1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830
|
/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
*/
/*
* Code to handle tags and the tag stack
*/
#if defined MSDOS || defined WIN32
# include <io.h> /* for lseek(), must be before vim.h */
#endif
#include "vim.h"
#ifdef HAVE_FCNTL_H
# include <fcntl.h> /* for lseek() */
#endif
struct tag_pointers
{
/* filled in by parse_tag_line(): */
char_u *tagname; /* start of tag name (skip "file:") */
char_u *tagname_end; /* char after tag name */
char_u *fname; /* first char of file name */
char_u *fname_end; /* char after file name */
char_u *command; /* first char of command */
/* filled in by parse_match(): */
char_u *command_end; /* first char of command */
char_u *tag_fname; /* file name of the tags file */
#ifdef EMACS_TAGS
int is_etag; /* TRUE for emacs tag */
#endif
char_u *tagkind; /* "kind:" value */
char_u *tagkind_end; /* end of tagkind */
};
/*
* The matching tags are first stored in ga_match[]. In which one depends on
* the priority of the match.
* At the end, the matches from ga_match[] are concatenated, to make a list
* sorted on priority.
*/
#define MT_ST_CUR 0 /* static match in current file */
#define MT_GL_CUR 1 /* global match in current file */
#define MT_GL_OTH 2 /* global match in other file */
#define MT_ST_OTH 3 /* static match in other file */
#define MT_IC_ST_CUR 4 /* icase static match in current file */
#define MT_IC_GL_CUR 5 /* icase global match in current file */
#define MT_IC_GL_OTH 6 /* icase global match in other file */
#define MT_IC_ST_OTH 7 /* icase static match in other file */
#define MT_IC_OFF 4 /* add for icase match */
#define MT_RE_OFF 8 /* add for regexp match */
#define MT_MASK 7 /* mask for printing priority */
#define MT_COUNT 16
static char *mt_names[MT_COUNT/2] =
{"FSC", "F C", "F ", "FS ", " SC", " C", " ", " S "};
#define NOTAGFILE 99 /* return value for jumpto_tag */
static char_u *nofile_fname = NULL; /* fname for NOTAGFILE error */
static void taglen_advance __ARGS((int l));
static int get_tagfname __ARGS((int first, char_u *buf));
static int jumpto_tag __ARGS((char_u *lbuf, int forceit));
#ifdef EMACS_TAGS
static int parse_tag_line __ARGS((char_u *lbuf, int is_etag, struct tag_pointers *tagp));
#else
static int parse_tag_line __ARGS((char_u *lbuf, struct tag_pointers *tagp));
#endif
static int test_for_static __ARGS((struct tag_pointers *));
static int parse_match __ARGS((char_u *lbuf, struct tag_pointers *tagp));
static char_u *tag_full_fname __ARGS((struct tag_pointers *tagp));
static char_u *expand_tag_fname __ARGS((char_u *fname, char_u *tag_fname, int expand));
#ifdef EMACS_TAGS
static int test_for_current __ARGS((int, char_u *, char_u *, char_u *));
#else
static int test_for_current __ARGS((char_u *, char_u *, char_u *));
#endif
static int find_extra __ARGS((char_u **pp));
static char_u *bottommsg = (char_u *)"at bottom of tag stack";
static char_u *topmsg = (char_u *)"at top of tag stack";
/*
* We use ftello() here, if available. It returns off_t instead of long,
* which helps if long is 32 bit and off_t is 64 bit.
*/
#ifdef HAVE_FTELLO
# define ftell ftello
#endif
/*
* Jump to tag; handling of tag commands and tag stack
*
* *tag != NUL: ":tag {tag}", jump to new tag, add to tag stack
*
* type == DT_TAG: ":tag [tag]", jump to newer position or same tag again
* type == DT_HELP: like DT_TAG, but don't use regexp.
* type == DT_POP: ":pop" or CTRL-T, jump to old position
* type == DT_NEXT: jump to next match of same tag
* type == DT_PREV: jump to previous match of same tag
* type == DT_FIRST: jump to first match of same tag
* type == DT_LAST: jump to last match of same tag
* type == DT_SELECT: ":tselect [tag]", select tag from a list of all matches
* type == DT_JUMP: ":tjump [tag]", jump to tag or select tag from a list
*
* for cscope, returns TRUE if we jumped to tag or aborted, FALSE otherwise
*/
int
do_tag(tag, type, count, forceit, verbose)
char_u *tag; /* tag (pattern) to jump to */
int type;
int count;
int forceit; /* :ta with ! */
int verbose; /* print "tag not found" message */
{
struct taggy *tagstack = curwin->w_tagstack;
int tagstackidx = curwin->w_tagstackidx;
int tagstacklen = curwin->w_tagstacklen;
int cur_match = 0;
int oldtagstackidx = tagstackidx;
int prev_num_matches;
int new_tag = FALSE;
int other_name;
int i, j, k;
int idx;
int ic;
char_u *p;
char_u *name;
int no_regexp = FALSE;
int error_cur_match = 0;
char_u *command_end;
int save_pos = FALSE;
struct filemark saved_fmark;
int taglen;
#ifdef USE_CSCOPE
int jumped_to_tag = FALSE;
#endif
struct tag_pointers tagp, tagp2;
int new_num_matches;
char_u **new_matches;
int attr;
int use_tagstack;
int skip_msg = FALSE;
/* remember the matches for the last used tag */
static int num_matches = 0;
static int max_num_matches = 0; /* limit used for match search */
static char_u **matches = NULL;
static int flags;
static char_u *matchname = NULL;
if (type == DT_HELP)
{
type = DT_TAG;
no_regexp = TRUE;
}
prev_num_matches = num_matches;
nofile_fname = NULL;
/*
* Don't add a tag to the tagstack if 'tagstack' has been reset.
*/
if (!p_tgst && *tag)
{
use_tagstack = FALSE;
}
else
{
use_tagstack = TRUE;
/* new pattern, add to the tag stack */
if (*tag && (type == DT_TAG || type == DT_SELECT || type == DT_JUMP
#ifdef USE_CSCOPE
|| type == DT_CSCOPE
#endif
))
{
/*
* If the last used entry is not at the top, delete all tag stack
* entries above it.
*/
while (tagstackidx < tagstacklen)
vim_free(tagstack[--tagstacklen].tagname);
/* if the tagstack is full: remove oldest entry */
if (++tagstacklen > TAGSTACKSIZE)
{
tagstacklen = TAGSTACKSIZE;
vim_free(tagstack[0].tagname);
for (i = 1; i < tagstacklen; ++i)
tagstack[i - 1] = tagstack[i];
--tagstackidx;
}
/*
* put the tag name in the tag stack
*/
if ((tagstack[tagstackidx].tagname = vim_strsave(tag)) == NULL)
{
curwin->w_tagstacklen = tagstacklen - 1;
goto end_do_tag;
}
curwin->w_tagstacklen = tagstacklen;
new_tag = TRUE;
save_pos = TRUE; /* save the cursor position below */
}
else
{
if (tagstacklen == 0) /* empty stack */
{
EMSG(e_tagstack);
goto end_do_tag;
}
if (type == DT_POP) /* go to older position */
{
if ((tagstackidx -= count) < 0)
{
emsg(bottommsg);
if (tagstackidx + count == 0)
{
/* We did [num]^T from the bottom of the stack */
tagstackidx = 0;
goto end_do_tag;
}
/* We weren't at the bottom of the stack, so jump all the
* way to the bottom now.
*/
tagstackidx = 0;
}
else if (tagstackidx >= tagstacklen) /* count == 0? */
{
emsg(topmsg);
goto end_do_tag;
}
/* Make a copy of the fmark, autocommands may invalidate the
* tagstack before it's used. */
saved_fmark = tagstack[tagstackidx].fmark;
if (saved_fmark.fnum != curbuf->b_fnum)
{
/*
* Jump to other file. If this fails (e.g. because the
* file was changed) keep original position in tag stack.
*/
if (buflist_getfile(saved_fmark.fnum, saved_fmark.mark.lnum,
GETF_SETMARK, forceit) == FAIL)
{
tagstackidx = oldtagstackidx; /* back to old posn */
goto end_do_tag;
}
}
else
curwin->w_cursor.lnum = saved_fmark.mark.lnum;
curwin->w_cursor.col = saved_fmark.mark.col;
curwin->w_set_curswant = TRUE;
adjust_cursor();
/* remove the old list of matches */
FreeWild(num_matches, matches);
#ifdef USE_CSCOPE
cs_free_tags();
#endif
num_matches = 0;
goto end_do_tag;
}
if (type == DT_TAG) /* go to newer pattern */
{
save_pos = TRUE; /* save the cursor position below */
if ((tagstackidx += count - 1) >= tagstacklen)
{
/*
* Beyond the last one, just give an error message and go to
* the last one. Don't store the cursor postition.
*/
tagstackidx = tagstacklen - 1;
emsg(topmsg);
save_pos = FALSE;
}
else if (tagstackidx < 0) /* must have been count == 0 */
{
emsg(bottommsg);
tagstackidx = 0;
goto end_do_tag;
}
cur_match = tagstack[tagstackidx].cur_match;
new_tag = TRUE;
}
else /* go to other matching tag */
{
if (--tagstackidx < 0)
tagstackidx = 0;
cur_match = tagstack[tagstackidx].cur_match;
switch (type)
{
case DT_FIRST: cur_match = count - 1; break;
case DT_SELECT:
case DT_JUMP:
#ifdef USE_CSCOPE
case DT_CSCOPE:
#endif
case DT_LAST: cur_match = MAXCOL - 1; break;
case DT_NEXT: cur_match += count; break;
case DT_PREV: cur_match -= count; break;
}
if (cur_match >= MAXCOL)
cur_match = MAXCOL - 1;
else if (cur_match < 0)
{
EMSG("Cannot go before first matching tag");
skip_msg = TRUE;
cur_match = 0;
}
}
}
/*
* For ":tag [arg]" or ":tselect" remember position before the jump.
