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Diffstat (limited to 'gcc-4.2.1-5666.3/libiberty/strverscmp.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/libiberty/strverscmp.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/gcc-4.2.1-5666.3/libiberty/strverscmp.c b/gcc-4.2.1-5666.3/libiberty/strverscmp.c deleted file mode 100644 index 04e1e4ae9..000000000 --- a/gcc-4.2.1-5666.3/libiberty/strverscmp.c +++ /dev/null @@ -1,157 +0,0 @@ -/* Compare strings while treating digits characters numerically. - Copyright (C) 1997, 2002, 2005 Free Software Foundation, Inc. - This file is part of the libiberty library. - Contributed by Jean-François Bignolles <bignolle@ecoledoc.ibp.fr>, 1997. - - Libiberty is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - Libiberty is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - 02110-1301 USA. */ - -#include "libiberty.h" -#include "safe-ctype.h" - -/* -@deftypefun int strverscmp (const char *@var{s1}, const char *@var{s2}) -The @code{strverscmp} function compares the string @var{s1} against -@var{s2}, considering them as holding indices/version numbers. Return -value follows the same conventions as found in the @code{strverscmp} -function. In fact, if @var{s1} and @var{s2} contain no digits, -@code{strverscmp} behaves like @code{strcmp}. - -Basically, we compare strings normally (character by character), until -we find a digit in each string - then we enter a special comparison -mode, where each sequence of digits is taken as a whole. If we reach the -end of these two parts without noticing a difference, we return to the -standard comparison mode. There are two types of numeric parts: -"integral" and "fractional" (those begin with a '0'). The types -of the numeric parts affect the way we sort them: - -@itemize @bullet -@item -integral/integral: we compare values as you would expect. - -@item -fractional/integral: the fractional part is less than the integral one. -Again, no surprise. - -@item -fractional/fractional: the things become a bit more complex. -If the common prefix contains only leading zeroes, the longest part is less -than the other one; else the comparison behaves normally. -@end itemize - -@smallexample -strverscmp ("no digit", "no digit") - @result{} 0 // @r{same behavior as strcmp.} -strverscmp ("item#99", "item#100") - @result{} <0 // @r{same prefix, but 99 < 100.} -strverscmp ("alpha1", "alpha001") - @result{} >0 // @r{fractional part inferior to integral one.} -strverscmp ("part1_f012", "part1_f01") - @result{} >0 // @r{two fractional parts.} -strverscmp ("foo.009", "foo.0") - @result{} <0 // @r{idem, but with leading zeroes only.} -@end smallexample - -This function is especially useful when dealing with filename sorting, -because filenames frequently hold indices/version numbers. -@end deftypefun - -*/ - -/* states: S_N: normal, S_I: comparing integral part, S_F: comparing - fractional parts, S_Z: idem but with leading Zeroes only */ -#define S_N 0x0 -#define S_I 0x4 -#define S_F 0x8 -#define S_Z 0xC - -/* result_type: CMP: return diff; LEN: compare using len_diff/diff */ -#define CMP 2 -#define LEN 3 - - -/* Compare S1 and S2 as strings holding indices/version numbers, - returning less than, equal to or greater than zero if S1 is less than, - equal to or greater than S2 (for more info, see the Glibc texinfo doc). */ - -int -strverscmp (const char *s1, const char *s2) -{ - const unsigned char *p1 = (const unsigned char *) s1; - const unsigned char *p2 = (const unsigned char *) s2; - unsigned char c1, c2; - int state; - int diff; - - /* Symbol(s) 0 [1-9] others (padding) - Transition (10) 0 (01) d (00) x (11) - */ - static const unsigned int next_state[] = - { - /* state x d 0 - */ - /* S_N */ S_N, S_I, S_Z, S_N, - /* S_I */ S_N, S_I, S_I, S_I, - /* S_F */ S_N, S_F, S_F, S_F, - /* S_Z */ S_N, S_F, S_Z, S_Z - }; - - static const int result_type[] = - { - /* state x/x x/d x/0 x/- d/x d/d d/0 d/- - 0/x 0/d 0/0 0/- -/x -/d -/0 -/- */ - - /* S_N */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP, - CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP, - /* S_I */ CMP, -1, -1, CMP, +1, LEN, LEN, CMP, - +1, LEN, LEN, CMP, CMP, CMP, CMP, CMP, - /* S_F */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP, - CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP, - /* S_Z */ CMP, +1, +1, CMP, -1, CMP, CMP, CMP, - -1, CMP, CMP, CMP - }; - - if (p1 == p2) - return 0; - - c1 = *p1++; - c2 = *p2++; - /* Hint: '0' is a digit too. */ - state = S_N | ((c1 == '0') + (ISDIGIT (c1) != 0)); - - while ((diff = c1 - c2) == 0 && c1 != '\0') - { - state = next_state[state]; - c1 = *p1++; - c2 = *p2++; - state |= (c1 == '0') + (ISDIGIT (c1) != 0); - } - - state = result_type[state << 2 | (((c2 == '0') + (ISDIGIT (c2) != 0)))]; - - switch (state) - { - case CMP: - return diff; - - case LEN: - while (ISDIGIT (*p1++)) - if (!ISDIGIT (*p2++)) - return 1; - - return ISDIGIT (*p2) ? -1 : diff; - - default: - return state; - } -} |