path, int mode)
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	17	{
cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	18	struct pt_cache *cache;
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	19	int err;
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	20
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	21	// alloc
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	22	if ((cache = calloc(1, sizeof(*cache))) == NULL)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	23	RETURN_ERROR(PT_ERR_MEM);
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	24
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	25	if ((cache->path = strdup(path)) == NULL)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	26	JUMP_SET_ERROR(err, PT_ERR_MEM);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	27
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	28	// init
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	29	cache->fd = -1;
3 da7c6dcafb43 store cache->mode, error handling for pt_image_update_cache Tero Marttila <terom@fixme.fi> parents: 2 diff changeset	30	cache->mode = mode;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	31
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	32	// ok
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	33	*cache_ptr = cache;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	34
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	35	return 0;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	36
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	37	error:
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	38	// cleanup
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	39	if (cache)
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	40	pt_cache_destroy(cache);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	41
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	42	return err;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	43	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	44
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	45	/**
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	46	* Open the cache file as an fd for reading
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	47	*
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	48	* XXX: use some kind of locking?
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	49	*/
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	50	static int pt_cache_open_read_fd (struct pt_cache cache, int fd_ptr)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	51	{
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	52	int fd;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	53
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	54	// actual open()
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	55	if ((fd = open(cache->path, O_RDONLY)) < 0)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	56	RETURN_ERROR_ERRNO(PT_ERR_OPEN_MODE, EACCES);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	57
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	58	// ok
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	59	*fd_ptr = fd;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	60
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	61	return 0;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	62	}
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	63
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	64	/**
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	65	* Read in the cache header from the open file
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	66	*/
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	67	static int pt_cache_read_header (int fd, struct pt_cache_header *header)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	68	{
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	69	size_t len = sizeof(*header);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	70	char buf = (char ) header;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	71
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	72	// seek to start
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	73	if (lseek(fd, 0, SEEK_SET) != 0)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	74	RETURN_ERROR(PT_ERR_CACHE_SEEK);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	75
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	76	// write out full header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	77	while (len) {
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	78	ssize_t ret;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	79
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	80	// try and write out the header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	81	if ((ret = read(fd, buf, len)) <= 0)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	82	RETURN_ERROR(PT_ERR_CACHE_READ);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	83
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	84	// update offset
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	85	buf += ret;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	86	len -= ret;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	87	}
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	88
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	89	// done
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	90	return 0;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	91	}
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	92
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	93	/**
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	94	* Read and return the version number from the cache file, temporarily opening it if needed
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	95	*/
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	96	static int pt_cache_version (struct pt_cache *cache)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	97	{
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	98	int fd;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	99	struct pt_cache_header header;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	100	int ret;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	101
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	102	// already open?
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	103	if (cache->file)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	104	return cache->file->header.version;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	105
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	106	// temp. open
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	107	if ((ret = pt_cache_open_read_fd(cache, &fd)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	108	return ret;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	109
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	110	// read header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	111	if ((ret = pt_cache_read_header(fd, &header)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	112	JUMP_ERROR(ret);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	113
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	114	// ok
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	115	ret = header.version;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	116
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	117	error:
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	118	// close
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	119	close(fd);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	120
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	121	return ret;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	122	}
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	123
8 400ddf1e7aa9 pt_image_status Tero Marttila <terom@fixme.fi> parents: 7 diff changeset	124	int pt_cache_status (struct pt_cache cache, const char img_path)
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	125	{
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	126	struct stat st_img, st_cache;
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	127	int ver;
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	128
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	129	// test original file
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	130	if (stat(img_path, &st_img) < 0)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	131	RETURN_ERROR(PT_ERR_IMG_STAT);
