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(patch.c) Safety checks - style nits

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This commit is contained in:
twinaphex 2015-03-12 04:11:12 +01:00
parent bdd5ac59ea
commit 3dbadc3c51
1 changed files with 21 additions and 17 deletions
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38
patch.c
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@ -73,6 +73,9 @@ static uint64_t bps_decode(struct bps_data *bps)
static void bps_write(struct bps_data *bps, uint8_t data)
{
if (!bps)
return;
bps->target_data[bps->output_offset++] = data;
bps->target_checksum = crc32_adjust(bps->target_checksum, data);
}
@ -198,7 +201,7 @@ struct ups_data
static uint8_t ups_patch_read(struct ups_data *data)
{
if (data->patch_offset < data->patch_length)
if (data && data->patch_offset < data->patch_length)
{
uint8_t n = data->patch_data[data->patch_offset++];
data->patch_checksum = crc32_adjust(data->patch_checksum, n);
@ -209,7 +212,7 @@ static uint8_t ups_patch_read(struct ups_data *data)
static uint8_t ups_source_read(struct ups_data *data)
{
if (data->source_offset < data->source_length)
if (data && data->source_offset < data->source_length)
{
uint8_t n = data->source_data[data->source_offset++];
data->source_checksum = crc32_adjust(data->source_checksum, n);
@ -220,13 +223,14 @@ static uint8_t ups_source_read(struct ups_data *data)
static void ups_target_write(struct ups_data *data, uint8_t n)
{
if (data->target_offset < data->target_length)
if (data && data->target_offset < data->target_length)
{
data->target_data[data->target_offset] = n;
data->target_checksum = crc32_adjust(data->target_checksum, n);
}
data->target_offset++;
if (data)
data->target_offset++;
}
static uint64_t ups_decode(struct ups_data *data)
@ -255,13 +259,13 @@ patch_error_t ups_apply_patch(
target_read_checksum = 0, patch_result_checksum;
struct ups_data data = {0};
data.patch_data = patchdata;
data.source_data = sourcedata;
data.target_data = targetdata;
data.patch_length = patchlength;
data.source_length = sourcelength;
data.target_length = *targetlength;
data.patch_checksum = ~0;
data.patch_data = patchdata;
data.source_data = sourcedata;
data.target_data = targetdata;
data.patch_length = patchlength;
data.source_length = sourcelength;
data.target_length = *targetlength;
data.patch_checksum = ~0;
data.source_checksum = ~0;
data.target_checksum = ~0;
@ -430,14 +434,14 @@ static bool apply_patch_content(uint8_t **buf,
ssize_t *size, const char *patch_desc, const char *patch_path,
patch_func_t func)
{
void *patch_data = NULL;
size_t target_size;
patch_error_t err = PATCH_UNKNOWN;
bool success = false;
uint8_t *patched_content = NULL;
ssize_t ret_size = *size;
uint8_t *ret_buf = *buf;
ssize_t patch_size;
void *patch_data = NULL;
patch_error_t err = PATCH_UNKNOWN;
bool success = false;
uint8_t *patched_content = NULL;
ssize_t ret_size = *size;
uint8_t *ret_buf = *buf;
if (!read_file(patch_desc, &patch_data, &patch_size))
return false;