Add comment to example/library's compressed input
diff --git a/example/library/library.c b/example/library/library.c
index 5c20f25..2a2438a 100644
--- a/example/library/library.c
+++ b/example/library/library.c
@@ -46,15 +46,31 @@
#define DST_BUFFER_SIZE (128 * 1024)
#endif
-// lgtm_ptr and lgtm_len hold a deflate-encoded "LGTM" message.
-uint8_t lgtm_ptr[] = {
- 0xf3, 0xc9, 0xcf, 0xcf, 0x2e, 0x56, 0x48, 0xcf, 0xcf, 0x4f,
- 0x51, 0x28, 0xc9, 0x57, 0xc8, 0x4d, 0xd5, 0xe3, 0x02, 0x00,
+// hello_ptr and hello_len hold a gzip-encoded "Hello Wuffs."
+//
+// $ echo "Hello Wuffs." | gzip --no-name | xxd
+// 00000000: 1f8b 0800 0000 0000 0003 f348 cdc9 c957 ...........H...W
+// 00000010: 082f 4d4b 2bd6 e302 003c 8475 bb0d 0000 ./MK+....<.u....
+// 00000020: 00 .
+//
+// Passing --no-name to the gzip command line also means to skip the timestamp,
+// which means that its output is deterministic.
+uint8_t hello_ptr[] = {
+ 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, // 00..07
+ 0x00, 0x03, 0xf3, 0x48, 0xcd, 0xc9, 0xc9, 0x57, // 08..0F
+ 0x08, 0x2f, 0x4d, 0x4b, 0x2b, 0xd6, 0xe3, 0x02, // 10..17
+ 0x00, 0x3c, 0x84, 0x75, 0xbb, 0x0d, 0x00, 0x00, // 18..1F
+ 0x00, // 20..20
};
-size_t lgtm_len = 20;
+size_t hello_len = 0x21;
-#define WORK_BUFFER_SIZE WUFFS_DEFLATE__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE
+#define WORK_BUFFER_SIZE WUFFS_GZIP__DECODER_WORKBUF_LEN_MAX_INCL_WORST_CASE
+#if WORK_BUFFER_SIZE > 0
uint8_t work_buffer[WORK_BUFFER_SIZE];
+#else
+// Not all C/C++ compilers support 0-length arrays.
+uint8_t work_buffer[1];
+#endif
// ignore_return_value suppresses errors from -Wall -Werror.
static void ignore_return_value(int ignored) {}
@@ -69,11 +85,11 @@
});
wuffs_base__io_buffer src = ((wuffs_base__io_buffer){
.data = ((wuffs_base__slice_u8){
- .ptr = lgtm_ptr,
- .len = lgtm_len,
+ .ptr = hello_ptr,
+ .len = hello_len,
}),
.meta = ((wuffs_base__io_buffer_meta){
- .wi = lgtm_len,
+ .wi = hello_len,
.ri = 0,
.pos = 0,
.closed = true,
@@ -82,22 +98,22 @@
wuffs_base__io_writer dst_writer = wuffs_base__io_buffer__writer(&dst);
wuffs_base__io_reader src_reader = wuffs_base__io_buffer__reader(&src);
- wuffs_deflate__decoder* dec = calloc(sizeof__wuffs_deflate__decoder(), 1);
+ wuffs_gzip__decoder* dec = calloc(sizeof__wuffs_gzip__decoder(), 1);
if (!dec) {
return "out of memory";
}
- const char* status = wuffs_deflate__decoder__initialize(
- dec, sizeof__wuffs_deflate__decoder(), WUFFS_VERSION,
+ const char* status = wuffs_gzip__decoder__initialize(
+ dec, sizeof__wuffs_gzip__decoder(), WUFFS_VERSION,
WUFFS_INITIALIZE__ALREADY_ZEROED);
if (status) {
free(dec);
return status;
}
- status = wuffs_deflate__decoder__decode_io_writer(dec, dst_writer, src_reader,
- ((wuffs_base__slice_u8){
- .ptr = work_buffer,
- .len = WORK_BUFFER_SIZE,
- }));
+ status = wuffs_gzip__decoder__decode_io_writer(dec, dst_writer, src_reader,
+ ((wuffs_base__slice_u8){
+ .ptr = work_buffer,
+ .len = WORK_BUFFER_SIZE,
+ }));
if (status) {
free(dec);
return status;
