2:46 a.m.
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...commit
http://git.netsurf-browser.org/libnsgif.git/commit/eebf25066c18fbf04b8324...
...tree
http://git.netsurf-browser.org/libnsgif.git/tree/eebf25066c18fbf04b832403...
The branch, tlsa/rewrite has been updated
via eebf25066c18fbf04b8324030f1989870bb0f38e (commit)
via 24c503f95e1f9ef726e546e616649120b666d15d (commit)
from 5e0642811e2edce8d8845fdf0bcb8f9eefc71f80 (commit)
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not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
commitdiff
http://git.netsurf-browser.org/libnsgif.git/commit/?id=eebf25066c18fbf04b...
commit eebf25066c18fbf04b8324030f1989870bb0f38e
Author: Michael Drake <tlsa(a)netsurf-browser.org>
Commit: Michael Drake <tlsa(a)netsurf-browser.org>
GIF: Constify raw source data.
diff --git a/include/libnsgif.h b/include/libnsgif.h
index ae6691c..d0d16ac 100644
--- a/include/libnsgif.h
+++ b/include/libnsgif.h
@@ -15,8 +15,8 @@
#ifndef _LIBNSGIF_H_
#define _LIBNSGIF_H_
+#include <stdint.h>
#include <stdbool.h>
-#include <inttypes.h>
/* Error return values */
typedef enum {
@@ -100,7 +100,7 @@ typedef struct gif_animation {
/** callbacks for bitmap functions */
gif_bitmap_callback_vt bitmap_callbacks;
/** pointer to GIF data */
- unsigned char *gif_data;
+ const uint8_t *gif_data;
/** width of GIF (may increase during decoding) */
unsigned int width;
/** heigth of GIF (may increase during decoding) */
diff --git a/src/libnsgif.c b/src/libnsgif.c
index c2a8c73..21f319e 100644
--- a/src/libnsgif.c
+++ b/src/libnsgif.c
@@ -527,7 +527,7 @@ static gif_result gif__update_bitmap(
*/
static gif_result gif__parse_extension_graphic_control(
struct gif_frame *frame,
- uint8_t *data,
+ const uint8_t *data,
size_t len)
{
/* 6-byte Graphic Control Extension is:
@@ -583,7 +583,7 @@ static gif_result gif__parse_extension_graphic_control(
*/
static gif_result gif__parse_extension_application(
struct gif_animation *gif,
- uint8_t *data,
+ const uint8_t *data,
size_t len)
{
/* 14-byte+ Application Extension is:
@@ -619,11 +619,11 @@ static gif_result gif__parse_extension_application(
static gif_result gif__parse_frame_extensions(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
- uint8_t *gif_data = *pos;
- uint8_t *gif_end = gif->gif_data + gif->buffer_size;
+ const uint8_t *gif_data = *pos;
+ const uint8_t *gif_end = gif->gif_data + gif->buffer_size;
int gif_bytes = gif_end - gif_data;
/* Initialise the extensions */
@@ -727,7 +727,7 @@ static gif_result gif__parse_frame_extensions(
static gif_result gif__parse_image_descriptor(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
const uint8_t *data = *pos;
@@ -783,7 +783,7 @@ static gif_result gif__parse_image_descriptor(
static gif_result gif__parse_colour_table(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
unsigned colour_table_size;
@@ -840,10 +840,10 @@ static gif_result gif__parse_colour_table(
static gif_result gif__parse_image_data(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
- uint8_t *data = *pos;
+ const uint8_t *data = *pos;
size_t len = gif->gif_data + gif->buffer_size - data;
uint32_t frame_idx = frame - gif->frames;
uint8_t minimum_code_size;
@@ -970,9 +970,9 @@ static gif_result gif__process_frame(
uint32_t frame_idx,
bool decode)
{
- uint8_t *pos;
- uint8_t *end;
gif_result ret;
+ const uint8_t *pos;
+ const uint8_t *end;
struct gif_frame *frame;
frame = gif__get_frame(gif, frame_idx);
@@ -980,7 +980,7 @@ static gif_result gif__process_frame(
return GIF_INSUFFICIENT_MEMORY;
}
- end = (uint8_t *)(gif->gif_data + gif->buffer_size);
+ end = gif->gif_data + gif->buffer_size;
if (decode) {
pos = gif->gif_data + frame->frame_pointer;
@@ -1057,7 +1057,7 @@ void gif_create(gif_animation *gif, gif_bitmap_callback_vt
*bitmap_callbacks)
/* exported function documented in libnsgif.h */
gif_result gif_initialise(gif_animation *gif, size_t size, unsigned char *data)
{
- uint8_t *gif_data;
+ const uint8_t *gif_data;
uint32_t index;
gif_result ret;
commitdiff
http://git.netsurf-browser.org/libnsgif.git/commit/?id=24c503f95e1f9ef726...
commit 24c503f95e1f9ef726e546e616649120b666d15d
Author: Michael Drake <tlsa(a)netsurf-browser.org>
Commit: Michael Drake <tlsa(a)netsurf-browser.org>
GIF: Don't write into the GIF source data to handle errors.
diff --git a/src/libnsgif.c b/src/libnsgif.c
index 2a1fdfe..c2a8c73 100644
--- a/src/libnsgif.c
+++ b/src/libnsgif.c
@@ -887,25 +887,13 @@ static gif_result gif__parse_image_data(
if (len < 1) return GIF_INSUFFICIENT_FRAME_DATA;
block_size = data[0] + 1;
/* Check if the frame data runs off the end of the file */
- if ((int)(len - block_size) < 0) {
- /* Try to recover by signaling the end of the gif.
