lzx_write_compressed_tree(), lzx_read_code_lens(): Specify signed char

[wimlib] / src / lzx-decompress.c

diff --git a/src/lzx-decompress.c b/src/lzx-decompress.c
index 93ab84137be886c773757bdb86e86c22b2abcad4..1d0d04dfaf9b103b5ea356480f06c0e434aa59ac 100644 (file)
--- a/src/lzx-decompress.c
+++ b/src/lzx-decompress.c
@@ -244,7 +244,7 @@ lzx_read_code_lens(struct input_bitstream *istream, u8 lens[],
                unsigned num_zeroes;
                unsigned code;
                unsigned num_same;
-               char value;
+               signed char value;
 
                ret = read_huffsym_using_pretree(istream, pretree_decode_table,
                                                 pretree_lens, &tree_code);
@@ -284,7 +284,7 @@ lzx_read_code_lens(struct input_bitstream *istream, u8 lens[],
                                                         &code);
                        if (ret != 0)
                                return ret;
-                       value = (char)*lens - (char)code;
+                       value = (signed char)*lens - (signed char)code;
                        if (value < 0)
                                value += 17;
                        while (num_same--) {
@@ -294,7 +294,7 @@ lzx_read_code_lens(struct input_bitstream *istream, u8 lens[],
                        }
                        break;
                default: /* Difference from old length. */
-                       value = (char)*lens - (char)tree_code;
+                       value = (signed char)*lens - (signed char)tree_code;
                        if (value < 0)
                                value += 17;
                        *lens = value;