1 /* 2 * Copyright (c) 1995 Wolfram Schneider <wosch@FreeBSD.org>. Berlin. 3 * Copyright (c) 1989, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * James A. Woods. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * $FreeBSD$ 38 */ 39 40 41 #ifndef _LOCATE_STATISTIC_ 42 #define _LOCATE_STATISTIC_ 43 44 void 45 statistic (fp, path_fcodes) 46 FILE *fp; /* open database */ 47 char *path_fcodes; /* for error message */ 48 { 49 register int lines, chars, size, big, zwerg; 50 register u_char *p, *s; 51 register int c; 52 int count, umlaut; 53 u_char bigram1[NBG], bigram2[NBG], path[MAXPATHLEN]; 54 55 for (c = 0, p = bigram1, s = bigram2; c < NBG; c++) { 56 p[c] = check_bigram_char(getc(fp)); 57 s[c] = check_bigram_char(getc(fp)); 58 } 59 60 lines = chars = big = zwerg = umlaut = 0; 61 size = NBG + NBG; 62 63 for (c = getc(fp), count = 0; c != EOF; size++) { 64 if (c == SWITCH) { 65 count += getwf(fp) - OFFSET; 66 size += sizeof(int); 67 zwerg++; 68 } else 69 count += c - OFFSET; 70 71 for (p = path + count; (c = getc(fp)) > SWITCH; size++) 72 if (c < PARITY) { 73 if (c == UMLAUT) { 74 c = getc(fp); 75 size++; 76 umlaut++; 77 } 78 p++; 79 } else { 80 /* bigram char */ 81 big++; 82 p += 2; 83 } 84 85 p++; 86 lines++; 87 chars += (p - path); 88 } 89 90 (void)printf("\nDatabase: %s\n", path_fcodes); 91 (void)printf("Compression: Front: %2.2f%%, ", 92 (size + big - (2 * NBG)) / (chars / (float)100)); 93 (void)printf("Bigram: %2.2f%%, ", (size - big) / (size / (float)100)); 94 (void)printf("Total: %2.2f%%\n", 95 (size - (2 * NBG)) / (chars / (float)100)); 96 (void)printf("Filenames: %d, ", lines); 97 (void)printf("Characters: %d, ", chars); 98 (void)printf("Database size: %d\n", size); 99 (void)printf("Bigram characters: %d, ", big); 100 (void)printf("Integers: %d, ", zwerg); 101 (void)printf("8-Bit characters: %d\n", umlaut); 102 103 } 104 #endif /* _LOCATE_STATISTIC_ */ 105 106 extern char separator; 107 108 void 109 #ifdef FF_MMAP 110 111 112 #ifdef FF_ICASE 113 fastfind_mmap_icase 114 #else 115 fastfind_mmap 116 #endif /* FF_ICASE */ 117 (pathpart, paddr, len, database) 118 char *pathpart; /* search string */ 119 caddr_t paddr; /* mmap pointer */ 120 int len; /* length of database */ 121 char *database; /* for error message */ 122 123 124 #else /* MMAP */ 125 126 127 #ifdef FF_ICASE 128 fastfind_icase 129 #else 130 fastfind 131 #endif /* FF_ICASE */ 132 133 (fp, pathpart, database) 134 FILE *fp; /* open database */ 135 char *pathpart; /* search string */ 136 char *database; /* for error message */ 137 138 139 #endif /* MMAP */ 140 141 { 142 register u_char *p, *s, *patend, *q, *foundchar; 143 register int c, cc; 144 int count, found, globflag; 145 u_char *cutoff; 146 u_char bigram1[NBG], bigram2[NBG], path[MAXPATHLEN]; 147 148 #ifdef FF_ICASE 149 /* use a lookup table for case insensitive search */ 150 u_char table[UCHAR_MAX + 1]; 151 152 tolower_word(pathpart); 153 #endif /* FF_ICASE*/ 154 155 /* init bigram table */ 156 #ifdef FF_MMAP 157 for (c = 0, p = bigram1, s = bigram2; c < NBG; c++, len-= 2) { 158 p[c] = check_bigram_char(*paddr++); 159 s[c] = check_bigram_char(*paddr++); 160 } 161 #else 162 for (c = 0, p = bigram1, s = bigram2; c < NBG; c++) { 163 p[c] = check_bigram_char(getc(fp)); 164 s[c] = check_bigram_char(getc(fp)); 165 } 166 #endif /* FF_MMAP */ 167 168 /* find