opttbl.c revision 221715
160786Sps/* 2221715Sdelphij * Copyright (C) 1984-2011 Mark Nudelman 360786Sps * 460786Sps * You may distribute under the terms of either the GNU General Public 560786Sps * License or the Less License, as specified in the README file. 660786Sps * 760786Sps * For more information about less, or for information on how to 860786Sps * contact the author, see the README file. 960786Sps */ 1060786Sps 1160786Sps 1260786Sps/* 1360786Sps * The option table. 1460786Sps */ 1560786Sps 1660786Sps#include "less.h" 1760786Sps#include "option.h" 1860786Sps 1960786Sps/* 2060786Sps * Variables controlled by command line options. 2160786Sps */ 2260786Spspublic int quiet; /* Should we suppress the audible bell? */ 2360786Spspublic int how_search; /* Where should forward searches start? */ 2460786Spspublic int top_scroll; /* Repaint screen from top? 2560786Sps (alternative is scroll from bottom) */ 2660786Spspublic int pr_type; /* Type of prompt (short, medium, long) */ 2760786Spspublic int bs_mode; /* How to process backspaces */ 2860786Spspublic int know_dumb; /* Don't complain about dumb terminals */ 2960786Spspublic int quit_at_eof; /* Quit after hitting end of file twice */ 3060786Spspublic int quit_if_one_screen; /* Quit if EOF on first screen */ 3160786Spspublic int squeeze; /* Squeeze multiple blank lines into one */ 3260786Spspublic int tabstop; /* Tab settings */ 3360786Spspublic int back_scroll; /* Repaint screen on backwards movement */ 3460786Spspublic int forw_scroll; /* Repaint screen on forward movement */ 3560786Spspublic int caseless; /* Do "caseless" searches */ 3660786Spspublic int linenums; /* Use line numbers */ 3760786Spspublic int autobuf; /* Automatically allocate buffers as needed */ 38128345Stjrpublic int bufspace; /* Max buffer space per file (K) */ 3960786Spspublic int ctldisp; /* Send control chars to screen untranslated */ 4060786Spspublic int force_open; /* Open the file even if not regular file */ 4160786Spspublic int swindow; /* Size of scrolling window */ 4260786Spspublic int jump_sline; /* Screen line of "jump target" */ 43170256Sdelphijpublic long jump_sline_fraction = -1; 44195941Sdelphijpublic long shift_count_fraction = -1; 4560786Spspublic int chopline; /* Truncate displayed lines at screen width */ 4660786Spspublic int no_init; /* Disable sending ti/te termcap strings */ 4789019Spspublic int no_keypad; /* Disable sending ks/ke termcap strings */ 4860786Spspublic int twiddle; /* Show tildes after EOF */ 4960786Spspublic int show_attn; /* Hilite first unread line */ 5063128Spspublic int shift_count; /* Number of positions to shift horizontally */ 5163128Spspublic int status_col; /* Display a status column */ 52128345Stjrpublic int use_lessopen; /* Use the LESSOPEN filter */ 53161475Sdelphijpublic int quit_on_intr; /* Quit on interrupt */ 54173682Sdelphijpublic int follow_mode; /* F cmd Follows file desc or file name? */ 55173682Sdelphijpublic int oldbot; /* Old bottom of screen behavior {{REMOVE}} */ 5660786Sps#if HILITE_SEARCH 5760786Spspublic int hilite_search; /* Highlight matched search patterns? */ 5860786Sps#endif 5960786Sps 60161475Sdelphijpublic int less_is_more = 0; /* Make compatible with POSIX more */ 61161475Sdelphij 6260786Sps/* 6360786Sps * Long option names. 