merge from gcc
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@ -1,3 +1,10 @@
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2002-03-27 DJ Delorie <dj@redhat.com>
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* hex.c: Add documentation.
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(_hex_value): Provide non-ASCII empty table.
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(hex_init): Initialize the non-ASCII table.
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* functions.texi: Regenerate.
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2002-03-27 Mark Mitchell <mark@codesourcery.com>
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* dyn-string.c: Add libgcc exception to copyright notice.
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@ -317,6 +317,34 @@ between calls to @code{getpwd}.
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@end deftypefn
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@c hex.c:25
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@deftypefn Extension void hex_init (void)
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Initializes the array mapping the current character set to
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corresponding hex values. This function must be called before any
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call to @code{hex_p} or @code{hex_value}.
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@end deftypefn
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@c hex.c:33
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@deftypefn Extension int hex_p (int @var{c})
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Evaluates to non-zero if the given character is a valid hex character,
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or zero if it is not. Note that the value you pass will be cast to
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@code{unsigned char} within the macro.
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@end deftypefn
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@c hex.c:41
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@deftypefn Extension int hex_value (int @var{c})
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Returns the numeric equivalent of the given character when interpreted
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as a hexidecimal digit. The result is undefined if you pass an
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invalid hex digit. Note that the value you pass will be cast to
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@code{unsigned char} within the macro.
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@end deftypefn
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@c index.c:5
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@deftypefn Supplemental char* index (char *@var{s}, int @var{c})
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@ -20,11 +20,40 @@ Boston, MA 02111-1307, USA. */
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#include <stdio.h> /* for EOF */
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#include "libiberty.h"
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/* Provided for ABI compatibility. */
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void
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hex_init ()
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{
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}
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/*
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@deftypefn Extension void hex_init (void)
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Initializes the array mapping the current character set to
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corresponding hex values. This function must be called before any
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call to @code{hex_p} or @code{hex_value}. If you fail to call it, a
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default ASCII-based table will normally be used on ASCII systems.
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@end deftypefn
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@deftypefn Extension int hex_p (int @var{c})
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Evaluates to non-zero if the given character is a valid hex character,
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or zero if it is not. Note that the value you pass will be cast to
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@code{unsigned char} within the macro.
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@end deftypefn
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@deftypefn Extension int hex_value (int @var{c})
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Returns the numeric equivalent of the given character when interpreted
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as a hexidecimal digit. The result is undefined if you pass an
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invalid hex digit. Note that the value you pass will be cast to
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@code{unsigned char} within the macro.
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@end deftypefn
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@undocumented _hex_array_size
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@undocumented _hex_bad
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@undocumented _hex_value
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*/
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/* Are we ASCII? */
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#if '\n' == 0x0A && ' ' == 0x20 && '0' == 0x30 \
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@ -106,6 +135,46 @@ const char _hex_value[_hex_array_size] =
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_hex_bad, _hex_bad, _hex_bad, _hex_bad,
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_hex_bad, _hex_bad, _hex_bad, _hex_bad,
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};
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#define HEX_TABLE_INITIALIZED
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#else
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#error "Unsupported host character set"
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char _hex_value[_hex_array_size];
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#endif /* not ASCII */
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void
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hex_init ()
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{
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#ifndef HEX_TABLE_INITIALIZED
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int i;
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for (i=0; i<_hex_array_size; i++)
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{
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switch (i)
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{
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case '0': _hex_value[i] = 0; break;
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case '1': _hex_value[i] = 1; break;
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case '2': _hex_value[i] = 2; break;
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case '3': _hex_value[i] = 3; break;
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case '4': _hex_value[i] = 4; break;
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case '5': _hex_value[i] = 5; break;
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case '6': _hex_value[i] = 6; break;
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case '7': _hex_value[i] = 7; break;
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case '8': _hex_value[i] = 8; break;
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case '9': _hex_value[i] = 9; break;
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case 'a': case 'A': _hex_value[i] = 10; break;
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case 'b': case 'B': _hex_value[i] = 11; break;
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case 'c': case 'C': _hex_value[i] = 12; break;
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case 'd': case 'D': _hex_value[i] = 13; break;
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case 'e': case 'E': _hex_value[i] = 14; break;
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case 'f': case 'F': _hex_value[i] = 15; break;
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default:
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_hex_value[i] = _hex_bad;
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break;
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}
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}
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#endif
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}
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