*/
saved_fmark = tagstack[tagstackidx].fmark;
if (save_pos)
{
tagstack[tagstackidx].fmark.mark = curwin->w_cursor;
tagstack[tagstackidx].fmark.fnum = curbuf->b_fnum;
}
/* Curwin will change in the call to jumpto_tag() if ":stag" was used
* or an autocommand jumps to another window; store value of
* tagstackidx now. */
curwin->w_tagstackidx = tagstackidx;
if (type != DT_SELECT && type != DT_JUMP)
curwin->w_tagstack[tagstackidx].cur_match = cur_match;
}
/*
* Repeat searching for tags, when a file has not been found.
*/
for (;;)
{
/*
* When desired match not found yet, try to find it (and others).
*/
if (!use_tagstack)
name = tag;
else
name = tagstack[tagstackidx].tagname;
other_name = (matchname == NULL || STRCMP(matchname, name) != 0);
if (new_tag
|| (cur_match >= num_matches && max_num_matches != MAXCOL)
|| other_name)
{
if (other_name)
{
vim_free(matchname);
matchname = vim_strsave(name);
}
if (type == DT_SELECT || type == DT_JUMP)
cur_match = MAXCOL - 1;
max_num_matches = cur_match + 1;
/* when the argument starts with '/', use it as a regexp */
if (!no_regexp && *name == '/')
{
flags = TAG_REGEXP;
++name;
}
else
flags = TAG_NOIC;
#ifdef USE_CSCOPE
if (type == DT_CSCOPE)
flags = TAG_CSCOPE;
#endif
if (verbose)
flags |= TAG_VERBOSE;
if (find_tags(name, &new_num_matches, &new_matches, flags,
max_num_matches) == OK
&& new_num_matches < max_num_matches)
max_num_matches = MAXCOL; /* If less than max_num_matches
found: all matches found. */
/* If there already were some matches for the same name, move them
* to the start. Avoids that the order changes when using
* ":tnext" and jumping to another file. */
if (!new_tag && !other_name)
{
/* Find the position of each old match in the new list. Need
* to use parse_match() to find the tag line. */
idx = 0;
for (j = 0; j < num_matches; ++j)
{
parse_match(matches[j], &tagp);
for (i = idx; i < new_num_matches; ++i)
{
parse_match(new_matches[i], &tagp2);
if (STRCMP(tagp.tagname, tagp2.tagname) == 0)
{
p = new_matches[i];
for (k = i; k > idx; --k)
new_matches[k] = new_matches[k - 1];
new_matches[idx++] = p;
break;
}
}
}
}
FreeWild(num_matches, matches);
num_matches = new_num_matches;
matches = new_matches;
}
if (num_matches <= 0)
{
if (verbose)
EMSG("tag not found");
g_do_tagpreview = 0;
}
else
{
int ask_for_selection = FALSE;
#ifdef USE_CSCOPE
if (type == DT_CSCOPE && num_matches > 1)
{
cs_print_tags();
ask_for_selection = TRUE;
}
else
#endif
if (type == DT_SELECT || (type == DT_JUMP && num_matches > 1))
{
/*
* List all the matching tags.
* Assume that the first match indicates how long the tags can
* be, and align the file names to that.
*/
parse_match(matches[0], &tagp);
taglen = tagp.tagname_end - tagp.tagname + 2;
if (taglen < 18)
taglen = 18;
if (taglen > Columns - 25)
taglen = MAXCOL;
MSG_PUTS_ATTR(" # pri kind tag", hl_attr(HLF_T));
msg_clr_eos();
taglen_advance(taglen);
MSG_PUTS_ATTR("file\n", hl_attr(HLF_T));
for (i = 0; i < num_matches; ++i)
{
parse_match(matches[i], &tagp);
if (!new_tag && use_tagstack
&& i == tagstack[tagstackidx].cur_match)
*IObuff = '>';
else
*IObuff = ' ';
sprintf((char *)IObuff + 1, "%2d %s ", i + 1,
mt_names[matches[i][0] & MT_MASK]);
msg_puts(IObuff);
if (tagp.tagkind != NULL)
msg_outtrans_len(tagp.tagkind,
(int)(tagp.tagkind_end - tagp.tagkind));
msg_advance(13);
msg_outtrans_len_attr(tagp.tagname,
(int)(tagp.tagname_end - tagp.tagname),
hl_attr(HLF_T));
msg_putchar(' ');
taglen_advance(taglen);
/* Find out the actual file name. If it is long, truncate
* it and put "..." in the middle */
p = tag_full_fname(&tagp);
if (p != NULL)
{
msg_puts_long_attr(p, hl_attr(HLF_D));
vim_free(p);
}
if (msg_col > 0)
msg_putchar('\n');
msg_advance(15);
/* print any extra fields */
command_end = tagp.command_end;
if (command_end != NULL)
{
p = command_end + 3;
while (*p && *p != '\r' && *p != '\n')
{
while (*p == TAB)
++p;
/* skip "file:" without a value (static tag) */
if (STRNCMP(p, "file:", 5) == 0
&& vim_isspace(p[5]))
{
p += 5;
continue;
}
/* skip "kind:<kind>" and "<kind>" */
if (p == tagp.tagkind
|| (p + 5 == tagp.tagkind
&& STRNCMP(p, "kind:", 5) == 0))
{
p = tagp.tagkind_end;
continue;
}
/* print all other extra fields */
attr = hl_attr(HLF_CM);
while (*p && *p != '\r' && *p != '\n')
{
if (msg_col + charsize(*p) >= Columns)
{
msg_putchar('\n');
msg_advance(15);
}
msg_puts_attr(transchar(*p), attr);
++p;
if (*p == TAB)
{
msg_puts_attr((char_u *)" ", attr);
break;
}
if (*p == ':')
attr = 0;
}
}
if (msg_col > 15)
{
msg_putchar('\n');
msg_advance(15);
}
}
else
{
for (p = tagp.command;
*p && *p != '\r' && *p != '\n'; ++p)
;
command_end = p;
}
/*
* Put the info (in several lines) at column 15.
* Don't display "/^" and "?^".
*/
p = tagp.command;
if (*p == '/' || *p == '?')
{
++p;
if (*p == '^')
++p;
}
/* Remove leading whitespace from pattern */
while (p != command_end && vim_isspace(*p))
++p;
while (p != command_end)
{
if (msg_col + (*p == TAB ? 1 : charsize(*p)) > Columns)
msg_putchar('\n');
msg_advance(15);
/* skip backslash used for escaping command char */
if (*p == '\\' && *(p + 1) == *tagp.command)
++p;
if (*p == TAB)
msg_putchar(' ');
else
msg_puts(transchar(*p));
++p;
/* don't display the "$/;\"" and "$?;\"" */
if (p == command_end - 2 && *p == '$'
&& *(p + 1) == *tagp.command)
break;
/* don't display matching '/' or '?' */
if (p == command_end - 1 && *p == *tagp.command
&& (*p == '/' || *p == '?'))
break;
}
if (msg_col)
msg_putchar('\n');
ui_breakcheck();
if (got_int)
{
got_int = FALSE; /* only stop the listing */
break;
}
}
ask_for_selection = TRUE;
}
if (ask_for_selection == TRUE)
{
/*
* Ask to select a tag from the list.
*/
MSG_PUTS("Enter nr of choice (<CR> to abort): ");
i = get_number(TRUE);
if (KeyTyped) /* don't call wait_return() now */
{
msg_putchar('\n');
cmdline_row = msg_row - 1;
need_wait_return = FALSE;
msg_didany = FALSE;
}
if (i <= 0 || i > num_matches || got_int)
{
/* no valid choice: don't change anything */
if (use_tagstack)
{
tagstack[tagstackidx].fmark = saved_fmark;
++tagstackidx;
}
#ifdef USE_CSCOPE
cs_free_tags();
jumped_to_tag = TRUE;
#endif
break;
}
/* avoid the need to hit <CR> when jumping to another file */
msg_scrolled = 0;
redraw_all_later(NOT_VALID);
cur_match = i - 1;
}
if (cur_match >= num_matches)
{
if (type == DT_NEXT || type == DT_FIRST)
{
if (num_matches == 1)
EMSG("There is only one matching tag");
else
EMSG("Cannot go beyond last matching tag");
skip_msg = TRUE;
}
cur_match = num_matches - 1;
}
if (use_tagstack)
{
tagstack[tagstackidx].cur_match = cur_match;
++tagstackidx;
}
/*
* Only when going to try the next match, report that the previous
* file didn't exist. Otherwise an EMSG() is given below.