6460786Sps */ 6560786Spsstatic struct optname a_optname = { "search-skip-screen", NULL }; 6660786Spsstatic struct optname b_optname = { "buffers", NULL }; 6760786Spsstatic struct optname B__optname = { "auto-buffers", NULL }; 6860786Spsstatic struct optname c_optname = { "clear-screen", NULL }; 6960786Spsstatic struct optname d_optname = { "dumb", NULL }; 7060786Sps#if MSDOS_COMPILER 7160786Spsstatic struct optname D__optname = { "color", NULL }; 7260786Sps#endif 7360786Spsstatic struct optname e_optname = { "quit-at-eof", NULL }; 7460786Spsstatic struct optname f_optname = { "force", NULL }; 7560786Spsstatic struct optname F__optname = { "quit-if-one-screen", NULL }; 7660786Sps#if HILITE_SEARCH 7760786Spsstatic struct optname g_optname = { "hilite-search", NULL }; 7860786Sps#endif 7960786Spsstatic struct optname h_optname = { "max-back-scroll", NULL }; 8060786Spsstatic struct optname i_optname = { "ignore-case", NULL }; 8160786Spsstatic struct optname j_optname = { "jump-target", NULL }; 8263128Spsstatic struct optname J__optname = { "status-column", NULL }; 8360786Sps#if USERFILE 8460786Spsstatic struct optname k_optname = { "lesskey-file", NULL }; 8560786Sps#endif 86161475Sdelphijstatic struct optname K__optname = { "quit-on-intr", NULL }; 87128345Stjrstatic struct optname L__optname = { "no-lessopen", NULL }; 8860786Spsstatic struct optname m_optname = { "long-prompt", NULL }; 8960786Spsstatic struct optname n_optname = { "line-numbers", NULL }; 9060786Sps#if LOGFILE 9160786Spsstatic struct optname o_optname = { "log-file", NULL }; 9260786Spsstatic struct optname O__optname = { "LOG-FILE", NULL }; 9360786Sps#endif 9460786Spsstatic struct optname p_optname = { "pattern", NULL }; 9560786Spsstatic struct optname P__optname = { "prompt", NULL }; 9660786Spsstatic struct optname q2_optname = { "silent", NULL }; 9760786Spsstatic struct optname q_optname = { "quiet", &q2_optname }; 9860786Spsstatic struct optname r_optname = { "raw-control-chars", NULL }; 9960786Spsstatic struct optname s_optname = { "squeeze-blank-lines", NULL }; 10060786Spsstatic struct optname S__optname = { "chop-long-lines", NULL }; 10160786Sps#if TAGS 10260786Spsstatic struct optname t_optname = { "tag", NULL }; 10360786Spsstatic struct optname T__optname = { "tag-file", NULL }; 10460786Sps#endif 10560786Spsstatic struct optname u_optname = { "underline-special", NULL }; 10660786Spsstatic struct optname V__optname = { "version", NULL }; 10760786Spsstatic struct optname w_optname = { "hilite-unread", NULL }; 10860786Spsstatic struct optname x_optname = { "tabs", NULL }; 10960786Spsstatic struct optname X__optname = { "no-init", NULL }; 11060786Spsstatic struct optname y_optname = { "max-forw-scroll", NULL }; 11160786Spsstatic struct optname z_optname = { "window", NULL }; 11260786Spsstatic struct optname quote_optname = { "quotes", NULL }; 11360786Spsstatic struct optname tilde_optname = { "tilde", NULL }; 11460786Spsstatic struct optname query_optname = { "help", NULL }; 11563128Spsstatic struct optname pound_optname = { "shift", NULL }; 11689019Spsstatic struct optname keypad_optname = { "no-keypad", NULL }; 117170256Sdelphijstatic struct optname oldbot_optname = { "old-bot", NULL }; 118173682Sdelphijstatic struct optname follow_optname = { "follow-name", NULL }; 11960786Sps 12060786Sps 12160786Sps/* 12260786Sps * Table of all options and their semantics. 