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task_patch.c - cleanups

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This commit is contained in:
twinaphex 2017-05-13 22:21:57 +02:00
parent 6433cde3c0
commit 8ae708576f
1 changed files with 62 additions and 31 deletions
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93
tasks/task_patch.c
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@ -62,22 +62,37 @@ enum patch_error
struct bps_data
{
const uint8_t *modify_data, *source_data;
const uint8_t *modify_data;
const uint8_t *source_data;
uint8_t *target_data;
size_t modify_length, source_length, target_length;
size_t modify_offset, source_offset, target_offset;
uint32_t modify_checksum, source_checksum, target_checksum;
size_t source_relative_offset, target_relative_offset, output_offset;
size_t modify_length;
size_t source_length;
size_t target_length;
size_t modify_offset;
size_t source_offset;
size_t target_offset;
uint32_t modify_checksum;
uint32_t source_checksum;
uint32_t target_checksum;
size_t source_relative_offset;
size_t target_relative_offset;
size_t output_offset;
};
struct ups_data
{
const uint8_t *patch_data, *source_data;
const uint8_t *patch_data;
const uint8_t *source_data;
uint8_t *target_data;
unsigned patch_length, source_length, target_length;
unsigned patch_offset, source_offset, target_offset;
unsigned patch_checksum, source_checksum, target_checksum;
unsigned patch_length;
unsigned source_length;
unsigned target_length;
unsigned patch_offset;
unsigned source_offset;
unsigned target_offset;
unsigned patch_checksum;
unsigned source_checksum;
unsigned target_checksum;
};
typedef enum patch_error (*patch_func_t)(const uint8_t*, size_t,
@ -127,7 +142,7 @@ static enum patch_error bps_apply_patch(
size_t modify_source_size;
size_t modify_target_size;
size_t modify_markup_size;
struct bps_data bps = {0};
struct bps_data bps;
uint32_t modify_source_checksum = 0;
uint32_t modify_target_checksum = 0;
uint32_t modify_modify_checksum = 0;
@ -135,22 +150,32 @@ static enum patch_error bps_apply_patch(
if (modify_length < 19)
return PATCH_PATCH_TOO_SMALL;
bps.modify_data = modify_data;
bps.modify_length = modify_length;
bps.target_data = target_data;
bps.target_length = *target_length;
bps.source_data = source_data;
bps.source_length = source_length;
bps.modify_checksum = ~0;
bps.target_checksum = ~0;
bps.modify_data = modify_data;
bps.source_data = source_data;
bps.target_data = target_data;
bps.modify_length = modify_length;
bps.source_length = source_length;
bps.target_length = *target_length;
bps.modify_offset = 0;
bps.source_offset = 0;
bps.target_offset = 0;
bps.modify_checksum = ~0;
bps.source_checksum = 0;
bps.target_checksum = ~0;
bps.source_relative_offset = 0;
bps.target_relative_offset = 0;
bps.output_offset = 0;
if ((bps_read(&bps) != 'B') || (bps_read(&bps) != 'P') ||
(bps_read(&bps) != 'S') || (bps_read(&bps) != '1'))
if ( (bps_read(&bps) != 'B') ||
(bps_read(&bps) != 'P') ||
(bps_read(&bps) != 'S') ||
(bps_read(&bps) != '1'))
return PATCH_PATCH_INVALID_HEADER;
modify_source_size = bps_decode(&bps);
modify_target_size = bps_decode(&bps);
modify_markup_size = bps_decode(&bps);
for (i = 0; i < modify_markup_size; i++)
bps_read(&bps);
@ -294,13 +319,13 @@ static enum patch_error ups_apply_patch(
uint8_t *targetdata, size_t *targetlength)
{
size_t i;
struct ups_data data;
unsigned source_read_length;
unsigned target_read_length;
uint32_t patch_result_checksum;
uint32_t patch_read_checksum = 0;
uint32_t source_read_checksum = 0;
uint32_t target_read_checksum = 0;
struct ups_data data = {0};
data.patch_data = patchdata;
data.source_data = sourcedata;
@ -308,31 +333,37 @@ static enum patch_error ups_apply_patch(
data.patch_length = (unsigned)patchlength;
data.source_length = (unsigned)sourcelength;
data.target_length = (unsigned)*targetlength;
data.patch_offset = 0;
data.source_offset = 0;
data.target_offset = 0;
data.patch_checksum = ~0;
data.source_checksum = ~0;
data.target_checksum = ~0;
if (data.patch_length < 18)
return PATCH_PATCH_INVALID;
if (ups_patch_read(&data) != 'U')
return PATCH_PATCH_INVALID;
if (ups_patch_read(&data) != 'P')
return PATCH_PATCH_INVALID;
if (ups_patch_read(&data) != 'S')
return PATCH_PATCH_INVALID;
if (ups_patch_read(&data) != '1')
if (
(ups_patch_read(&data) != 'U') ||
(ups_patch_read(&data) != 'P') ||
(ups_patch_read(&data) != 'S') ||
(ups_patch_read(&data) != '1')
)
return PATCH_PATCH_INVALID;
source_read_length = (unsigned)ups_decode(&data);
target_read_length = (unsigned)ups_decode(&data);
if (data.source_length != source_read_length
&& data.source_length != target_read_length)
if ( (data.source_length != source_read_length)
&& (data.source_length != target_read_length))
return PATCH_SOURCE_INVALID;
*targetlength = (data.source_length == source_read_length ?
target_read_length : source_read_length);
if (data.target_length < *targetlength)
return PATCH_TARGET_TOO_SMALL;
data.target_length = (unsigned)*targetlength;
while (data.patch_offset < data.patch_length - 12)