Il mer, 2002-04-03 alle 14:58, MaX ha scritto: > ciao a tutti, > > ho bisogno di filtare un documento cosí formato: > > prodotto versione > aa 1 > aa 1.1 > bb 0.9.5 > bb 1 > bb 1.1 > > ecc. > > vorrei che venissero cancellate le linee contenenti la versione inferiore, > cioé che il risultato sia: > > prodotto versione > aa 1.1 > bb 1.1 > > avete alcune idee?
il problema di definire se una versione sia <> di un'altra e` un discreto casino. a meno di voler applicare questa mia patch[1] a sort, puoi usare dpkg --compare-versions (!) oppure scriverti uno script in perl/python/ruby/boh apposito. se invece di idee volevi del codice dillo che medito qualcosa... [1] usa un ordinamento secondo le regole di dpkg, sort --help per la sintassi, diff in attach. -- Federico Di Gregorio Debian GNU/Linux Developer & Italian Press Contact [EMAIL PROTECTED] INIT.D Developer [EMAIL PROTECTED] Best friends are often failed lovers. -- Me
80a81 > #define MAXVERSIONLENGTH 32 152a154 > int version; /* use dpkg-live version sorting */ 177a180,183 > /* Translation table from ASCII values to collate values for the dpkg-like > version sorting. */ > static int versiontab[256]; > 276a283 > -v compare according to dpkg-live version ordering\n\ 499a507,514 > for (i=0; i<256; i++) versiontab[i] = 0; > for (i='a'; i<='z'; i++) versiontab[i] = i; > for (i='A'; i<='Z'; i++) versiontab[i] = i; > versiontab['+'] = 256 + '+'; > versiontab['-'] = 256 + '-'; > versiontab['.'] = 256 + '.'; > versiontab[':'] = 256 + ':'; > 1083a1099,1162 > /* Compare strings A and B as dpkg-like versions */ > > static char * > _versioncompare_part (char *s, char *save, int max, int alpha) > { > int i; > > /* if *s is NUL, return NULL to signal end-of-string */ > if (!s || *s == '\0' || ISSPACE(*s)) return NULL; > > for (i=0; i<max ; i++) { > if (*s && ((alpha && versiontab[(unsigned int)*s] > 0) > || (!alpha && ISDIGIT(*s)))) { > s++; > } > else { > break; > } > } > *save = *s; > *s = '\0'; > return s; > } > > static int > versioncompare (register char *a, register char *b) > { > int res = 0, alpha = 0; > char sa, sb, *pa, *pb; > > while (*a || *b) { > pa = a; pb = b; > a = _versioncompare_part(a, &sa, MAXVERSIONLENGTH, alpha); > b = _versioncompare_part(b, &sb, MAXVERSIONLENGTH, alpha); > if (a && b) { > if (alpha) { > while (*pa && *pb > && versiontab[(unsigned int)*pa] > 0 > && versiontab[(unsigned int)*pb] > 0) { > if (*pa != *pb) break; > pa++; pb++; > } > res = versiontab[(unsigned int)*pb] - versiontab[(unsigned int)*pa]; > } > else { > res = atoi(pb) - atoi(pa); > } > > } > else if (a) res = -1; > else if (b) res = 1; > else res = 1000; /* very dirty trick */ > > if (a) *a = sa; > if (b) *b = sb; > > if (res != 0) return (res == 1000 ? 0 : -res); > > alpha = (alpha-1)*-1; > } > > return -res; > } > 1151c1230 < if (key->numeric | key->general_numeric) --- > if (key->numeric | key->general_numeric | key->version) 1167,1168c1246,1250 < diff = ((key->numeric ? numcompare : general_numcompare) < (texta, textb)); --- > if (key->version) > diff = versioncompare (texta, textb); > else > diff = ((key->numeric ? numcompare : general_numcompare) > (texta, textb)); 1874a1957,1959 > case 'v': > key->version = 1; > break; 1983a2069 > gkey.version = 0; 2242c2328 < && !key->skipeblanks && !key->month && !key->numeric --- > && !key->skipeblanks && !key->month && !key->numeric && !key->version 2250a2337 > key->version = gkey.version; 2257c2344 < || gkey.general_numeric)) --- > || gkey.version || gkey.general_numeric))
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