12389019Sps * 12489019Sps * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are 12589019Sps * the description of the option when set to 0, 1 or 2, respectively. 12689019Sps * For NUMBER options, odesc[0] is the prompt to use when entering 12789019Sps * a new value, and odesc[1] is the description, which should contain 12889019Sps * one %d which is replaced by the value of the number. 12989019Sps * For STRING options, odesc[0] is the prompt to use when entering 13089019Sps * a new value, and odesc[1], if not NULL, is the set of characters 13189019Sps * that are valid in the string. 13260786Sps */ 133128345Stjrstatic struct loption option[] = 13460786Sps{ 13560786Sps { 'a', &a_optname, 136221715Sdelphij TRIPLE, OPT_ONPLUS, &how_search, NULL, 137128345Stjr { 138128345Stjr "Search includes displayed screen", 139128345Stjr "Search skips displayed screen", 140221715Sdelphij "Search includes all of displayed screen" 141128345Stjr } 14260786Sps }, 14360786Sps 14460786Sps { 'b', &b_optname, 145128345Stjr NUMBER|INIT_HANDLER, 64, &bufspace, opt_b, 146128345Stjr { 147128345Stjr "Max buffer space per file (K): ", 148128345Stjr "Max buffer space per file: %dK", 149128345Stjr NULL 150128345Stjr } 15160786Sps }, 15260786Sps { 'B', &B__optname, 15360786Sps BOOL, OPT_ON, &autobuf, NULL, 154128345Stjr { 155128345Stjr "Don't automatically allocate buffers", 156128345Stjr "Automatically allocate buffers when needed", 157128345Stjr NULL 158128345Stjr } 15960786Sps }, 16060786Sps { 'c', &c_optname, 16160786Sps TRIPLE, OPT_OFF, &top_scroll, NULL, 162128345Stjr { 163128345Stjr "Repaint by scrolling from bottom of screen", 164170256Sdelphij "Repaint by painting from top of screen", 165128345Stjr "Repaint by painting from top of screen" 166128345Stjr } 16760786Sps }, 16860786Sps { 'd', &d_optname, 16960786Sps BOOL|NO_TOGGLE, OPT_OFF, &know_dumb, NULL, 170128345Stjr { 171128345Stjr "Assume intelligent terminal", 172128345Stjr "Assume dumb terminal", 173128345Stjr NULL 174128345Stjr } 17560786Sps }, 17660786Sps#if MSDOS_COMPILER 17760786Sps { 'D', &D__optname, 17860786Sps STRING|REPAINT|NO_QUERY, 0, NULL, opt_D, 179128345Stjr { 180128345Stjr "color desc: ", 181128345Stjr "Ddknsu0123456789.", 182128345Stjr NULL 183128345Stjr } 18460786Sps }, 18560786Sps#endif 18660786Sps { 'e', &e_optname, 18760786Sps TRIPLE, OPT_OFF, &quit_at_eof, NULL, 188128345Stjr { 189128345Stjr "Don't quit at end-of-file", 190128345Stjr "Quit at end-of-file", 191128345Stjr "Quit immediately at end-of-file" 192128345Stjr } 19360786Sps }, 19460786Sps { 'f', &f_optname, 19560786Sps BOOL, OPT_OFF, &force_open, NULL, 196128345Stjr { 197128345Stjr "Open only regular files", 198128345Stjr "Open even non-regular files", 199128345Stjr NULL 200128345Stjr } 20160786Sps }, 20260786Sps { 'F', &F__optname, 20360786Sps BOOL, OPT_OFF, &quit_if_one_screen, NULL, 204128345Stjr { 205128345Stjr "Don't quit if end-of-file on first screen", 206128345Stjr "Quit if end-of-file on first screen", 207128345Stjr NULL 208128345Stjr } 20960786Sps }, 21060786Sps#if HILITE_SEARCH 21160786Sps { 'g', &g_optname, 21260786Sps TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL, 213128345Stjr { 214128345Stjr "Don't highlight search matches", 215128345Stjr "Highlight matches for previous search only", 216128345Stjr "Highlight all matches for previous search pattern", 217128345Stjr } 21860786Sps }, 21960786Sps#endif 22060786Sps { 'h', &h_optname, 22160786Sps NUMBER, -1, &back_scroll, NULL, 222128345Stjr { 223128345Stjr "Backwards scroll limit: ", 224128345Stjr "Backwards scroll limit is %d lines", 225128345Stjr NULL 226128345Stjr } 22760786Sps }, 22860786Sps { 'i', &i_optname, 22960786Sps TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i, 230128345Stjr { 231128345Stjr "Case is significant in searches", 232128345Stjr "Ignore case in searches", 233128345Stjr "Ignore case in searches and in patterns" 234128345Stjr } 23560786Sps }, 23660786Sps { 'j', &j_optname, 237170256Sdelphij STRING, 0, NULL, opt_j, 238128345Stjr { 239128345Stjr "Target line: ", 240221715Sdelphij "0123456789.-", 241128345Stjr NULL 242128345Stjr } 24360786Sps }, 24463128Sps { 'J', &J__optname, 24563128Sps BOOL|REPAINT, OPT_OFF, &status_col, NULL, 246128345Stjr { 247128345Stjr "Don't display a status column", 248128345Stjr "Display a status column", 249128345Stjr NULL 250128345Stjr } 25163128Sps }, 25260786Sps#if USERFILE 25360786Sps { 'k', &k_optname, 25460786Sps STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k, 255128345Stjr { NULL, NULL, NULL } 25660786Sps }, 25760786Sps#endif 258161475Sdelphij { 'K', &K__optname, 259161475Sdelphij BOOL, OPT_OFF, &quit_on_intr, NULL, 260161475Sdelphij { 261161475Sdelphij "Interrupt (ctrl-C) returns to prompt", 262161475Sdelphij "Interrupt (ctrl-C) exits less", 263161475Sdelphij NULL 264161475Sdelphij } 265161475Sdelphij }, 26660786Sps { 'l', NULL, 26760786Sps STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_l, 268128345Stjr { NULL, NULL, NULL } 26960786Sps }, 270128345Stjr { 'L', &L__optname, 271128345Stjr BOOL, OPT_ON, &use_lessopen, NULL, 272128345Stjr { 273128345Stjr "Don't use the LESSOPEN filter", 274128345Stjr "Use the LESSOPEN filter", 275128345Stjr NULL 276128345Stjr } 277128345Stjr }, 27860786Sps { 'm', &m_optname, 27960786Sps TRIPLE, OPT_OFF, &pr_type, NULL, 280128345Stjr { 281128345Stjr "Short prompt", 282128345Stjr "Medium prompt", 283128345Stjr "Long prompt" 284128345Stjr } 28560786Sps }, 28660786Sps { 'n', &n_optname, 28760786Sps TRIPLE|REPAINT, OPT_ON, &linenums, NULL, 288128345Stjr { 289128345Stjr "Don't use line numbers", 290128345Stjr "Use line numbers", 291128345Stjr "Constantly display line numbers" 292128345Stjr } 29360786Sps }, 29460786Sps#if LOGFILE 29560786Sps { 'o', &o_optname, 29660786Sps STRING, 0, NULL, opt_o, 297128345Stjr { "log file: ", NULL, NULL } 29860786Sps }, 29960786Sps { 'O', &O__optname, 