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Diffstat (limited to 'lib/libalpm/rpmvercmp.c')
| -rw-r--r-- | lib/libalpm/rpmvercmp.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/lib/libalpm/rpmvercmp.c b/lib/libalpm/rpmvercmp.c new file mode 100644 index 00000000..bbabc2b4 --- /dev/null +++ b/lib/libalpm/rpmvercmp.c @@ -0,0 +1,237 @@ +/* + * rpmvercmp.c + * + * Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + * USA. + */ + +#include "config.h" +#include <stdio.h> +#include <ctype.h> +#include <string.h> +/* pacman */ +#include "rpmvercmp.h" + +/* this function was taken from rpm 4.0.4 and rewritten */ +int rpmvercmp(const char *a, const char *b) +{ + char *str1, *str2; + char *one, *two; + char *rel1 = NULL, *rel2 = NULL; + char oldch1, oldch2; + int is1num, is2num; + int rc; + + if(!strcmp(a,b)) { + return(0); + } + + str1 = strdup(a); + str2 = strdup(b); + + /* lose the release number */ + for(one = str1; *one && *one != '-'; one++); + if(one) { + *one = '\0'; + rel1 = ++one; + } + for(two = str2; *two && *two != '-'; two++); + if(two) { + *two = '\0'; + rel2 = ++two; + } + + one = str1; + two = str2; + + while(*one || *two) { + while(*one && !isalnum(*one)) one++; + while(*two && !isalnum(*two)) two++; + + str1 = one; + str2 = two; + + /* find the next segment for each string */ + if(isdigit(*str1)) { + is1num = 1; + while(*str1 && isdigit(*str1)) str1++; + } else { + is1num = 0; + while(*str1 && isalpha(*str1)) str1++; + } + if(isdigit(*str2)) { + is2num = 1; + while(*str2 && isdigit(*str2)) str2++; + } else { + is2num = 0; + while(*str2 && isalpha(*str2)) str2++; + } + + oldch1 = *str1; + *str1 = '\0'; + oldch2 = *str2; + *str2 = '\0'; + + /* see if we ran out of segments on one string */ + if(one == str1 && two != str2) { + return(is2num ? -1 : 1); + } + if(one != str1 && two == str2) { + return(is1num ? 1 : -1); + } + + /* see if we have a type mismatch (ie, one is alpha and one is digits) */ + if(is1num && !is2num) return(1); + if(!is1num && is2num) return(-1); + + if(is1num) while(*one == '0') one++; + if(is2num) while(*two == '0') two++; + + rc = strverscmp(one, two); + if(rc) return(rc); + + *str1 = oldch1; + *str2 = oldch2; + one = str1; + two = str2; + } + + if((!*one) && (!*two)) { + /* compare release numbers */ + if(rel1 && rel2) return(rpmvercmp(rel1, rel2)); + return(0); + } + + return(*one ? 1 : -1); +} + +#ifndef HAVE_STRVERSCMP + +/* 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. + + 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. */ + +/* states: S_N: normal, S_I: comparing integral part, S_F: comparing + fractionnal 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 texinfo doc). +*/ + +int strverscmp (s1, s2) + 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; + } +} + +#endif + +/* vim: set ts=2 sw=2 noet: */ |