*/
if (nofile_fname != NULL && error_cur_match != cur_match)
smsg((char_u *)"File \"%s\" does not exist", nofile_fname);
ic = (matches[cur_match][0] & MT_IC_OFF);
if (type != DT_SELECT && type != DT_JUMP
#ifdef USE_CSCOPE
&& type != DT_CSCOPE
#endif
&& (num_matches > 1 || ic)
&& !skip_msg)
{
/* Give an indication of the number of matching tags */
sprintf((char *)msg_buf, "tag %d of %d%s",
cur_match + 1,
num_matches,
max_num_matches != MAXCOL ? " or more" : "");
if (ic)
STRCAT(msg_buf, " Using tag with different case!");
if ((num_matches > prev_num_matches || new_tag)
&& num_matches > 1)
{
if (ic)
msg_attr(msg_buf, hl_attr(HLF_W));
else
msg(msg_buf);
msg_scroll = TRUE; /* don't overwrite this message */
}
else
give_warning(msg_buf, ic);
if (ic && !msg_scrolled)
{
out_flush();
ui_delay(1000L, TRUE);
}
}
/*
* Jump to the desired match.
*/
if (jumpto_tag(matches[cur_match], forceit) == NOTAGFILE)
{
/* File not found: try again with another matching tag */
if ((type == DT_PREV && cur_match > 0)
|| ((type == DT_TAG || type == DT_NEXT
|| type == DT_FIRST)
&& (max_num_matches != MAXCOL
|| cur_match < num_matches - 1)))
{
error_cur_match = cur_match;
if (use_tagstack)
--tagstackidx;
if (type == DT_PREV)
--cur_match;
else
{
type = DT_NEXT;
++cur_match;
}
continue;
}
EMSG2("File \"%s\" does not exist", nofile_fname);
}
else
{
/* We may have jumped to another window, check that
* tagstackidx is still valid. */
if (tagstackidx > curwin->w_tagstacklen)
tagstackidx = curwin->w_tagstackidx;
#ifdef USE_CSCOPE
jumped_to_tag = TRUE;
#endif
}
}
break;
}
end_do_tag:
/* Only store the new index when using tha tagstack and it's valid. */
if (use_tagstack && tagstackidx <= curwin->w_tagstacklen)
curwin->w_tagstackidx = tagstackidx;
postponed_split = 0; /* don't split next time */
#ifdef USE_CSCOPE
return jumped_to_tag;
#else
return FALSE;
#endif
}
static void
taglen_advance(l)
int l;
{
if (l == MAXCOL)
{
msg_putchar('\n');
msg_advance(24);
}
else
msg_advance(13 + l);
}
/*
* Print the tag stack
*/
void
do_tags()
{
int i;
char_u *name;
struct taggy *tagstack = curwin->w_tagstack;
int tagstackidx = curwin->w_tagstackidx;
int tagstacklen = curwin->w_tagstacklen;
/* Highlight title */
MSG_PUTS_TITLE("\n # TO tag FROM line in file/text");
for (i = 0; i < tagstacklen; ++i)
{
if (tagstack[i].tagname != NULL)
{
name = fm_getname(&(tagstack[i].fmark), 30);
if (name == NULL) /* file name not available */
continue;
msg_putchar('\n');
sprintf((char *)IObuff, "%c%2d %2d %-15s %5ld ",
i == tagstackidx ? '>' : ' ',
i + 1,
tagstack[i].cur_match + 1,
tagstack[i].tagname,
tagstack[i].fmark.mark.lnum);
msg_outtrans(IObuff);
msg_outtrans_attr(name, tagstack[i].fmark.fnum == curbuf->b_fnum
? hl_attr(HLF_D) : 0);
vim_free(name);
}
out_flush(); /* show one line at a time */
}
if (tagstackidx == tagstacklen) /* idx at top of stack */
MSG_PUTS("\n>");
}
/*
* find_tags() - search for tags in tags files
*
* Return FAIL if search completely failed (*num_matches will be 0, *matchesp
* will be NULL), OK otherwise.
*
* There is a priority in which type of tag is recognized.
*
* 6. A static or global tag with a full matching tag for the current file.
* 5. A global tag with a full matching tag for another file.
* 4. A static tag with a full matching tag for another file.
* 3. A static or global tag with an ignore-case matching tag for the
* current file.
* 2. A global tag with an ignore-case matching tag for another file.
* 1. A static tag with an ignore-case matching tag for another file.
*
* Tags in an emacs-style tags file are always global.
*
* flags:
* TAG_HELP only search for help tags
* TAG_NAMES only return name of tag
* TAG_REGEXP use "pat" as a regexp
* TAG_NOIC don't always ignore case
*/
int
find_tags(pat, num_matches, matchesp, flags, mincount)
char_u *pat; /* pattern to search for */
int *num_matches; /* return: number of matches found */
char_u ***matchesp; /* return: array of matches found */
int flags;
int mincount; /* MAXCOL: find all matches
other: minimal number of matches */
{
FILE *fp;
char_u *lbuf; /* line buffer */
char_u *tag_fname; /* name of tag file */
int first_file; /* trying first tag file */
struct tag_pointers tagp;
int did_open = FALSE; /* did open a tag file */
int stop_searching = FALSE; /* stop when match found or error */
int retval = FAIL; /* return value */
int is_static; /* current tag line is static */
int is_current; /* file name matches */
int eof = FALSE; /* found end-of-file */
char_u *p;
char_u *s;
int i;
vim_regexp *prog = NULL; /* regexp program or NULL */
#ifdef BINARY_TAGS
struct tag_search_info /* Binary search file offsets */
{
off_t low_offset; /* offset for first char of first line that
could match */
off_t high_offset; /* offset of char after last line that could
match */
off_t curr_offset; /* Current file offset in search range */
off_t match_offset; /* Where the binary search found a tag */
int low_char; /* first char at low_offset */
int high_char; /* first char at high_offset */
} search_info;
off_t filesize;
int tagcmp;
off_t offset;
#endif
enum
{
TS_START, /* at start of file */
TS_LINEAR /* linear searching forward, till EOF */
#ifdef BINARY_TAGS
, TS_BINARY, /* binary searching */
TS_SKIP_BACK, /* skipping backwards */
TS_STEP_FORWARD /* stepping forwards */
#endif
} state; /* Current search state */
int cmplen;
int match; /* matches */
int match_no_ic = 0;/* matches with reg_ic == FALSE */
int match_re; /* match with regexp */
int matchoff = 0;
#ifdef EMACS_TAGS
/*
* Stack for included emacs-tags file.
* It has a fixed size, to truncate cyclic includes. jw
*/
# define INCSTACK_SIZE 42
struct
{
FILE *fp;
char_u *etag_fname;
} incstack[INCSTACK_SIZE];
int incstack_idx = 0; /* index in incstack */
char_u *ebuf; /* aditional buffer for etag fname */
int is_etag; /* current file is emaces style */
#endif
struct growarray ga_match[MT_COUNT];
int match_count = 0; /* number of matches found */
char_u **matches;
int mtt;
int len;
int help_save;
int patlen; /* length of pat[] */
char_u *pathead; /* start of pattern head */
int patheadlen; /* length of pathead[] */
#ifdef BINARY_TAGS
int findall = (mincount == MAXCOL || mincount == TAG_MANY);
/* find all matching tags */
int sort_error = FALSE; /* tags file not sorted */
int linear; /* do a linear search */
#endif
int has_re = (flags & TAG_REGEXP); /* regexp used */
int help_only = (flags & TAG_HELP);
int name_only = (flags & TAG_NAMES);
int noic = (flags & TAG_NOIC);
int get_it_again = FALSE;
#ifdef USE_CSCOPE
int use_cscope = (flags & TAG_CSCOPE);
#endif
int verbose = (flags & TAG_VERBOSE);
help_save = curbuf->b_help;
/*
* Allocate memory for the buffers that are used
*/
if (has_re)
prog = vim_regcomp(pat, p_magic);
lbuf = alloc(LSIZE);
tag_fname = alloc(LSIZE + 1);
#ifdef EMACS_TAGS
ebuf = alloc(LSIZE);
#endif
for (mtt = 0; mtt < MT_COUNT; ++mtt)
{
ga_init2(&ga_match[mtt], (int)sizeof(char_u *), 100);
}
/* check for out of memory situation */
if (lbuf == NULL || tag_fname == NULL
#ifdef EMACS_TAGS
|| ebuf == NULL
#endif
)
goto findtag_end;
/*
* Initialize a few variables
*/
if (help_only) /* want tags from help file */
curbuf->b_help = TRUE; /* will be restored later */
patlen = STRLEN(pat);
if (p_tl != 0 && patlen > p_tl) /* adjust for 'taglength' */
patlen = p_tl;
pathead = pat;
patheadlen = patlen;
if (has_re)
{
/* When the pattern starts with '^' or "\\<", binary searching can be
* used (much faster). */
if (pat[0] == '^')
pathead = pat + 1;
else if (pat[0] == '\\' && pat[1] == '<')
pathead = pat + 2;
if (pathead == pat)
patheadlen = 0;
else
for (patheadlen = 0; pathead[patheadlen] != NUL; ++patheadlen)
if (vim_strchr((char_u *)(p_magic ? ".[~*\\$" : "\\$"),
pathead[patheadlen]) != NULL)
break;
if (p_tl != 0 && patheadlen > p_tl) /* adjust for 'taglength' */
patheadlen = p_tl;
}
/*
* When finding a specified number of matches, first try with matching case,
* so binary search can be used, and try ignore-case matches in a second loop.
* When finding all matches, 'tagbsearch' is off, or there is no fixed string
* to look for, ignore case right away to avoid going though the tags files
* twice.
* Only ignore case when TAG_NOIC not used or 'ignorecase' set.
