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-rw-r--r--libiberty/hex.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/libiberty/hex.c b/libiberty/hex.c
index 5f82292..f425509 100644
--- a/libiberty/hex.c
+++ b/libiberty/hex.c
@@ -39,13 +39,19 @@ or zero if it is not. Note that the value you pass will be cast to
@end deftypefn
-@deftypefn Extension int hex_value (int @var{c})
+@deftypefn Extension unsigned int hex_value (int @var{c})
Returns the numeric equivalent of the given character when interpreted
as a hexidecimal digit. The result is undefined if you pass an
invalid hex digit. Note that the value you pass will be cast to
@code{unsigned char} within the macro.
+The @code{hex_value} macro returns @code{unsigned int}, rather than
+signed @code{int}, to make it easier to use in parsing addresses from
+hex dump files: a signed @code{int} would be sign-extended when
+converted to a wider unsigned type --- like @code{bfd_vma}, on some
+systems.
+
@end deftypefn
@undocumented _hex_array_size
@@ -60,7 +66,7 @@ invalid hex digit. Note that the value you pass will be cast to
&& 'A' == 0x41 && 'a' == 0x61 && '!' == 0x21 \
&& EOF == -1
-const char _hex_value[_hex_array_size] =
+const unsigned char _hex_value[_hex_array_size] =
{
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* NUL SOH STX ETX */
_hex_bad, _hex_bad, _hex_bad, _hex_bad, /* EOT ENQ ACK BEL */
@@ -139,7 +145,7 @@ const char _hex_value[_hex_array_size] =
#else
-char _hex_value[_hex_array_size];
+unsigned char _hex_value[_hex_array_size];
#endif /* not ASCII */