optimal (last) char for searching */ 169 for (p = pathpart; *p != '\0'; p++) 170 if (strchr(LOCATE_REG, *p) != NULL) 171 break; 172 173 if (*p == '\0') 174 globflag = 0; 175 else 176 globflag = 1; 177 178 p = pathpart; 179 patend = patprep(p); 180 cc = *patend; 181 182 #ifdef FF_ICASE 183 /* set patend char to true */ 184 for (c = 0; c < UCHAR_MAX + 1; c++) 185 table[c] = 0; 186 187 table[TOLOWER(*patend)] = 1; 188 table[toupper(*patend)] = 1; 189 #endif /* FF_ICASE */ 190 191 192 /* main loop */ 193 found = count = 0; 194 foundchar = 0; 195 196 #ifdef FF_MMAP 197 c = (u_char)*paddr++; len--; 198 for (; len > 0; ) { 199 #else 200 c = getc(fp); 201 for (; c != EOF; ) { 202 #endif /* FF_MMAP */ 203 204 /* go forward or backward */ 205 if (c == SWITCH) { /* big step, an integer */ 206 #ifdef FF_MMAP 207 count += getwm(paddr) - OFFSET; 208 len -= INTSIZE; paddr += INTSIZE; 209 #else 210 count += getwf(fp) - OFFSET; 211 #endif /* FF_MMAP */ 212 } else { /* slow step, =< 14 chars */ 213 count += c - OFFSET; 214 } 215 216 if (count < 0 || count > MAXPATHLEN) 217 errx(1, "corrupted database: %s", database); 218 /* overlay old path */ 219 p = path + count; 220 foundchar = p - 1; 221 222 #ifdef FF_MMAP 223 for (; len > 0;) { 224 c = (u_char)*paddr++; 225 len--; 226 #else 227 for (;;) { 228 c = getc(fp); 229 #endif /* FF_MMAP */ 230 /* 231 * == UMLAUT: 8 bit char followed 232 * <= SWITCH: offset 233 * >= PARITY: bigram 234 * rest: single ascii char 235 * 236 * offset < SWITCH < UMLAUT < ascii < PARITY < bigram 237 */ 238 if (c < PARITY) { 239 if (c <= UMLAUT) { 240 if (c == UMLAUT) { 241 #ifdef FF_MMAP 242 c = (u_char)*paddr++; 243 len--; 244 #else 245 c = getc(fp); 246 #endif /* FF_MMAP */ 247 248 } else 249 break; /* SWITCH */ 250 } 251 #ifdef FF_ICASE 252 if (table[c]) 253 #else 254 if (c == cc) 255 #endif /* FF_ICASE */ 256 foundchar = p; 257 *p++ = c; 258 } 259 else { 260 /* bigrams are parity-marked */ 261 TO7BIT(c); 262 263 #ifndef FF_ICASE 264 if (bigram1[c] == cc || 265 bigram2[c] == cc) 266 #else 267 268 if (table[bigram1[c]] || 269 table[bigram2[c]]) 270 #endif /* FF_ICASE */ 271 foundchar = p + 1; 272 273 *p++ = bigram1[c]; 274 *p++ = bigram2[c]; 275 } 276 } 277 278 if (found) { /* previous line matched */ 279 cutoff = path; 280 *p-- = '\0'; 281 foundchar = p; 282 } else if (foundchar >= path + count) { /* a char matched */ 283 *p-- = '\0'; 284 cutoff = path + count; 285 } else /* nothing to do */ 286 continue; 287 288 found = 0; 289 for (s = foundchar; s >= cutoff; s--) { 290 if (*s == cc 291 #ifdef FF_ICASE 292 || TOLOWER(*s) == cc 293 #endif /* FF_ICASE */ 294 ) { /* fast first char check */ 295 for (p = patend - 1, q = s - 1; *p != '\0'; 296 p--, q--) 297 if (*q != *p 298 #ifdef FF_ICASE 299 && TOLOWER(*q) != *p 300 #endif /* FF_ICASE */ 301 ) 302 break; 303 if (*p == '\0') { /* fast match success */ 304 found = 1; 305 if (!globflag || 306 #ifndef FF_ICASE 307 !fnmatch(pathpart, path, 0)) 308 #else 309 !fnmatch(pathpart, path, 310 FNM_CASEFOLD)) 311 #endif /* !FF_ICASE */ 312 { 313 if (f_silent) 314 counter++; 315 else if (f_limit) { 316 counter++; 317 if (f_limit >= counter) 318 (void)printf("%s%c",path,separator); 319 else 320 errx(0, "[show only %d lines]", counter - 1); 321 } else 322 (void)printf("%s%c",path,separator); 323 } 324 break; 325 } 326 } 327 } 328 } 329 } 330