*/
#ifdef BINARY_TAGS
reg_ic = ((p_ic || !noic) && (findall || patheadlen == 0 || !p_tbs));
for (;;)
{
linear = (reg_ic || patheadlen == 0 || !p_tbs);
#else
reg_ic = (p_ic || !noic);
#endif
#if 0 /* debug message about binary or linear search */
if (linear)
MSG("Linear tag search");
else
MSG("Binary tag search");
ui_delay(2000, TRUE);
MSG("");
#endif
/*
* Try tag file names from tags option one by one.
*/
for (first_file = TRUE;
#ifdef USE_CSCOPE
use_cscope ||
#endif
get_tagfname(first_file, tag_fname) == OK; first_file = FALSE)
{
/*
* A file that doesn't exist is silently ignored. Only when not a
* single file is found, an error message is given (further on).
*/
#ifdef USE_CSCOPE
if (use_cscope)
fp = NULL; /* avoid GCC warning */
else
#endif
if ((fp = mch_fopen((char *)tag_fname, "r")) == NULL)
continue;
did_open = TRUE; /* remember that we found at least one file */
state = TS_START; /* we're at the start of the file */
#ifdef EMACS_TAGS
is_etag = 0; /* default is: not emacs style */
#endif
/*
* Read and parse the lines in the file one by one
*/
for (;;)
{
line_breakcheck(); /* check for CTRL-C typed */
#ifdef INSERT_EXPAND
if ((flags & TAG_INS_COMP)) /* Double brackets for gcc */
ins_compl_check_keys();
if (got_int || completion_interrupted)
#else
if (got_int)
#endif
{
stop_searching = TRUE;
break;
}
/* When mincount is TAG_MANY, stop when enough matches have been
* found (for completion). */
if (mincount == TAG_MANY && match_count >= TAG_MANY)
{
stop_searching = TRUE;
retval = OK;
break;
}
if (get_it_again)
goto line_read_in;
#ifdef BINARY_TAGS
/*
* For binary search: compute the next offset to use.
*/
if (state == TS_BINARY)
{
offset = search_info.low_offset + ((search_info.high_offset
- search_info.low_offset) / 2);
if (offset == search_info.curr_offset)
break; /* End the binary search without a match. */
else
search_info.curr_offset = offset;
}
/*
* Skipping back (after a match during binary search).
*/
else if (state == TS_SKIP_BACK)
{
search_info.curr_offset -= LSIZE * 2;
if (search_info.curr_offset < 0)
{
search_info.curr_offset = 0;
rewind(fp);
state = TS_STEP_FORWARD;
}
}
/*
* When jumping around in the file, first read a line to find the
* start of the next line.
*/
if (state == TS_BINARY || state == TS_SKIP_BACK)
{
/* Adjust the search file offset to the correct position */
#ifdef HAVE_FSEEKO
fseeko(fp, search_info.curr_offset, SEEK_SET);
#else
fseek(fp, (long)search_info.curr_offset, SEEK_SET);
#endif
eof = vim_fgets(lbuf, LSIZE, fp);
if (!eof && search_info.curr_offset != 0)
{
search_info.curr_offset = ftell(fp);
if (search_info.curr_offset == search_info.high_offset)
{
/* oops, gone a bit too far; try from low offset */
#ifdef HAVE_FSEEKO
fseeko(fp, search_info.low_offset, SEEK_SET);
#else
fseek(fp, (long)search_info.low_offset, SEEK_SET);
#endif
search_info.curr_offset = search_info.low_offset;
}
eof = vim_fgets(lbuf, LSIZE, fp);
}
/* skip empty and blank lines */
while (!eof && vim_isblankline(lbuf))
{
search_info.curr_offset = ftell(fp);
eof = vim_fgets(lbuf, LSIZE, fp);
}
if (eof)
{
/* Hit end of file. Skip backwards. */
state = TS_SKIP_BACK;
search_info.match_offset = ftell(fp);
continue;
}
}
/*
* Not jumping around in the file: Read the next line.
*/
else
#endif
{
/* skip empty and blank lines */
do
{
#ifdef USE_CSCOPE
if (use_cscope)
eof = cs_fgets(lbuf, LSIZE);
else
#endif
eof = vim_fgets(lbuf, LSIZE, fp);
} while (!eof && vim_isblankline(lbuf));
if (eof
#ifdef USE_CSCOPE
&& !use_cscope
#endif
)
{
#ifdef EMACS_TAGS
if (incstack_idx) /* this was an included file */
{
--incstack_idx;
fclose(fp); /* end of this file ... */
fp = incstack[incstack_idx].fp;
STRCPY(tag_fname, incstack[incstack_idx].etag_fname);
vim_free(incstack[incstack_idx].etag_fname);
is_etag = 1; /* (only etags can include) */
continue; /* ... continue with parent file */
}
else
#endif
break; /* end of file */
}
}
line_read_in:
#ifdef EMACS_TAGS
/*
* Emacs tags line with CTRL-L: New file name on next line.
* The file name is followed by a ','.
*/
if (*lbuf == Ctrl('L')) /* remember etag file name in ebuf */
{
is_etag = 1; /* in case at the start */
state = TS_LINEAR;
if (!vim_fgets(ebuf, LSIZE, fp))
{
for (p = ebuf; *p && *p != ','; p++)
;
*p = NUL;
/*
* atoi(p+1) is the number of bytes before the next ^L
* unless it is an include statement.
*/
if (STRNCMP(p + 1, "include", 7) == 0
&& incstack_idx < INCSTACK_SIZE)
{
if ((incstack[incstack_idx].etag_fname =
vim_strsave(tag_fname)) != NULL)
{
incstack[incstack_idx].fp = fp;
if ((fp = mch_fopen((char *)ebuf, "r")) == NULL)
{
fp = incstack[incstack_idx].fp;
vim_free(incstack[incstack_idx].etag_fname);
}
else
{
STRCPY(tag_fname, ebuf);
++incstack_idx;
}
is_etag = 0; /* we can include anything */
}
}
}
continue;
}
#endif
/*
* When still at the start of the file, check for Emacs tags file
* format, and for "not sorted" flag.
*/
if (state == TS_START)
{
#ifdef BINARY_TAGS
/*
* When there is no tag head, or ignoring case, need to do a
* linear search.
* When no "!_TAG_" is found, default to binary search. If
* the tag file isn't sorted, the second loop will find it.
* When "!_TAG_FILE_SORTED" found: start binary search if
* flag set.
* For cscope, it's always linear.
*/
#ifdef USE_CSCOPE
if (linear || use_cscope)
#else
if (linear)
#endif
state = TS_LINEAR;
else if (STRNCMP(lbuf, "!_TAG_", 6) > 0)
state = TS_BINARY;
else if (STRNCMP(lbuf, "!_TAG_FILE_SORTED\t", 18) == 0)
{
/* Check sorted flag */
if (lbuf[18] == '1')
state = TS_BINARY;
else
state = TS_LINEAR;
}
#else
state = TS_LINEAR;
#endif
#ifdef BINARY_TAGS
/*
* When starting a binary search, get the size of the file and
* compute the first offset.
*/
if (state == TS_BINARY)
{
/* Get the tag file size (don't use mch_fstat(), it's not
* portable). */
if ((filesize = lseek(fileno(fp),
(off_t)0L, SEEK_END)) <= 0)
state = TS_LINEAR;
else
{
lseek(fileno(fp), (off_t)0L, SEEK_SET);
/* Calculate the first read offset in the file. Start
* the search in the middle of the file.
*/
search_info.low_offset = 0;
search_info.low_char = 0;
search_info.high_offset = filesize;
search_info.high_char = 0xff;
}
continue;
}
#endif
}
/*
* Figure out where the different strings are in this line.
* For "normal" tags: Do a quick check if the tag matches.
* This speeds up tag searching a lot!
*/
if (patheadlen
#ifdef EMACS_TAGS
&& !is_etag
#endif
)
{
tagp.tagname = lbuf;
#ifdef TAG_ANY_WHITE
tagp.tagname_end = skiptowhite(lbuf);
if (*tagp.tagname_end == NUL) /* corrupted tag line */
#else
tagp.tagname_end = vim_strchr(lbuf, TAB);
if (tagp.tagname_end == NULL) /* corrupted tag line */
#endif
{
EMSG2(e_tagformat, tag_fname);
stop_searching = TRUE;
break;
}
#ifdef OLD_STATIC_TAGS
/*
* Check for old style static tag: "file:tag file .."
*/
tagp.fname = NULL;
for (p = lbuf; p < tagp.tagname_end; ++p)
{
if (*p == ':')
{
if (tagp.fname == NULL)
#ifdef TAG_ANY_WHITE
tagp.fname = skipwhite(tagp.tagname_end);
#else
tagp.fname = tagp.tagname_end + 1;
#endif
if ( fnamencmp(lbuf, tagp.fname, p - lbuf) == 0
#ifdef TAG_ANY_WHITE
&& vim_iswhite(tagp.fname[p - lbuf])
#else
&& tagp.fname[p - lbuf] == TAB
#endif
)
{
/* found one */
tagp.tagname = p + 1;
break;
}
}
}
#endif
/*
* Skip this line if the length of the tag is different and
* there is no regexp, or the tag is too short.
*/
cmplen = tagp.tagname_end - tagp.tagname;
if (p_tl != 0 && cmplen > p_tl) /* adjust for 'taglength' */
cmplen = p_tl;
if (has_re && patheadlen < cmplen)
cmplen = patheadlen;
else if (state == TS_LINEAR && patheadlen != cmplen)
continue;
#ifdef BINARY_TAGS
if (state == TS_BINARY)
{
/*
* Simplistic check for unsorted tags file.