- * Once we get garbage data, there is no logical way to
- * determine where the next frame is. It's probably
- * better to partially load the gif than not at all.
- */
- if (len >= 2) {
- data[0] = 0;
- data[1] = GIF_TRAILER;
- len = 1;
- data++;
- break;
- } else {
- return GIF_INSUFFICIENT_FRAME_DATA;
- }
- } else {
- len -= block_size;
- data += block_size;
+ if (block_size > len) {
+ block_size = len;
+ return GIF_OK;
}
+
+ len -= block_size;
+ data += block_size;
}
gif->frame_count = frame_idx + 1;
-----------------------------------------------------------------------
Summary of changes:
include/libnsgif.h | 4 ++--
src/libnsgif.c | 50 +++++++++++++++++++-------------------------------
2 files changed, 21 insertions(+), 33 deletions(-)
diff --git a/include/libnsgif.h b/include/libnsgif.h
index ae6691c..d0d16ac 100644
--- a/include/libnsgif.h
+++ b/include/libnsgif.h
@@ -15,8 +15,8 @@
#ifndef _LIBNSGIF_H_
#define _LIBNSGIF_H_
+#include <stdint.h>
#include <stdbool.h>
-#include <inttypes.h>
/* Error return values */
typedef enum {
@@ -100,7 +100,7 @@ typedef struct gif_animation {
/** callbacks for bitmap functions */
gif_bitmap_callback_vt bitmap_callbacks;
/** pointer to GIF data */
- unsigned char *gif_data;
+ const uint8_t *gif_data;
/** width of GIF (may increase during decoding) */
unsigned int width;
/** heigth of GIF (may increase during decoding) */
diff --git a/src/libnsgif.c b/src/libnsgif.c
index 2a1fdfe..21f319e 100644
--- a/src/libnsgif.c
+++ b/src/libnsgif.c
@@ -527,7 +527,7 @@ static gif_result gif__update_bitmap(
*/
static gif_result gif__parse_extension_graphic_control(
struct gif_frame *frame,
- uint8_t *data,
+ const uint8_t *data,
size_t len)
{
/* 6-byte Graphic Control Extension is:
@@ -583,7 +583,7 @@ static gif_result gif__parse_extension_graphic_control(
*/
static gif_result gif__parse_extension_application(
struct gif_animation *gif,
- uint8_t *data,
+ const uint8_t *data,
size_t len)
{
/* 14-byte+ Application Extension is:
@@ -619,11 +619,11 @@ static gif_result gif__parse_extension_application(
static gif_result gif__parse_frame_extensions(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
- uint8_t *gif_data = *pos;
- uint8_t *gif_end = gif->gif_data + gif->buffer_size;
+ const uint8_t *gif_data = *pos;
+ const uint8_t *gif_end = gif->gif_data + gif->buffer_size;
int gif_bytes = gif_end - gif_data;
/* Initialise the extensions */
@@ -727,7 +727,7 @@ static gif_result gif__parse_frame_extensions(
static gif_result gif__parse_image_descriptor(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
const uint8_t *data = *pos;
@@ -783,7 +783,7 @@ static gif_result gif__parse_image_descriptor(
static gif_result gif__parse_colour_table(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
unsigned colour_table_size;
@@ -840,10 +840,10 @@ static gif_result gif__parse_colour_table(
static gif_result gif__parse_image_data(
struct gif_animation *gif,
struct gif_frame *frame,
- uint8_t **pos,
+ const uint8_t **pos,
bool decode)
{
- uint8_t *data = *pos;
+ const uint8_t *data = *pos;
size_t len = gif->gif_data + gif->buffer_size - data;
uint32_t frame_idx = frame - gif->frames;
uint8_t minimum_code_size;
@@ -887,25 +887,13 @@ static gif_result gif__parse_image_data(
if (len < 1) return GIF_INSUFFICIENT_FRAME_DATA;
block_size = data[0] + 1;
/* Check if the frame data runs off the end of the file */
- if ((int)(len - block_size) < 0) {
- /* Try to recover by signaling the end of the gif.
- * Once we get garbage data, there is no logical way to
- * determine where the next frame is. It's probably
- * better to partially load the gif than not at all.
- */
- if (len >= 2) {
- data[0] = 0;
- data[1] = GIF_TRAILER;
- len = 1;
- data++;
- break;
- } else {
- return GIF_INSUFFICIENT_FRAME_DATA;
- }
- } else {
- len -= block_size;
- data += block_size;
+ if (block_size > len) {
+ block_size = len;
+ return GIF_OK;
}
+
+ len -= block_size;
+ data += block_size;
}
gif->frame_count = frame_idx + 1;
@@ -982,9 +970,9 @@ static gif_result gif__process_frame(
uint32_t frame_idx,
bool decode)
{
- uint8_t *pos;
- uint8_t *end;
gif_result ret;
+ const uint8_t *pos;
+ const uint8_t *end;
struct gif_frame *frame;
frame = gif__get_frame(gif, frame_idx);
@@ -992,7 +980,7 @@ static gif_result gif__process_frame(
return GIF_INSUFFICIENT_MEMORY;
}
- end = (uint8_t *)(gif->gif_data + gif->buffer_size);
+ end = gif->gif_data + gif->buffer_size;
if (decode) {
pos = gif->gif_data + frame->frame_pointer;
@@ -1069,7 +1057,7 @@ void gif_create(gif_animation *gif, gif_bitmap_callback_vt
*bitmap_callbacks)
/* exported function documented in libnsgif.h */
gif_result gif_initialise(gif_animation *gif, size_t size, unsigned char *data)
{
- uint8_t *gif_data;
+ const uint8_t *gif_data;
uint32_t index;
gif_result ret;
--
NetSurf GIF Decoder