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	132
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	133	// test cache file
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	134	if (stat(cache->path, &st_cache) < 0) {
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	135	// always stale if it doesn't exist yet
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	136	if (errno == ENOENT)
8 400ddf1e7aa9 pt_image_status Tero Marttila <terom@fixme.fi> parents: 7 diff changeset	137	return PT_CACHE_NONE;
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	138	else
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	139	RETURN_ERROR(PT_ERR_CACHE_STAT);
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	140	}
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	141
05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	142	// compare mtime
8 400ddf1e7aa9 pt_image_status Tero Marttila <terom@fixme.fi> parents: 7 diff changeset	143	if (st_img.st_mtime > st_cache.st_mtime)
400ddf1e7aa9 pt_image_status Tero Marttila <terom@fixme.fi> parents: 7 diff changeset	144	return PT_CACHE_STALE;
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	145
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	146	// read version
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	147	if ((ver = pt_cache_version(cache)) < 0)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	148	// fail
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	149	return ver;
8 400ddf1e7aa9 pt_image_status Tero Marttila <terom@fixme.fi> parents: 7 diff changeset	150
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	151	// compare version
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	152	if (ver != PT_CACHE_VERSION)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	153	return PT_CACHE_INCOMPAT;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	154
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	155	// ok, should be in order
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	156	return PT_CACHE_FRESH;
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	157	}
cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	158
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	159	void pt_cache_info (struct pt_cache cache, struct pt_image_info info)
10 6806a90d934f make pt_cache_open no-op if already open, pt_image_info -> pt_cache_info Tero Marttila <terom@fixme.fi> parents: 9 diff changeset	160	{
54 4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	161	struct stat st;
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	162
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	163	if (cache->file)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	164	// img info
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	165	pt_png_info(&cache->file->header.png, info);
10 6806a90d934f make pt_cache_open no-op if already open, pt_image_info -> pt_cache_info Tero Marttila <terom@fixme.fi> parents: 9 diff changeset	166
54 4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	167	// stat
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	168	if (stat(cache->path, &st) < 0) {
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	169	// unknown
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	170	info->cache_mtime = 0;
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	171	info->cache_bytes = 0;
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	172	info->cache_blocks = 0;
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	173
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	174	} else {
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	175	// store
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	176	info->cache_version = pt_cache_version(cache);
54 4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	177	info->cache_mtime = st.st_mtime;
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	178	info->cache_bytes = st.st_size;
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	179	info->cache_blocks = st.st_blocks;
4a25113cb2a4 add some additional pt_image_info fields for stat Tero Marttila <terom@fixme.fi> parents: 53 diff changeset	180	}
10 6806a90d934f make pt_cache_open no-op if already open, pt_image_info -> pt_cache_info Tero Marttila <terom@fixme.fi> parents: 9 diff changeset	181	}
6806a90d934f make pt_cache_open no-op if already open, pt_image_info -> pt_cache_info Tero Marttila <terom@fixme.fi> parents: 9 diff changeset	182
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	183	/**
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	184	* Abort any incomplete open operation, cleaning up
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	185	*/
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	186	static void pt_cache_abort (struct pt_cache *cache)
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	187	{
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	188	if (cache->file != NULL) {
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	189	munmap(cache->file, sizeof(struct pt_cache_file) + cache->file->header.data_size);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	190
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	191	cache->file = NULL;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	192	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	193
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	194	if (cache->fd >= 0) {
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	195	close(cache->fd);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	196
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	197	cache->fd = -1;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	198	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	199	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	200
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	201	/**
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	202	* Open the .tmp cache file as an fd for writing
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	203	*/
6 766df7c9b90d --force-update and store palette Tero Marttila <terom@fixme.fi> parents: 4 diff changeset	204	static int pt_cache_open_tmp_fd (struct pt_cache cache, int fd_ptr)
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	205	{
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	206	int fd;
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	207	char tmp_path[1024];
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	208
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	209	// get .tmp path
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	210	if (path_with_fext(cache->path, tmp_path, sizeof(tmp_path), ".tmp"))
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	211	RETURN_ERROR(PT_ERR_PATH);
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	212
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	213	// open for write, create
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	214	// XXX: locking? At least O_EXCL...
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	215	if ((fd = open(tmp_path, O_RDWR \| O_CREAT, 0644)) < 0)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	216	RETURN_ERROR(PT_ERR_CACHE_OPEN_TMP);
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	217
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	218	// ok
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	219	*fd_ptr = fd;
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	220
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	221	return 0;
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	222	}
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	223
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	224
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	225	/**
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	226	* Mmap the pt_cache_file using sizeof(struct pt_cache_file) + data_size
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	227	*/
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	228	static int pt_cache_open_mmap (struct pt_cache cache, void *addr_ptr, size_t data_size, bool readonly)
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	229	{
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	230	int prot = 0;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	231	void *addr;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	232
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	233	// determine prot