*/
if ((int)tagp.tagname[0] < search_info.low_char
|| (int)tagp.tagname[0] > search_info.high_char)
sort_error = TRUE;
/*
* Compare the current tag with the searched tag.
*/
tagcmp = STRNCMP(tagp.tagname, pathead, cmplen);
/*
* A match with a shorter tag means to search forward.
* A match with a longer tag means to search backward.
*/
if (tagcmp == 0)
{
if (cmplen < patheadlen)
tagcmp = -1;
else if (cmplen > patheadlen)
tagcmp = 1;
}
if (tagcmp == 0)
{
/* We've located the tag, now skip back and search
* forward until the first matching tag is found.
*/
state = TS_SKIP_BACK;
search_info.match_offset = search_info.curr_offset;
continue;
}
if (tagcmp < 0)
{
search_info.curr_offset = ftell(fp);
if (search_info.curr_offset < search_info.high_offset)
{
search_info.low_offset = search_info.curr_offset;
search_info.low_char = tagp.tagname[0];
continue;
}
}
if (tagcmp > 0
&& search_info.curr_offset != search_info.high_offset)
{
search_info.high_offset = search_info.curr_offset;
search_info.high_char = tagp.tagname[0];
continue;
}
/* No match yet and are at the end of the binary search. */
break;
}
else if (state == TS_SKIP_BACK)
{
if (STRNICMP(tagp.tagname, pathead, cmplen) != 0)
state = TS_STEP_FORWARD;
continue;
}
else if (state == TS_STEP_FORWARD)
{
if (STRNICMP(tagp.tagname, pathead, cmplen))
{
if ((off_t)ftell(fp) > search_info.match_offset)
break; /* past last match */
else
continue; /* before first match */
}
}
else
#endif
/* skip this match if it can't match */
if (STRNICMP(tagp.tagname, pathead, cmplen))
continue;
/*
* Can be a matching tag, isolate the file name and command.
*/
#ifdef OLD_STATIC_TAGS
if (tagp.fname == NULL)
#endif
#ifdef TAG_ANY_WHITE
tagp.fname = skipwhite(tagp.tagname_end);
#else
tagp.fname = tagp.tagname_end + 1;
#endif
#ifdef TAG_ANY_WHITE
tagp.fname_end = skiptowhite(tagp.fname);
tagp.command = skipwhite(tagp.fname_end);
if (*tagp.command == NUL)
#else
tagp.fname_end = vim_strchr(tagp.fname, TAB);
tagp.command = tagp.fname_end + 1;
if (tagp.fname_end == NULL)
#endif
i = FAIL;
else
i = OK;
}
else
i = parse_tag_line(lbuf,
#ifdef EMACS_TAGS
is_etag,
#endif
&tagp);
if (i == FAIL)
{
EMSG2(e_tagformat, tag_fname);
stop_searching = TRUE;
break;
}
#ifdef EMACS_TAGS
if (is_etag)
tagp.fname = ebuf;
#endif
/*
* First try matching with the pattern literally (also when it is
* a regexp).
*/
cmplen = tagp.tagname_end - tagp.tagname;
if (p_tl != 0 && cmplen > p_tl) /* adjust for 'taglength' */
cmplen = p_tl;
/* if tag length does not match, don't try comparing */
if (patlen != cmplen)
match = FALSE;
else
{
if (reg_ic)
{
match = (STRNICMP(tagp.tagname, pat, cmplen) == 0);
if (match)
match_no_ic = (STRNCMP(tagp.tagname, pat, cmplen) == 0);
}
else
match = (STRNCMP(tagp.tagname, pat, cmplen) == 0);
}
/*
* Has a regexp: Also find tags matching regexp "prog".
*/
match_re = FALSE;
if (!match && prog != NULL)
{
int cc;
cc = *tagp.tagname_end;
*tagp.tagname_end = NUL;
match = vim_regexec(prog, tagp.tagname, TRUE);
matchoff = (int)(prog->startp[0] - tagp.tagname);
if (match && reg_ic)
{
reg_ic = FALSE;
match_no_ic = vim_regexec(prog, tagp.tagname, TRUE);
reg_ic = TRUE;
}
*tagp.tagname_end = cc;
match_re = TRUE;
}
/*
* If a match is found, add it to ga_match[].
*/
if (match)
{
/* Decide in which array to store this match. */
is_current = test_for_current(
#ifdef EMACS_TAGS
is_etag,
#endif
tagp.fname, tagp.fname_end, tag_fname);
#ifdef EMACS_TAGS
is_static = FALSE;
if (!is_etag) /* emacs tags are never static */
#endif
{
#ifdef OLD_STATIC_TAGS
if (tagp.tagname != lbuf) /* detected static tag before */
is_static = TRUE;
else
#endif
is_static = test_for_static(&tagp);
}
/* decide in which of the six table to store this match */
if (is_static)
{
if (is_current)
mtt = MT_ST_CUR;
else
mtt = MT_ST_OTH;
}
else
{
if (is_current)
mtt = MT_GL_CUR;
else
mtt = MT_GL_OTH;
}
if (reg_ic && !match_no_ic)
mtt += MT_IC_OFF;
if (match_re)
mtt += MT_RE_OFF;
if (ga_grow(&ga_match[mtt], 1) == OK)
{
if (help_only)
{
/*
* Append the help-heuristic number after the
* tagname, for sorting it later.
*/
*tagp.tagname_end = NUL;
len = tagp.tagname_end - tagp.tagname;
p = vim_strnsave(tagp.tagname, len + 10);
if (p != NULL)
sprintf((char *)p + len + 1, "%06d",
help_heuristic(tagp.tagname,
match_re ? matchoff : 0, !match_no_ic));
*tagp.tagname_end = TAB;
++len; /* compare one more char */
}
else if (name_only)
{
p = NULL;
len = 0;
if (get_it_again)
{
char_u *temp_end = tagp.command;
if ((*temp_end) == '/')
while ( *temp_end && (*temp_end != '\r')
&& (*temp_end != '\n')
&& (*temp_end != '$'))
temp_end++;
if ((tagp.command + 2) < temp_end)
{
len = temp_end - tagp.command - 2;
p = vim_strnsave(tagp.command + 2, len);
}
get_it_again = FALSE;
}
else
{
len = tagp.tagname_end - tagp.tagname;
p = vim_strnsave(tagp.tagname, len);
/* if wanted, re-read line to get long form too*/
if (State & INSERT)
get_it_again = p_sft;
}
++len; /* compare one more char */
}
else
{
/* Save the tag in a buffer.
* Emacs tag: <mtt><tag_fname><NUL><ebuf><NUL><lbuf>
* other tag: <mtt><tag_fname><NUL><NUL><lbuf>
* without Emacs tags: <mtt><tag_fname><NUL><lbuf>
*/
len = STRLEN(tag_fname) + STRLEN(lbuf) + 3;
#ifdef EMACS_TAGS
if (is_etag)
len += STRLEN(ebuf) + 1;
else
++len;
#endif
p = alloc(len);
if (p != NULL)
{
p[0] = mtt;
STRCPY(p + 1, tag_fname);
s = p + 1 + STRLEN(tag_fname) + 1;
#ifdef EMACS_TAGS
if (is_etag)
{
STRCPY(s, ebuf);
s += STRLEN(ebuf) + 1;
}
else
*s++ = NUL;
#endif
STRCPY(s, lbuf);
}
}
if (p != NULL)
{
/*
* Don't add identical matches.
* This can take a lot of time when finding many
* matches, check for CTRL-C now and then.
*/
for (i = ga_match[mtt].ga_len; --i >= 0 && !got_int; )
{
if (vim_memcmp(
((char_u **)(ga_match[mtt].ga_data))[i],
p, (size_t)len) == 0)
break;
line_breakcheck();
}
if (i < 0)
{
((char_u **)(ga_match[mtt].ga_data))
[ga_match[mtt].ga_len++] = p;
ga_match[mtt].ga_room--;
++match_count;
}
else
vim_free(p);
}
}
else /* Out of memory! Just forget about the rest. */
{
retval = OK;
stop_searching = TRUE;
break;
}
}
#ifdef USE_CSCOPE
if (use_cscope && eof)
break;
#endif
} /* forever */
#ifdef USE_CSCOPE
if (!use_cscope)
#endif
fclose(fp);
#ifdef EMACS_TAGS
while (incstack_idx)
{
--incstack_idx;
fclose(incstack[incstack_idx].fp);
vim_free(incstack[incstack_idx].etag_fname);
}
#endif
#ifdef BINARY_TAGS
if (sort_error)
{
EMSG2("Tags file not sorted: %s", tag_fname);
sort_error = FALSE;
}
#endif
/*
* Stop searching if sufficient tags have been found.
*/
if (match_count >= mincount)
{
retval = OK;
stop_searching = TRUE;
}
#ifdef USE_CSCOPE
if (stop_searching || use_cscope)
#else
if (stop_searching)
#endif
break;
} /* end of for-each-file loop */
#ifdef BINARY_TAGS
/* stop searching when already did a linear search, or when
* TAG_NOIC used, and 'ignorecase' not set */
if (stop_searching || linear || (!p_ic && noic))
break;
# ifdef USE_CSCOPE
if (use_cscope)
break;
# endif
reg_ic = TRUE; /* try another time while ignoring case */
}
#endif
if (!stop_searching)
{
if (!did_open && verbose) /* never opened any tags file */
EMSG("No tags file");
retval = OK; /* It's OK even when no tag found */
}
findtag_end:
vim_free(lbuf);
vim_free(prog);
vim_free(tag_fname);
#ifdef EMACS_TAGS
vim_free(ebuf);
#endif
/*
* Move the matches from the ga_match[] arrays into one list of
* matches. When retval == FAIL, free the matches.
