X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fxpress-decompress.c;h=6756b159465d13e72ce5b071ce3531df7c74ef20;hp=de395de96afeecd3cdf3ad83fc62cdab00e1a3f4;hb=5873df008e648b9646b07c7d4eeda511adf92e28;hpb=4c16dabbfa70bc4c019463091acae1266f600113

diff --git a/src/xpress-decompress.c b/src/xpress-decompress.c
index de395de9..6756b159 100644
--- a/src/xpress-decompress.c
+++ b/src/xpress-decompress.c
@@ -6,7 +6,7 @@
 
 /*
  *
- * Copyright (C) 2012 Eric Biggers
+ * Copyright (C) 2012, 2013 Eric Biggers
  *
  * This file is part of wimlib, a library for working with WIM files.
  *
@@ -91,9 +91,10 @@
  *
  * Returns the match length, or -1 on error.
  */
-static int xpress_decode_match(unsigned huffsym, unsigned window_pos,
-			       unsigned window_len, u8 window[],
-			       struct input_bitstream *istream)
+static int
+xpress_decode_match(unsigned huffsym, unsigned window_pos,
+		    unsigned window_len, u8 window[],
+		    struct input_bitstream *istream)
 {
 	unsigned match_len;
 	unsigned match_offset;
@@ -162,11 +163,12 @@ static int xpress_decode_match(unsigned huffsym, unsigned window_pos,
 
 /* Decodes the Huffman-encoded matches and literal bytes in a block of
  * XPRESS-encoded data. */
-static int xpress_decompress_block(struct input_bitstream *istream,
-				   u8 uncompressed_data[],
-				   unsigned uncompressed_len,
-				   const u8 lens[],
-				   const u16 decode_table[])
+static int
+xpress_decompress_block(struct input_bitstream *istream,
+			u8 uncompressed_data[],
+			unsigned uncompressed_len,
+			const u8 lens[],
+			const u16 decode_table[])
 {
 	unsigned curpos;
 	unsigned huffsym;
@@ -178,7 +180,7 @@ static int xpress_decompress_block(struct input_bitstream *istream,
 		ret = read_huffsym(istream, decode_table, lens,
 				   XPRESS_NUM_SYMBOLS, XPRESS_TABLEBITS,
 				   &huffsym, XPRESS_MAX_CODEWORD_LEN);
-		if (ret != 0)
+		if (ret)
 			return ret;
 
 		if (huffsym < XPRESS_NUM_CHARS) {
@@ -198,8 +200,10 @@ static int xpress_decompress_block(struct input_bitstream *istream,
 }
 
 
-int xpress_decompress(const void *__compressed_data, unsigned compressed_len,
-		      void *uncompressed_data, unsigned uncompressed_len)
+/* Documented in wimlib.h */
+WIMLIBAPI int
+wimlib_xpress_decompress(const void *__compressed_data, unsigned compressed_len,
+			 void *uncompressed_data, unsigned uncompressed_len)
 {
 	u8 lens[XPRESS_NUM_SYMBOLS];
 	u16 decode_table[(1 << XPRESS_TABLEBITS) + 2 * XPRESS_NUM_SYMBOLS];
@@ -219,8 +223,10 @@ int xpress_decompress(const void *__compressed_data, unsigned compressed_len,
 	 * code lengths of these symbols are given literally as 4-bit integers
 	 * in the first 256 bytes of the compressed data.
 	 */
-	if (compressed_len < XPRESS_NUM_SYMBOLS / 2)
+	if (compressed_len < XPRESS_NUM_SYMBOLS / 2) {
+		ERROR("xpress_decompress(): Compressed length too short!");
 		return -1;
+	}
 
 	for (i = 0; i < XPRESS_NUM_SYMBOLS / 2; i++) {
 		*lens_p++ = compressed_data[i] & 0xf;
@@ -230,7 +236,7 @@ int xpress_decompress(const void *__compressed_data, unsigned compressed_len,
 	ret = make_huffman_decode_table(decode_table, XPRESS_NUM_SYMBOLS,
 					XPRESS_TABLEBITS, lens,
 					XPRESS_MAX_CODEWORD_LEN);
-	if (ret != 0)
+	if (ret)
 		return ret;
 
 	init_input_bitstream(&istream, compressed_data + XPRESS_NUM_SYMBOLS / 2,