diff options
Diffstat (limited to 'lib/version.c')
| -rw-r--r-- | lib/version.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/lib/version.c b/lib/version.c new file mode 100644 index 0000000..624e089 --- /dev/null +++ b/lib/version.c @@ -0,0 +1,158 @@ +/* dctrl-tools - Debian control file inspection tools + Copyright © 2005 Antti-Juhani Kaijanaho + + 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 + */ + +// Marked portions of this file are covered by the following +// copyright: +/* + * libdpkg - Debian packaging suite library routines + * vercmp.c - comparison of version numbers + * utils.c - Helper functions for dpkg + * + * Copyright (C) 1995 Ian Jackson <ian@chiark.greenend.org.uk> + * Copyright (C) 2001 Wichert Akkerman <wakkerma@debian.org> + * + * This 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, + * or (at your option) any later version. + * + * This 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 dpkg; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <string.h> +#include "version.h" + +/* <<<<<<< originally from dpkg >>>>>>> */ + +/* Reimplementation of the standard ctype.h is* functions. Since gettext + * has overloaded the meaning of LC_CTYPE we can't use that to force C + * locale, so use these cis* functions instead. + */ +static int cisdigit(int c) { + return (c>='0') && (c<='9'); +} + +static int cisalpha(int c) { + return ((c>='a') && (c<='z')) || ((c>='A') && (c<='Z')); +} + +/* assume ascii; warning: evaluates x multiple times! */ +#define order(x) ((x) == '~' ? -1 \ + : cisdigit((x)) ? 0 \ + : !(x) ? 0 \ + : cisalpha((x)) ? (x) \ + : (x) + 256) + +static int verrevcmp(const char *val, const char *ref) { + if (!val) val= ""; + if (!ref) ref= ""; + + while (*val || *ref) { + int first_diff= 0; + + while ( (*val && !cisdigit(*val)) || (*ref && !cisdigit(*ref)) ) { + int vc= order(*val), rc= order(*ref); + if (vc != rc) return vc - rc; + val++; ref++; + } + + while ( *val == '0' ) val++; + while ( *ref == '0' ) ref++; + while (cisdigit(*val) && cisdigit(*ref)) { + if (!first_diff) first_diff= *val - *ref; + val++; ref++; + } + if (cisdigit(*val)) return 1; + if (cisdigit(*ref)) return -1; + if (first_diff) return first_diff; + } + return 0; +} + +int versioncompare(const struct versionrevision *version, + const struct versionrevision *refversion) { + int r; + + if (version->epoch > refversion->epoch) return 1; + if (version->epoch < refversion->epoch) return -1; + r= verrevcmp(version->version,refversion->version); if (r) return r; + return verrevcmp(version->revision,refversion->revision); +} + +/* <<<<<<< END OF originally from dpkg >>>>>>> */ + +/* warning: modifies ver by adding nul chars; return pointers point + * inside ver. */ +bool parse_version(struct versionrevision *rv, char *ver, size_t len) +{ + rv->version = strchr(ver, ':'); + if (rv->version == NULL) { + rv->version = ver; + } else { + *(rv->version++) = '\0'; + } + rv->revision = strrchr(ver, '-'); + + if (rv->revision == NULL) { + rv->revision = ver + len; + } else { + *(rv->revision++) = '\0'; + } + + if (rv->version != ver) { + rv->epoch = 0; + for (char *p = ver; *p != '\0'; p++) { + if (!('0' <= *p && *p <= '9')) return false; + rv->epoch = rv->epoch * 10 + (*p - '0'); + } + } else { + rv->epoch = 0; + } + + for (char *p = rv->version; *p != '\0'; p++) { + if (('a' <= *p && *p <= 'z') || + ('A' <= *p && *p <= 'Z') || + ('0' <= *p && *p <= '9') || + *p == '.' || + *p == '-' || + *p == '+' || + *p == ':' || + *p == '~') continue; + return false; + } + + for (char *p = rv->revision; *p != '\0'; p++) { + if (('a' <= *p && *p <= 'z') || + ('A' <= *p && *p <= 'Z') || + ('0' <= *p && *p <= '9') || + *p == '.' || + *p == '+' || + *p == '~') continue; + return false; + } + + return true; +} + |