*/
if (retval == FAIL)
match_count = 0;
if (match_count > 0)
matches = (char_u **)lalloc((long_u)(match_count * sizeof(char_u *)),
TRUE);
else
matches = NULL;
match_count = 0;
for (mtt = 0; mtt < MT_COUNT; ++mtt)
{
for (i = 0; i < ga_match[mtt].ga_len; ++i)
{
p = ((char_u **)(ga_match[mtt].ga_data))[i];
if (matches == NULL)
vim_free(p);
else
matches[match_count++] = p;
}
ga_clear(&ga_match[mtt]);
}
*matchesp = matches;
*num_matches = match_count;
curbuf->b_help = help_save;
return retval;
}
/*
* Get the next name of a tag file from the tag file list.
* For help files, use "tags" file only.
*
* Return FAIL if no more tag file names, OK otherwise.
*/
static int
get_tagfname(first, buf)
int first; /* TRUE when first file name is wanted */
char_u *buf; /* pointer to buffer of LSIZE chars */
{
static char_u *np = NULL;
char_u *fname;
size_t path_len, fname_len;
/*
* A list is kept of the files that have been visited.
*/
struct visited
{
struct visited *v_next;
#if defined(UNIX)
struct stat v_st;
#else
char_u v_fname[1]; /* actually longer */
#endif
};
static struct visited *first_visited = NULL;
struct visited *vp;
#ifdef UNIX
struct stat st;
#else
char_u *expand_buf;
#endif
if (first)
{
np = p_tags;
while (first_visited != NULL)
{
vp = first_visited->v_next;
vim_free(first_visited);
first_visited = vp;
}
}
if (np == NULL) /* tried allready (or bogus call) */
return FAIL;
/*
* For a help window only try the file 'tags' in the same
* directory as 'helpfile'.
*/
if (curbuf->b_help)
{
path_len = gettail(p_hf) - p_hf;
if (path_len + 9 >= LSIZE)
return FAIL;
mch_memmove(buf, p_hf, path_len);
STRCPY(buf + path_len, "tags");
np = NULL; /* try only once */
}
else
{
#ifndef UNIX
expand_buf = alloc(MAXPATHL);
if (expand_buf == NULL)
return FAIL;
#endif
/*
* Loop until we have found a file name that can be used.
*/
for (;;)
{
if (*np == NUL) /* tried all possibilities */
{
#ifndef UNIX
vim_free(expand_buf);
#endif
return FAIL;
}
/*
* Copy next file name into buf.
*/
(void)copy_option_part(&np, buf, LSIZE, " ,");
/*
* Tag file name starting with "./": Replace '.' with path of
* current file.
* Only do this when 't' flag not included in 'cpo'.
* If no file name, use current directory.
*/
if (buf[0] == '.' && vim_ispathsep(buf[1])
&& vim_strchr(p_cpo, CPO_DOTTAG) == NULL
&& curbuf->b_fname != NULL)
{
path_len = gettail(curbuf->b_fname) - curbuf->b_fname;
fname = buf + 1;
while (vim_ispathsep(*fname)) /* skip '/' and the like */
++fname;
fname_len = STRLEN(fname);
if (fname_len + path_len + 1 > LSIZE)
continue;
mch_memmove(buf + path_len, fname, fname_len + 1);
mch_memmove(buf, curbuf->b_fname, path_len);
}
/*
* Check if this tags file has been used already.
* If file doesn't exist, skip it.
*/
#if defined(UNIX)
if (mch_stat((char *)buf, &st) < 0)
#else
if (mch_FullName(buf, expand_buf, MAXPATHL, TRUE) == FAIL)
#endif
continue;
for (vp = first_visited; vp != NULL; vp = vp->v_next)
#if defined(UNIX)
if (vp->v_st.st_dev == st.st_dev &&
vp->v_st.st_ino == st.st_ino)
#else
if (fnamecmp(vp->v_fname, expand_buf) == 0)
#endif
break;
if (vp != NULL) /* already visited, skip it */
continue;
/*
* Found the next name. Add it to the list of visited files.
*/
#ifdef UNIX
vp = (struct visited *)alloc((unsigned)sizeof(struct visited));
#else
vp = (struct visited *)alloc((unsigned)(sizeof(struct visited) +
STRLEN(expand_buf)));
#endif
if (vp != NULL)
{
#ifdef UNIX
vp->v_st = st;
#else
STRCPY(vp->v_fname, expand_buf);
#endif
vp->v_next = first_visited;
first_visited = vp;
}
break;
}
#ifndef UNIX
vim_free(expand_buf);
#endif
}
return OK;
}
/*
* Parse one line from the tags file. Find start/end of tag name, start/end of
* file name and start of search pattern.
*
* If is_etag is TRUE, tagp->fname and tagp->fname_end are not set.
*
* Return FAIL if there is a format error in this line, OK otherwise.
*/
static int
parse_tag_line(lbuf,
#ifdef EMACS_TAGS
is_etag,
#endif
tagp)
char_u *lbuf; /* line to be parsed */
#ifdef EMACS_TAGS
int is_etag;
#endif
struct tag_pointers *tagp;
{
char_u *p;
#ifdef EMACS_TAGS
char_u *p_7f;
if (is_etag)
{
/*
* There are two formats for an emacs tag line:
* 1: struct EnvBase ^?EnvBase^A139,4627
* 2: #define ARPB_WILD_WORLD ^?153,5194
*/
p_7f = vim_strchr(lbuf, 0x7f);
if (p_7f == NULL)
return FAIL;
/* Find ^A. If not found the line number is after the 0x7f */
p = vim_strchr(p_7f, Ctrl('A'));
if (p == NULL)
p = p_7f + 1;
else
++p;
if (!isdigit(*p)) /* check for start of line number */
return FAIL;
tagp->command = p;
if (p[-1] == Ctrl('A')) /* first format: explicit tagname given */
{
tagp->tagname = p_7f + 1;
tagp->tagname_end = p - 1;
}
else /* second format: isolate tagname */
{
/* find end of tagname */
for (p = p_7f - 1; !vim_iswordc(*p); --p)
if (p == lbuf)
return FAIL;
tagp->tagname_end = p + 1;
while (p >= lbuf && vim_iswordc(*p))
--p;
tagp->tagname = p + 1;
}
}
else /* not an Emacs tag */
{
#endif
/* Isolate the tagname, from lbuf up to the first white */
tagp->tagname = lbuf;
#ifdef TAG_ANY_WHITE
p = skiptowhite(lbuf);
#else
p = vim_strchr(lbuf, TAB);
if (p == NULL)
return FAIL;
#endif
tagp->tagname_end = p;
/* Isolate file name, from first to second white space */
#ifdef TAG_ANY_WHITE
p = skipwhite(p);
#else
if (*p != NUL)
++p;
#endif
tagp->fname = p;
#ifdef TAG_ANY_WHITE
p = skiptowhite(p);
#else
p = vim_strchr(p, TAB);
if (p == NULL)
return FAIL;
#endif
tagp->fname_end = p;
/* find start of search command, after second white space */
#ifdef TAG_ANY_WHITE
p = skipwhite(p);
#else
if (*p != NUL)
++p;
#endif
if (*p == NUL)
return FAIL;
tagp->command = p;
#ifdef EMACS_TAGS
}
#endif
return OK;
}
/*
* Check if tagname is a static tag
*
* Static tags produced by the older ctags program have the format:
* 'file:tag file /pattern'.
* This is only recognized when both occurences of 'file' are the same, to
* avoid recognizing "string::string" or ":exit".
*
* Static tags produced by the new ctags program have the format:
* 'tag file /pattern/;"<Tab>file:' "
*
* Return TRUE if it is a static tag and adjust *tagname to the real tag.
* Return FALSE if it is not a static tag.
*/
static int
test_for_static(tagp)
struct tag_pointers *tagp;
{
char_u *p;
#ifdef OLD_STATIC_TAGS
int len;
/*
* Check for old style static tag: "file:tag file .."
*/
len = tagp->fname_end - tagp->fname;
p = tagp->tagname + len;
if ( p < tagp->tagname_end
&& *p == ':'
&& fnamencmp(tagp->tagname, tagp->fname, len) == 0)
{
tagp->tagname = p + 1;
return TRUE;
}
#endif
/*
* Check for new style static tag ":...<Tab>file:[<Tab>...]"
*/
p = tagp->command;
while ((p = vim_strchr(p, '\t')) != NULL)
{
++p;
if (STRNCMP(p, "file:", 5) == 0)
return TRUE;
}
return FALSE;
}
/*
* Parse a line from a matching tag. Does not change the line itself.
*
* The line that we get looks like this:
* Emacs tag: <mtt><tag_fname><NUL><ebuf><NUL><lbuf>
* other tag: <mtt><tag_fname><NUL><NUL><lbuf>
* without Emacs tags: <mtt><tag_fname><NUL><lbuf>
*
* Return OK or FAIL.
