diff options
Diffstat (limited to 'libc/string/generic/strverscmp.c')
| -rw-r--r-- | libc/string/generic/strverscmp.c | 117 |
1 files changed, 0 insertions, 117 deletions
diff --git a/libc/string/generic/strverscmp.c b/libc/string/generic/strverscmp.c deleted file mode 100644 index 74ae4c6ad..000000000 --- a/libc/string/generic/strverscmp.c +++ /dev/null @@ -1,117 +0,0 @@ -/* GNU's strverscmp() function, taken from glibc 2.3.2 sources - */ - -/* Compare strings while treating digits characters numerically. - Copyright (C) 1997, 2002 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Jean-François Bignolles <bignolle@ecoledoc.ibp.fr>, 1997. - - Derived work for uClibc by Hai Zaar, Codefidence Ltd <haizaar@codefidence.com> - - The GNU C Library 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. - - The GNU C Library 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., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <string.h> -#include <ctype.h> -#include <stdint.h> - - -/* 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 - -/* using more efficient isdigit() */ -#undef isdigit -#define isdigit(a) ((unsigned)((a) - '0') <= 9) - -/* 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 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 uint8_t 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 int8_t 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; - } -} |