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-rw-r--r--libiberty/ChangeLog9
-rw-r--r--libiberty/functions.texi8
-rw-r--r--libiberty/hex.c12
3 files changed, 25 insertions, 4 deletions
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 0669803..d30c591 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,12 @@
+2003-05-15 Jim Blandy <jimb@redhat.com>
+
+ * hex.c (_hex_value): Make this unsigned.
+ (hex_value): Update documentation for new return type. hex_value
+ now expands to an unsigned int expression, to avoid unexpected
+ sign extension when we store it in a bfd_vma, which is larger than
+ int on some platforms.
+ * functions.texi: Regenerated.
+
2003-05-07 Josef Zlomek <zlomekj@suse.cz>
* splay-tree.c (splay_tree_predecessor): Fix comment.
diff --git a/libiberty/functions.texi b/libiberty/functions.texi
index 4261d86..b34c204 100644
--- a/libiberty/functions.texi
+++ b/libiberty/functions.texi
@@ -337,13 +337,19 @@ or zero if it is not. Note that the value you pass will be cast to
@end deftypefn
@c hex.c:42
-@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
@c index.c:5
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 */