*/
static int
parse_match(lbuf, tagp)
char_u *lbuf; /* input: matching line */
struct tag_pointers *tagp; /* output: pointers into the line */
{
int retval;
char_u *p;
char_u *pc, *pt;
tagp->tag_fname = lbuf + 1;
lbuf += STRLEN(tagp->tag_fname) + 2;
#ifdef EMACS_TAGS
if (*lbuf)
{
tagp->is_etag = TRUE;
tagp->fname = lbuf;
lbuf += STRLEN(lbuf);
tagp->fname_end = lbuf++;
}
else
{
tagp->is_etag = FALSE;
++lbuf;
}
#endif
/* Find search pattern and the file name for non-etags. */
retval = parse_tag_line(lbuf,
#ifdef EMACS_TAGS
tagp->is_etag,
#endif
tagp);
tagp->tagkind = NULL;
tagp->command_end = NULL;
if (retval == OK)
{
/* Try to find a kind field: "kind:<kind>" or just "<kind>"*/
p = tagp->command;
if (find_extra(&p) == OK)
{
tagp->command_end = p;
p += 3; /* skip ";\"\t" */
while (isalpha(*p))
{
if (STRNCMP(p, "kind:", 5) == 0)
{
tagp->tagkind = p + 5;
break;
}
pc = vim_strchr(p, ':');
pt = vim_strchr(p, '\t');
if (pc == NULL || (pt != NULL && pc > pt))
{
tagp->tagkind = p;
break;
}
if (pt == NULL)
break;
p = pt + 1;
}
}
if (tagp->tagkind != NULL)
{
for (p = tagp->tagkind;
*p && *p != '\t' && *p != '\r' && *p != '\n'; ++p)
;
tagp->tagkind_end = p;
}
}
return retval;
}
/*
* Find out the actual file name of a tag. Concatenate the tags file name
* with the matching tag file name.
* Returns an allocated string or NULL (out of memory).
*/
static char_u *
tag_full_fname(tagp)
struct tag_pointers *tagp;
{
char_u *fullname;
int c;
#ifdef EMACS_TAGS
if (tagp->is_etag)
c = 0; /* to shut up GCC */
else
#endif
{
c = *tagp->fname_end;
*tagp->fname_end = NUL;
}
fullname = expand_tag_fname(tagp->fname, tagp->tag_fname, FALSE);
#ifdef EMACS_TAGS
if (!tagp->is_etag)
#endif
*tagp->fname_end = c;
return fullname;
}
/*
* Jump to a tag that has been found in one of the tag files
*
* returns OK for success, NOTAGFILE when file not found, FAIL otherwise.
*/
static int
jumpto_tag(lbuf, forceit)
char_u *lbuf; /* line from the tags file for this tag */
int forceit; /* :ta with ! */
{
int save_secure;
int save_magic;
int save_p_ws, save_p_scs, save_p_ic;
linenr_t save_lnum;
int csave = 0;
char_u *str;
char_u *pbuf; /* search pattern buffer */
char_u *pbuf_end;
char_u *tofree_fname = NULL;
char_u *fname;
struct tag_pointers tagp;
int retval = FAIL;
int getfile_result;
int search_options;
#ifdef EXTRA_SEARCH
int save_no_hlsearch;
#endif
WIN *curwin_save = NULL;
char_u *full_fname = NULL;
pbuf = alloc(LSIZE);
/* parse the match line into the tagp structure */
if (pbuf == NULL || parse_match(lbuf, &tagp) == FAIL)
{
tagp.fname_end = NULL;
goto erret;
}
/* truncate the file name, so it can be used as a string */
csave = *tagp.fname_end;
*tagp.fname_end = NUL;
fname = tagp.fname;
/* copy the command to pbuf[], remove trailing CR/NL */
str = tagp.command;
for (pbuf_end = pbuf; *str && *str != '\n' && *str != '\r'; )
{
#ifdef EMACS_TAGS
if (tagp.is_etag && *str == ',')/* stop at ',' after line number */
break;
#endif
*pbuf_end++ = *str++;
}
*pbuf_end = NUL;
#ifdef EMACS_TAGS
if (!tagp.is_etag)
#endif
{
/*
* Remove the "<Tab>fieldname:value" stuff; we don't need it here.
*/
str = pbuf;
if (find_extra(&str) == OK)
{
pbuf_end = str;
*pbuf_end = NUL;
}
}
/*
* Expand file name, when needed (for environment variables).
* If 'tagrelative' option set, may change file name.
*/
fname = expand_tag_fname(fname, tagp.tag_fname, TRUE);
if (fname == NULL)
goto erret;
tofree_fname = fname; /* free() it later */
/*
* check if file for tag exists before abandoning current file
*/
if (mch_getperm(fname) < 0)
{
retval = NOTAGFILE;
vim_free(nofile_fname);
nofile_fname = vim_strsave(fname);
if (nofile_fname == NULL)
nofile_fname = (char_u *)"";
goto erret;
}
++RedrawingDisabled;
#ifdef USE_GUI
need_mouse_correct = TRUE;
#endif
if (g_do_tagpreview)
{
/* don't spllit again below */
postponed_split = 0;
/* Save current window */
curwin_save = curwin;
/*
* If we are reusing a window, we may change dir when
* entering it (autocommands) so turn the tag filename
* into a fullpath
*/
if (!curwin->w_preview)
{
full_fname = FullName_save(fname, FALSE);
fname = full_fname;
/*
* Make the preview window the current window.
* Open a preview window when needed.
*/
prepare_tagpreview();
}
}
/* if it was a CTRL-W CTRL-] command split window now */
if (postponed_split)
win_split(postponed_split > 0 ? postponed_split : 0, FALSE, FALSE);
/* A :ta from a help file will keep the b_help flag set. */
keep_help_flag = curbuf->b_help;
getfile_result = getfile(0, fname, NULL, TRUE, (linenr_t)0, forceit);
keep_help_flag = FALSE;
if (getfile_result <= 0) /* got to the right file */
{
curwin->w_set_curswant = TRUE;
postponed_split = 0;
save_secure = secure;
secure = 1;
save_magic = p_magic;
p_magic = FALSE; /* always execute with 'nomagic' */
#ifdef EXTRA_SEARCH
/* Save value of no_hlsearch, jumping to a tag is not a real search */
save_no_hlsearch = no_hlsearch;
#endif
tag_modified = FALSE;
/*
* If 'cpoptions' contains 't', store the search pattern for the "n"
* command. If 'cpoptions' does not contain 't', the search pattern
* is not stored.
*/
if (vim_strchr(p_cpo, CPO_TAGPAT) != NULL)
search_options = 0;
else
search_options = SEARCH_KEEP;
/*
* If the command is a search, try here.
*
* Reset 'smartcase' for the search, since the search pattern was not
* typed by the user.
* Only use do_search() when there is a full search command, without
* anything following.
*/
str = pbuf;
if (pbuf[0] == '/' || pbuf[0] == '?')
str = skip_regexp(pbuf + 1, pbuf[0], FALSE) + 1;
if (str > pbuf_end - 1) /* search command with nothing following */
{
save_p_ws = p_ws;
save_p_ic = p_ic;
save_p_scs = p_scs;
p_ws = TRUE; /* need 'wrapscan' for backward searches */
p_ic = FALSE; /* don't ignore case now */
p_scs = FALSE;
/* put pattern in search history */
add_to_history(HIST_SEARCH, pbuf + 1, TRUE);
save_lnum = curwin->w_cursor.lnum;
curwin->w_cursor.lnum = 0; /* start search before first line */
if (do_search(NULL, pbuf[0], pbuf + 1, (long)1, search_options))
retval = OK;
else
{
int found = 1;
int cc;
/*
* try again, ignore case now
*/
p_ic = TRUE;
if (!do_search(NULL, pbuf[0], pbuf + 1, (long)1,
search_options))
{
/*
* Failed to find pattern, take a guess: "^func ("
*/
found = 2;
(void)test_for_static(&tagp);
cc = *tagp.tagname_end;
*tagp.tagname_end = NUL;
sprintf((char *)pbuf, "^%s\\s\\*(", tagp.tagname);
if (!do_search(NULL, '/', pbuf, (long)1, search_options))
{
/* Guess again: "^char * \<func (" */
sprintf((char *)pbuf, "^\\[#a-zA-Z_]\\.\\*\\<%s\\s\\*(",
tagp.tagname);
if (!do_search(NULL, '/', pbuf, (long)1,
search_options))
found = 0;
}
*tagp.tagname_end = cc;
}
if (found == 0)
{
EMSG("Can't find tag pattern");
curwin->w_cursor.lnum = save_lnum;
}
else
{
/*
* Only give a message when really guessed, not when 'ic'
* is set and match found while ignoring case.
*/
if (found == 2 || !save_p_ic)
{
MSG("Couldn't find tag, just guessing!");
if (!msg_scrolled)
{
out_flush();
ui_delay(1000L, TRUE);
}
}
retval = OK;
}
}
p_ws = save_p_ws;
p_ic = save_p_ic;
p_scs = save_p_scs;
/* A search command may have positioned the cursor beyond the end
* of the line. May need to correct that here. */
adjust_cursor();
}
else
{
curwin->w_cursor.lnum = 1; /* start command in line 1 */
do_cmdline(pbuf, NULL, NULL, DOCMD_NOWAIT|DOCMD_VERBOSE);
retval = OK;
}
/*
* When the command has set the b_changed flag, give a warning to the
* user about this.