30060786Sps STRING, 0, NULL, opt__O, 301128345Stjr { "Log file: ", NULL, NULL } 30260786Sps }, 30360786Sps#endif 30460786Sps { 'p', &p_optname, 30560786Sps STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_p, 306128345Stjr { NULL, NULL, NULL } 30760786Sps }, 30860786Sps { 'P', &P__optname, 30960786Sps STRING, 0, NULL, opt__P, 310128345Stjr { "prompt: ", NULL, NULL } 31160786Sps }, 31260786Sps { 'q', &q_optname, 31360786Sps TRIPLE, OPT_OFF, &quiet, NULL, 314128345Stjr { 315128345Stjr "Ring the bell for errors AND at eof/bof", 316128345Stjr "Ring the bell for errors but not at eof/bof", 317128345Stjr "Never ring the bell" 318128345Stjr } 31960786Sps }, 32060786Sps { 'r', &r_optname, 32160786Sps TRIPLE|REPAINT, OPT_OFF, &ctldisp, NULL, 322128345Stjr { 323128345Stjr "Display control characters as ^X", 324128345Stjr "Display control characters directly", 325128345Stjr "Display control characters directly, processing ANSI sequences" 326128345Stjr } 32760786Sps }, 32860786Sps { 's', &s_optname, 32960786Sps BOOL|REPAINT, OPT_OFF, &squeeze, NULL, 330128345Stjr { 331128345Stjr "Display all blank lines", 332128345Stjr "Squeeze multiple blank lines", 333128345Stjr NULL 334128345Stjr } 33560786Sps }, 33660786Sps { 'S', &S__optname, 33760786Sps BOOL|REPAINT, OPT_OFF, &chopline, NULL, 338128345Stjr { 339128345Stjr "Fold long lines", 340128345Stjr "Chop long lines", 341128345Stjr NULL 342128345Stjr } 34360786Sps }, 34460786Sps#if TAGS 34560786Sps { 't', &t_optname, 34660786Sps STRING|NO_QUERY, 0, NULL, opt_t, 347128345Stjr { "tag: ", NULL, NULL } 34860786Sps }, 34960786Sps { 'T', &T__optname, 35060786Sps STRING, 0, NULL, opt__T, 351128345Stjr { "tags file: ", NULL, NULL } 35260786Sps }, 35360786Sps#endif 35460786Sps { 'u', &u_optname, 35560786Sps TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL, 356128345Stjr { 357128345Stjr "Display underlined text in underline mode", 358128345Stjr "Backspaces cause overstrike", 359128345Stjr "Print backspace as ^H" 360128345Stjr } 36160786Sps }, 36260786Sps { 'V', &V__optname, 36360786Sps NOVAR, 0, NULL, opt__V, 364128345Stjr { NULL, NULL, NULL } 36560786Sps }, 36660786Sps { 'w', &w_optname, 36760786Sps TRIPLE|REPAINT, OPT_OFF, &show_attn, NULL, 368128345Stjr { 369128345Stjr "Don't highlight first unread line", 370128345Stjr "Highlight first unread line after forward-screen", 371128345Stjr "Highlight first unread line after any forward movement", 372128345Stjr } 37360786Sps }, 37460786Sps { 'x', &x_optname, 37589019Sps STRING|REPAINT, 0, NULL, opt_x, 376128345Stjr { 377128345Stjr "Tab stops: ", 378128345Stjr "0123456789,", 379128345Stjr NULL 380128345Stjr } 38160786Sps }, 38260786Sps { 'X', &X__optname, 38360786Sps BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL, 384128345Stjr { 385128345Stjr "Send init/deinit strings to terminal", 386128345Stjr "Don't use init/deinit strings", 387128345Stjr NULL 388128345Stjr } 38960786Sps }, 39060786Sps { 'y', &y_optname, 39160786Sps NUMBER, -1, &forw_scroll, NULL, 392128345Stjr { 393128345Stjr "Forward scroll limit: ", 394128345Stjr "Forward scroll limit is %d lines", 395128345Stjr NULL 396128345Stjr } 39760786Sps }, 39860786Sps { 'z', &z_optname, 39960786Sps NUMBER, -1, &swindow, NULL, 400128345Stjr { 401128345Stjr "Scroll window size: ", 402128345Stjr "Scroll window size is %d lines", 403128345Stjr NULL 404128345Stjr } 40560786Sps }, 40660786Sps { '"', "e_optname, 40760786Sps STRING, 0, NULL, opt_quote, 408128345Stjr { "quotes: ", NULL, NULL } 40960786Sps }, 41060786Sps { '~', &tilde_optname, 41160786Sps BOOL|REPAINT, OPT_ON, &twiddle, NULL, 412128345Stjr { 413128345Stjr "Don't show tildes after end of file", 414128345Stjr "Show tildes after end of file", 415128345Stjr NULL 416128345Stjr } 41760786Sps }, 41860786Sps { '?', &query_optname, 41960786Sps NOVAR, 0, NULL, opt_query, 420128345Stjr { NULL, NULL, NULL } 42160786Sps }, 42263128Sps { '#', £_optname, 423195941Sdelphij STRING, 0, NULL, opt_shift, 424128345Stjr { 425128345Stjr "Horizontal shift: ", 426195941Sdelphij "0123456789.", 427128345Stjr NULL 428128345Stjr } 42963128Sps }, 430221715Sdelphij { OLETTER_NONE, &keypad_optname, 43189019Sps BOOL|NO_TOGGLE, OPT_OFF, &no_keypad, NULL, 432128345Stjr { 433128345Stjr "Use keypad mode", 434128345Stjr "Don't use keypad mode", 435128345Stjr NULL 436128345Stjr } 43789019Sps }, 438221715Sdelphij { OLETTER_NONE, &oldbot_optname, 439170256Sdelphij BOOL, OPT_OFF, &oldbot, NULL, 440170256Sdelphij { 441170256Sdelphij "Use new bottom of screen behavior", 442170256Sdelphij "Use old bottom of screen behavior", 443170256Sdelphij NULL 444170256Sdelphij } 445170256Sdelphij }, 446221715Sdelphij { OLETTER_NONE, &follow_optname, 447173682Sdelphij BOOL, FOLLOW_DESC, &follow_mode, NULL, 448173682Sdelphij { 449221715Sdelphij "F command follows file descriptor", 450221715Sdelphij "F command follows file name", 451173682Sdelphij NULL 452173682Sdelphij } 453173682Sdelphij }, 454128345Stjr { '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } } 45560786Sps}; 45660786Sps 45760786Sps 45860786Sps/* 45960786Sps * Initialize each option to its default value. 46060786Sps */ 46160786Sps public void 46260786Spsinit_option() 46360786Sps{ 464128345Stjr register struct loption *o; 465161475Sdelphij char *p; 46660786Sps 467161475Sdelphij p = lgetenv("LESS_IS_MORE"); 468161475Sdelphij if (p != NULL && *p != '\0') 469161475Sdelphij less_is_more = 1; 470161475Sdelphij 47160786Sps for (o = option; o->oletter != '\0'; o++) 47260786Sps { 47360786Sps /* 47460786Sps * Set each variable to its default. 47560786Sps */ 47660786Sps if (o->ovar != NULL) 47760786Sps *(o->ovar) = o->odefault; 478128345Stjr if (o->otype & INIT_HANDLER) 479128345Stjr (*(o->ofunc))(INIT, (char *) NULL); 48060786Sps } 48160786Sps} 48260786Sps 48360786Sps/* 48460786Sps * Find an option in the option table, given its option letter. 