6 766df7c9b90d --force-update and store palette Tero Marttila <terom@fixme.fi> parents: 4 diff changeset	234	prot \|= PROT_READ;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	235
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	236	if (!readonly) {
11 eb2a1472f084 PT_OPEN_UPDATE Tero Marttila <terom@fixme.fi> parents: 10 diff changeset	237	assert(cache->mode & PT_OPEN_UPDATE);
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	238
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	239	prot \|= PROT_WRITE;
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	240	}
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	241
53 8a3165c604f8 fix cache->size calculation to not include the header Tero Marttila <terom@fixme.fi> parents: 52 diff changeset	242	// mmap() the full file including header
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	243	if ((addr = mmap(NULL, sizeof(struct pt_cache_file) + data_size, prot, MAP_SHARED, cache->fd, 0)) == MAP_FAILED)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	244	RETURN_ERROR(PT_ERR_CACHE_MMAP);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	245
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	246	// ok
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	247	*addr_ptr = addr;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	248
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	249	return 0;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	250	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	251
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	252	int pt_cache_open (struct pt_cache *cache)
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	253	{
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	254	struct pt_cache_header header;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	255	int err;
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	256
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	257	// ignore if already open
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	258	if (cache->file)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	259	return 0;
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	260
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	261	// open the .cache in readonly mode
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	262	if ((err = pt_cache_open_read_fd(cache, &cache->fd)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	263	return err;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	264
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	265	// read in header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	266	if ((err = pt_cache_read_header(cache->fd, &header)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	267	JUMP_ERROR(err);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	268
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	269	// check version
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	270	if (header.version != PT_CACHE_VERSION)
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	271	JUMP_SET_ERROR(err, PT_ERR_CACHE_VERSION);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	272
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	273	// mmap the header + data
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	274	if ((err = pt_cache_open_mmap(cache, (void **) &cache->file, header.data_size, true)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	275	JUMP_ERROR(err);
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	276
a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	277	// done
a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	278	return 0;
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	279
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	280	error:
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	281	// cleanup
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	282	pt_cache_abort(cache);
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	283
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	284	return err;
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	285	}
a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	286
a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	287	/**
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	288	* Write out the cache header into the opened file
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	289	*/
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	290	static int pt_cache_write_header (struct pt_cache cache, const struct pt_cache_header header)
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	291	{
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	292	size_t len = sizeof(*header);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	293	const char buf = (const char ) header;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	294
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	295	// seek to start
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	296	if (lseek(cache->fd, 0, SEEK_SET) != 0)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	297	RETURN_ERROR(PT_ERR_CACHE_SEEK);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	298
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	299	// write out full header
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	300	while (len) {
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	301	ssize_t ret;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	302
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	303	// try and write out the header
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	304	if ((ret = write(cache->fd, buf, len)) <= 0)
baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	305	RETURN_ERROR(PT_ERR_CACHE_WRITE);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	306
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	307	// update offset
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	308	buf += ret;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	309	len -= ret;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	310	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	311
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	312	// done
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	313	return 0;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	314	}
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	315
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	316	/**
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	317	* Create a new .tmp cache file, open it, and write out the header.
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	318	*/
11 eb2a1472f084 PT_OPEN_UPDATE Tero Marttila <terom@fixme.fi> parents: 10 diff changeset	319	static int pt_cache_create (struct pt_cache cache, struct pt_cache_header header)
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	320	{
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	321	int err;
7 997906f5fd2d mmap header, implement pt_image_info (post-update) Tero Marttila <terom@fixme.fi> parents: 6 diff changeset	322
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	323	// no access
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	324	if (!(cache->mode & PT_OPEN_UPDATE))
baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	325	RETURN_ERROR(PT_ERR_OPEN_MODE);
2 05de54150a4c up to a test client Tero Marttila <terom@fixme.fi> parents: 1 diff changeset	326
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	327	// open as .tmp
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	328	if ((err = pt_cache_open_tmp_fd(cache, &cache->fd)))
baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	329	return err;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	330
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	331	// write header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	332	if ((err = pt_cache_write_header(cache, header)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	333	JUMP_ERROR(err);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	334
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	335	// grow file
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	336	if (ftruncate(cache->fd, sizeof(struct pt_cache_file) + header->data_size) < 0)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	337	JUMP_SET_ERROR(err, PT_ERR_CACHE_TRUNC);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	338
