diff options
Diffstat (limited to 'source4/lib')
| -rw-r--r-- | source4/lib/compression/lzxpress.c | 32 | ||||
| -rw-r--r-- | source4/lib/compression/lzxpress.h | 6 |
2 files changed, 17 insertions, 21 deletions
diff --git a/source4/lib/compression/lzxpress.c b/source4/lib/compression/lzxpress.c index 506305176f..9ce4eb1e8d 100644 --- a/source4/lib/compression/lzxpress.c +++ b/source4/lib/compression/lzxpress.c @@ -32,7 +32,6 @@ * */ -#include "includes.h" #include "replace.h" #include "lzxpress.h" @@ -57,10 +56,10 @@ )) #endif -static uint32_t xpress_decompress(uint8_t *input, - uint32_t input_size, - uint8_t *output, - uint32_t output_size) +ssize_t lzxpress_decompress(const uint8_t *input, + uint32_t input_size, + uint8_t *output, + uint32_t max_output_size) { uint32_t output_index, input_index; uint32_t indicator, indicator_bit; @@ -112,11 +111,11 @@ static uint32_t xpress_decompress(uint8_t *input, if (length == 15) { length = input[input_index]; input_index += sizeof(uint8_t); - if (length == 255) { - length = PULL_LE_UINT16(input, input_index); - input_index += sizeof(uint16_t); - length -= (15 + 7); - } + if (length == 255) { + length = PULL_LE_UINT16(input, input_index); + input_index += sizeof(uint16_t); + length -= (15 + 7); + } length += 15; } length += 7; @@ -125,20 +124,15 @@ static uint32_t xpress_decompress(uint8_t *input, length += 3; do { - if (output_index >= output_size) break; + if ((output_index >= max_output_size) || ((offset + 1) > output_index)) break; + output[output_index] = output[output_index - offset - 1]; + output_index += sizeof(uint8_t); length -= sizeof(uint8_t); } while (length != 0); } - - } while ((output_index < output_size) && (input_index < input_size)); + } while ((output_index < max_output_size) && (input_index < (input_size))); return output_index; } - -uint32_t lzxpress_decompress(DATA_BLOB *inbuf, - DATA_BLOB *outbuf) -{ - return xpress_decompress(inbuf->data, inbuf->length, outbuf->data, outbuf->length); -} diff --git a/source4/lib/compression/lzxpress.h b/source4/lib/compression/lzxpress.h index 4862fd2635..c81dda8f85 100644 --- a/source4/lib/compression/lzxpress.h +++ b/source4/lib/compression/lzxpress.h @@ -37,7 +37,9 @@ #define XPRESS_BLOCK_SIZE 0x10000 -uint32_t lzxpress_decompress(DATA_BLOB *inbuf, - DATA_BLOB *outbuf); +ssize_t lzxpress_decompress(const uint8_t *input, + uint32_t input_size, + uint8_t *output, + uint32_t max_output_size); #endif /* _LZXPRESS_H */ |