*/
if (tag_modified)
{
secure = 2;
EMSG("WARNING: tag command changed a buffer!!!");
}
if (secure == 2) /* done something that is not allowed */
wait_return(TRUE);
secure = save_secure;
p_magic = save_magic;
#ifdef EXTRA_SEARCH
/* restore no_hlsearch when keeping the old search pattern */
if (search_options)
no_hlsearch = save_no_hlsearch;
#endif
/* Return OK if jumped to another file (at least we found the file!). */
if (getfile_result == -1)
retval = OK;
/*
* For a help buffer: Put the cursor line at the top of the window,
* the help subject will be below it.
*/
if (curbuf->b_help)
{
set_topline(curwin, curwin->w_cursor.lnum);
update_topline(); /* correct for 'so' */
update_screen(NOT_VALID);
}
if (g_do_tagpreview)
{
if (curwin_save != NULL && curwin != curwin_save)
{
/* Return cursor to where we were */
validate_cursor();
update_screen(VALID);
win_enter(curwin_save, TRUE);
}
}
--RedrawingDisabled;
}
else
{
--RedrawingDisabled;
if (postponed_split) /* close the window */
{
close_window(curwin, FALSE);
postponed_split = 0;
}
}
erret:
g_do_tagpreview = 0; /* For next time */
if (tagp.fname_end != NULL)
*tagp.fname_end = csave;
vim_free(pbuf);
vim_free(tofree_fname);
vim_free(full_fname);
return retval;
}
/*
* If "expand" is TRUE, expand wildcards in fname.
* If 'tagrelative' option set, change fname (name of file containing tag)
* according to tag_fname (name of tag file containing fname).
* Returns a pointer to allocated memory (or NULL when out of memory).
*/
static char_u *
expand_tag_fname(fname, tag_fname, expand)
char_u *fname;
char_u *tag_fname;
int expand;
{
char_u *p;
char_u *retval;
char_u *expanded_fname = NULL;
/*
* Expand file name (for environment variables) when needed.
*/
if (expand && mch_has_wildcard(fname))
{
expand_context = EXPAND_FILES;
expanded_fname = ExpandOne((char_u *)fname, NULL,
WILD_LIST_NOTFOUND|WILD_SILENT, WILD_EXPAND_FREE);
if (expanded_fname != NULL)
fname = expanded_fname;
}
if ((p_tr || curbuf->b_help)
&& !mch_isFullName(fname)
&& (p = gettail(tag_fname)) != tag_fname)
{
retval = alloc(MAXPATHL);
if (retval != NULL)
{
STRCPY(retval, tag_fname);
STRNCPY(retval + (p - tag_fname), fname,
MAXPATHL - (p - tag_fname));
/*
* Translate names like "src/a/../b/file.c" into "src/b/file.c".
*/
simplify_filename(retval);
}
}
else
retval = vim_strsave(fname);
vim_free(expanded_fname);
return retval;
}
/*
* Moves the tail part of the path (including the terminating NUL) pointed to
* by "tail" to the new location pointed to by "here". This should accomodate
* an overlapping move.
*/
#define movetail(here, tail) mch_memmove(here, tail, STRLEN(tail) + (size_t)1)
/*
* Converts a file name into a canonical form. It simplifies a file name into
* its simplest form by stripping out unneeded components, if any. The
* resulting file name is simplified in place and will either be the same
* length as that supplied, or shorter.
*/
void
simplify_filename(filename)
char_u *filename;
{
#ifndef AMIGA /* Amiga doesn't have "..", it uses "/" */
int components = 0;
char_u *p, *tail, *start;
#ifdef UNIX
char_u *orig = vim_strsave(filename);
if (orig == NULL)
return;
#endif
p = filename;
#ifdef BACKSLASH_IN_FILENAME
if (p[1] == ':') /* skip "x:" */
p += 2;
#endif
while (vim_ispathsep(*p))
++p;
start = p; /* remember start after "c:/" or "/" or "//" */
do
{
/* At this point "p" is pointing to the char following a "/". */
#ifdef VMS
/* VMS allows device:[path] - don't strip the [ in directory */
if ((*p == '[' || *p == '<') && p > filename && p[-1] == ':')
{
/* :[ or :< composition: vms directory component */
++components;
p = getnextcomp(p + 1);
}
/* allow remote calls as host"user passwd"::device:[path] */
else if (p[0] == ':' && p[1] == ':' && p > filename && p[-1] == '"' )
{
/* ":: composition: vms host/passwd component */
++components;
p = getnextcomp(p + 2);
}
else
#endif
if (vim_ispathsep(*p))
movetail(p, p + 1); /* remove duplicate "/" */
else if (p[0] == '.' && vim_ispathsep(p[1]))
movetail(p, p + 2); /* strip "./" */
else if (p[0] == '.' && p[1] == '.' && vim_ispathsep(p[2]))
{
if (components > 0) /* strip one preceding component */
{
tail = p + 3; /* skip to after "../" or "..///" */
while (vim_ispathsep(*tail))
++tail;
--p;
/* skip back to after previous '/' */
while (p > start && !vim_ispathsep(p[-1]))
--p;
/* skip back to after first '/' in a row */
while (p - 1 > start && vim_ispathsep(p[-2]))
--p;
movetail(p, tail); /* strip previous component */
--components;
}
else /* leading "../" */
p += 3; /* skip to char after "/" */
}
else
{
++components; /* simple path component */
p = getnextcomp(p);
}
} while (p != NULL && *p != NUL);
#ifdef UNIX
/* Check that the new file name is really the same file. This will not be
* the case when using symbolic links: "dir/link/../name" != "dir/name". */
{
struct stat orig_st, new_st;
if ( mch_stat((char *)orig, &orig_st) < 0
|| mch_stat((char *)filename, &new_st) < 0
|| orig_st.st_ino != new_st.st_ino
|| orig_st.st_dev != new_st.st_dev)
STRCPY(filename, orig);
vim_free(orig);
}
#endif
#endif /* !AMIGA */
}
/*
* Check if we have a tag for the current file.
* This is a bit slow, because of the full path compare in fullpathcmp().
* Return TRUE if tag for file "fname" if tag file "tag_fname" is for current
* file.
*/
static int
#ifdef EMACS_TAGS
test_for_current(is_etag, fname, fname_end, tag_fname)
int is_etag;
#else
test_for_current(fname, fname_end, tag_fname)
#endif
char_u *fname;
char_u *fname_end;
char_u *tag_fname;
{
int c;
int retval = FALSE;
char_u *fullname;
if (curbuf->b_ffname != NULL) /* if the current buffer has a name */
{
#ifdef EMACS_TAGS
if (is_etag)
c = 0; /* to shut up GCC */
else
#endif
{
c = *fname_end;
*fname_end = NUL;
}
fullname = expand_tag_fname(fname, tag_fname, TRUE);
if (fullname != NULL)
{
retval = (fullpathcmp(fullname, curbuf->b_ffname, TRUE) & FPC_SAME);
vim_free(fullname);
}
#ifdef EMACS_TAGS
if (!is_etag)
#endif
*fname_end = c;
}
return retval;
}
/*
* Find the end of the tagaddress.
* Return OK if ";\"\t" is following, FAIL otherwise.
*/
static int
find_extra(pp)
char_u **pp;
{
char_u *str = *pp;
/* Repeat for addresses separated with ';' */
for (;;)
{
if (isdigit(*str))
str = skipdigits(str);
else if (*str == '/' || *str == '?')
{
str = skip_regexp(str + 1, *str, FALSE);
if (*str != **pp)
str = NULL;
else
++str;
}
else
str = NULL;
if (str == NULL || *str != ';'
|| !(isdigit(str[1]) || str[1] == '/' || str[1] == '?'))
break;
++str; /* skip ';' */
}
if (str != NULL && STRNCMP(str, ";\"\t", 3) == 0)
{
*pp = str;
return OK;
}
return FAIL;
}
#if defined(CMDLINE_COMPL) || defined(PROTO)
int
expand_tags(tagnames, pat, num_file, file)
int tagnames; /* expand tag names */
char_u *pat;
int *num_file;
char_u ***file;
{
int i;
int c;
int tagnmflag;
char_u tagnm[100];
struct tag_pointers t_p;
int ret;
if (tagnames)
tagnmflag = TAG_NAMES;
else
tagnmflag = 0;
if (pat[0] == '^' && pat[1] == '/')
ret = find_tags(pat + 2, num_file, file,
TAG_REGEXP | tagnmflag | TAG_VERBOSE, TAG_MANY);
else
ret = find_tags(pat, num_file, file,
TAG_REGEXP | tagnmflag | TAG_VERBOSE | TAG_NOIC, TAG_MANY);
if (ret == OK && !tagnames)
{
/* Reorganize the tags for display and matching as strings of:
* "<tagname>\0<kind>\0<filename>\0"
*/
for (i = 0; i < *num_file; i++)
{
parse_match((*file)[i], &t_p);
c = t_p.tagname_end - t_p.tagname;
mch_memmove(tagnm, t_p.tagname, (size_t)c);
tagnm[c++] = 0;
tagnm[c++] = (t_p.tagkind != NULL && *t_p.tagkind)
? *t_p.tagkind : 'f';
tagnm[c++] = 0;
mch_memmove((*file)[i] + c, t_p.fname, t_p.fname_end - t_p.fname);
(*file)[i][c + (t_p.fname_end - t_p.fname)] = 0;
mch_memmove((*file)[i], tagnm, (size_t)c);
}
}
return ret;
}
#endif
|