7 997906f5fd2d mmap header, implement pt_image_info (post-update) Tero Marttila <terom@fixme.fi> parents: 6 diff changeset	339	// mmap header and data
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	340	if ((err = pt_cache_open_mmap(cache, (void **) &cache->file, header->data_size, false)))
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	341	JUMP_ERROR(err);
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	342
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	343	// done
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	344	return 0;
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	345
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	346	error:
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	347	// cleanup
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	348	pt_cache_abort(cache);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	349
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	350	return err;
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	351	}
cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	352
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	353	/**
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	354	* Rename the opened .tmp to .cache
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	355	*/
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	356	static int pt_cache_create_done (struct pt_cache *cache)
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	357	{
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	358	char tmp_path[1024];
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	359
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	360	// get .tmp path
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	361	if (path_with_fext(cache->path, tmp_path, sizeof(tmp_path), ".tmp"))
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	362	RETURN_ERROR(PT_ERR_PATH);
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	363
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	364	// rename
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	365	if (rename(tmp_path, cache->path) < 0)
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	366	RETURN_ERROR(PT_ERR_CACHE_RENAME_TMP);
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	367
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	368	// ok
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	369	return 0;
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	370	}
49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	371
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	372	int pt_cache_update (struct pt_cache cache, struct pt_png_img img, const struct pt_image_params *params)
0 cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	373	{
cff7fac35cc2 initial code Tero Marttila <terom@fixme.fi> parents: diff changeset	374	struct pt_cache_header header;
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	375	int err;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	376
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	377	// XXX: check cache_mode
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	378	// XXX: close any already-opened cache file
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	379
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	380	// prep header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	381	header.version = PT_CACHE_VERSION;
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	382	header.format = PT_IMG_PNG;
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	383
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	384	// read img header
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	385	if ((err = pt_png_read_header(img, &header.png, &header.data_size)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	386	return err;
6 766df7c9b90d --force-update and store palette Tero Marttila <terom@fixme.fi> parents: 4 diff changeset	387
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	388	// save any params
52 148a120ea7d5 skip contiguous regions of some background color Tero Marttila <terom@fixme.fi> parents: 34 diff changeset	389	if (params)
148a120ea7d5 skip contiguous regions of some background color Tero Marttila <terom@fixme.fi> parents: 34 diff changeset	390	header.params = *params;
148a120ea7d5 skip contiguous regions of some background color Tero Marttila <terom@fixme.fi> parents: 34 diff changeset	391
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	392	// create/open .tmp and write out header
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	393	if ((err = pt_cache_create(cache, &header)))
baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	394	return err;
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	395
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	396	// decode to disk
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	397	if ((err = pt_png_decode(img, &cache->file->header.png, &cache->file->header.params, cache->file->data)))
52 148a120ea7d5 skip contiguous regions of some background color Tero Marttila <terom@fixme.fi> parents: 34 diff changeset	398	return err;
7 997906f5fd2d mmap header, implement pt_image_info (post-update) Tero Marttila <terom@fixme.fi> parents: 6 diff changeset	399
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	400	// done, commit .tmp
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	401	if ((err = pt_cache_create_done(cache)))
18 f92a24ab046e add missing lib/tile.* Tero Marttila <terom@fixme.fi> parents: 17 diff changeset	402	// XXX: pt_cache_abort?
17 baf3fe7c6354 add library error codes, and fix image fopen error handling Tero Marttila <terom@fixme.fi> parents: 15 diff changeset	403	return err;
4 49362b34116c open cache as .tmp, and rename to .cache when done Tero Marttila <terom@fixme.fi> parents: 3 diff changeset	404
12 3576e00388fd draw clipped tiles by filling in a zeros for the background pixels Tero Marttila <terom@fixme.fi> parents: 11 diff changeset	405	return 0;
3576e00388fd draw clipped tiles by filling in a zeros for the background pixels Tero Marttila <terom@fixme.fi> parents: 11 diff changeset	406	}
3576e00388fd draw clipped tiles by filling in a zeros for the background pixels Tero Marttila <terom@fixme.fi> parents: 11 diff changeset	407
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	408	int pt_cache_tile (struct pt_cache cache, struct pt_tile tile)
34 a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	409	{
a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	410	int err;
a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	411
a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	412	// ensure open
a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	413	if ((err = pt_cache_open(cache)))
a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	414	return err;
a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	415
56 d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	416	// render
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	417	if ((err = pt_png_tile(&cache->file->header.png, cache->file->data, tile)))
d5e3089906da major refactoring of pt_cache, split off all PNG processing into pt_png Tero Marttila <terom@fixme.fi> parents: 55 diff changeset	418	return err;
34 a387bc77ad52 implement zoom Tero Marttila <terom@fixme.fi> parents: 18 diff changeset	419
9 a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	420	return 0;
a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	421	}
a31048ff76a2 pt_cache_open, pt_image_tile Tero Marttila <terom@fixme.fi> parents: 8 diff changeset	422
1 f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	423	void pt_cache_destroy (struct pt_cache *cache)
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	424	{
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	425	free(cache->path);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	426
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	427	pt_cache_abort(cache);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	428
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	429	free(cache);
f3cde3db1fef basic image/cache code compiles Tero Marttila <terom@fixme.fi> parents: 0 diff changeset	430	}
11 eb2a1472f084 PT_OPEN_UPDATE Tero Marttila <terom@fixme.fi> parents: 10 diff changeset	431

author	Tero Marttila <terom@fixme.fi>
	Mon, 25 Jan 2010 01:41:25 +0200
changeset 56	d5e3089906da
parent 55	a3542e78ecd8
child 59	80135bdfd343
permissions	-rw-r--r--