48560786Sps */ 486128345Stjr public struct loption * 48760786Spsfindopt(c) 48860786Sps int c; 48960786Sps{ 490128345Stjr register struct loption *o; 49160786Sps 49260786Sps for (o = option; o->oletter != '\0'; o++) 49360786Sps { 49460786Sps if (o->oletter == c) 49560786Sps return (o); 496161475Sdelphij if ((o->otype & TRIPLE) && ASCII_TO_UPPER(o->oletter) == c) 49760786Sps return (o); 49860786Sps } 49960786Sps return (NULL); 50060786Sps} 50160786Sps 50260786Sps/* 503128345Stjr * 504128345Stjr */ 505128345Stjr static int 506128345Stjris_optchar(c) 507128345Stjr char c; 508128345Stjr{ 509161475Sdelphij if (ASCII_IS_UPPER(c)) 510128345Stjr return 1; 511161475Sdelphij if (ASCII_IS_LOWER(c)) 512128345Stjr return 1; 513128345Stjr if (c == '-') 514128345Stjr return 1; 515128345Stjr return 0; 516128345Stjr} 517128345Stjr 518128345Stjr/* 51960786Sps * Find an option in the option table, given its option name. 52060786Sps * p_optname is the (possibly partial) name to look for, and 52160786Sps * is updated to point after the matched name. 52260786Sps * p_oname if non-NULL is set to point to the full option name. 52360786Sps */ 524128345Stjr public struct loption * 52560786Spsfindopt_name(p_optname, p_oname, p_err) 52660786Sps char **p_optname; 52760786Sps char **p_oname; 52860786Sps int *p_err; 52960786Sps{ 53060786Sps char *optname = *p_optname; 531128345Stjr register struct loption *o; 53260786Sps register struct optname *oname; 53360786Sps register int len; 53460786Sps int uppercase; 535128345Stjr struct loption *maxo = NULL; 53660786Sps struct optname *maxoname = NULL; 53760786Sps int maxlen = 0; 53860786Sps int ambig = 0; 53960786Sps int exact = 0; 54060786Sps 54160786Sps /* 54260786Sps * Check all options. 54360786Sps */ 54460786Sps for (o = option; o->oletter != '\0'; o++) 54560786Sps { 54660786Sps /* 54760786Sps * Check all names for this option. 54860786Sps */ 54960786Sps for (oname = o->onames; oname != NULL; oname = oname->onext) 55060786Sps { 55160786Sps /* 55260786Sps * Try normal match first (uppercase == 0), 55360786Sps * then, then if it's a TRIPLE option, 55460786Sps * try uppercase match (uppercase == 1). 55560786Sps */ 55660786Sps for (uppercase = 0; uppercase <= 1; uppercase++) 55760786Sps { 55860786Sps len = sprefix(optname, oname->oname, uppercase); 559128345Stjr if (len <= 0 || is_optchar(optname[len])) 560128345Stjr { 561128345Stjr /* 562128345Stjr * We didn't use all of the option name. 563128345Stjr */ 564128345Stjr continue; 565128345Stjr } 56660786Sps if (!exact && len == maxlen) 56760786Sps /* 56860786Sps * Already had a partial match, 56960786Sps * and now there's another one that 57060786Sps * matches the same length. 57160786Sps */ 57260786Sps ambig = 1; 57360786Sps else if (len > maxlen) 57460786Sps { 57560786Sps /* 57660786Sps * Found a better match than 57760786Sps * the one we had. 57860786Sps */ 57960786Sps maxo = o; 58060786Sps maxoname = oname; 58160786Sps maxlen = len; 58260786Sps ambig = 0; 58389019Sps exact = (len == (int)strlen(oname->oname)); 58460786Sps } 58560786Sps if (!(o->otype & TRIPLE)) 58660786Sps break; 58760786Sps } 58860786Sps } 58960786Sps } 59060786Sps if (ambig) 59160786Sps { 59260786Sps /* 59360786Sps * Name matched more than one option. 59460786Sps */ 59560786Sps if (p_err != NULL) 59660786Sps *p_err = OPT_AMBIG; 59760786Sps return (NULL); 59860786Sps } 59960786Sps *p_optname = optname + maxlen; 60060786Sps if (p_oname != NULL) 601128345Stjr *p_oname = maxoname == NULL ? NULL : maxoname->oname; 60260786Sps return (maxo); 60360786Sps} 604