opttbl.c revision 173682
160786Sps/* 2170256Sdelphij * Copyright (C) 1984-2007 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; 4460786Spspublic int chopline; /* Truncate displayed lines at screen width */ 4560786Spspublic int no_init; /* Disable sending ti/te termcap strings */ 4689019Spspublic int no_keypad; /* Disable sending ks/ke termcap strings */ 4760786Spspublic int twiddle; /* Show tildes after EOF */ 4860786Spspublic int show_attn; /* Hilite first unread line */ 4963128Spspublic int shift_count; /* Number of positions to shift horizontally */ 5063128Spspublic int status_col; /* Display a status column */ 51128345Stjrpublic int use_lessopen; /* Use the LESSOPEN filter */ 52161475Sdelphijpublic int quit_on_intr; /* Quit on interrupt */ 53173682Sdelphijpublic int follow_mode; /* F cmd Follows file desc or file name? */ 54173682Sdelphijpublic int oldbot; /* Old bottom of screen behavior {{REMOVE}} */ 5560786Sps#if HILITE_SEARCH 5660786Spspublic int hilite_search; /* Highlight matched search patterns? */ 5760786Sps#endif 5860786Sps 59161475Sdelphijpublic int less_is_more = 0; /* Make compatible with POSIX more */ 60161475Sdelphij 6160786Sps/* 6260786Sps * Long option names. 6360786Sps */ 6460786Spsstatic struct optname a_optname = { "search-skip-screen", NULL }; 6560786Spsstatic struct optname b_optname = { "buffers", NULL }; 6660786Spsstatic struct optname B__optname = { "auto-buffers", NULL }; 6760786Spsstatic struct optname c_optname = { "clear-screen", NULL }; 6860786Spsstatic struct optname d_optname = { "dumb", NULL }; 6960786Sps#if MSDOS_COMPILER 7060786Spsstatic struct optname D__optname = { "color", NULL }; 7160786Sps#endif 7260786Spsstatic struct optname e_optname = { "quit-at-eof", NULL }; 7360786Spsstatic struct optname f_optname = { "force", NULL }; 7460786Spsstatic struct optname F__optname = { "quit-if-one-screen", NULL }; 7560786Sps#if HILITE_SEARCH 7660786Spsstatic struct optname g_optname = { "hilite-search", NULL }; 7760786Sps#endif 7860786Spsstatic struct optname h_optname = { "max-back-scroll", NULL }; 7960786Spsstatic struct optname i_optname = { "ignore-case", NULL }; 8060786Spsstatic struct optname j_optname = { "jump-target", NULL }; 8163128Spsstatic struct optname J__optname = { "status-column", NULL }; 8260786Sps#if USERFILE 8360786Spsstatic struct optname k_optname = { "lesskey-file", NULL }; 8460786Sps#endif 85161475Sdelphijstatic struct optname K__optname = { "quit-on-intr", NULL }; 86128345Stjrstatic struct optname L__optname = { "no-lessopen", NULL }; 8760786Spsstatic struct optname m_optname = { "long-prompt", NULL }; 8860786Spsstatic struct optname n_optname = { "line-numbers", NULL }; 8960786Sps#if LOGFILE 9060786Spsstatic struct optname o_optname = { "log-file", NULL }; 9160786Spsstatic struct optname O__optname = { "LOG-FILE", NULL }; 9260786Sps#endif 9360786Spsstatic struct optname p_optname = { "pattern", NULL }; 9460786Spsstatic struct optname P__optname = { "prompt", NULL }; 9560786Spsstatic struct optname q2_optname = { "silent", NULL }; 9660786Spsstatic struct optname q_optname = { "quiet", &q2_optname }; 9760786Spsstatic struct optname r_optname = { "raw-control-chars", NULL }; 9860786Spsstatic struct optname s_optname = { "squeeze-blank-lines", NULL }; 9960786Spsstatic struct optname S__optname = { "chop-long-lines", NULL }; 10060786Sps#if TAGS 10160786Spsstatic struct optname t_optname = { "tag", NULL }; 10260786Spsstatic struct optname T__optname = { "tag-file", NULL }; 10360786Sps#endif 10460786Spsstatic struct optname u_optname = { "underline-special", NULL }; 10560786Spsstatic struct optname V__optname = { "version", NULL }; 10660786Spsstatic struct optname w_optname = { "hilite-unread", NULL }; 10760786Spsstatic struct optname x_optname = { "tabs", NULL }; 10860786Spsstatic struct optname X__optname = { "no-init", NULL }; 10960786Spsstatic struct optname y_optname = { "max-forw-scroll", NULL }; 11060786Spsstatic struct optname z_optname = { "window", NULL }; 11160786Spsstatic struct optname quote_optname = { "quotes", NULL }; 11260786Spsstatic struct optname tilde_optname = { "tilde", NULL }; 11360786Spsstatic struct optname query_optname = { "help", NULL }; 11463128Spsstatic struct optname pound_optname = { "shift", NULL }; 11589019Spsstatic struct optname keypad_optname = { "no-keypad", NULL }; 116170256Sdelphijstatic struct optname oldbot_optname = { "old-bot", NULL }; 117173682Sdelphijstatic struct optname follow_optname = { "follow-name", NULL }; 11860786Sps 11960786Sps 12060786Sps/* 12160786Sps * Table of all options and their semantics. 12289019Sps * 12389019Sps * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are 12489019Sps * the description of the option when set to 0, 1 or 2, respectively. 12589019Sps * For NUMBER options, odesc[0] is the prompt to use when entering 12689019Sps * a new value, and odesc[1] is the description, which should contain 12789019Sps * one %d which is replaced by the value of the number. 12889019Sps * For STRING options, odesc[0] is the prompt to use when entering 12989019Sps * a new value, and odesc[1], if not NULL, is the set of characters 13089019Sps * that are valid in the string. 13160786Sps */ 132128345Stjrstatic struct loption option[] = 13360786Sps{ 13460786Sps { 'a', &a_optname, 13560786Sps BOOL, OPT_OFF, &how_search, NULL, 136128345Stjr { 137128345Stjr "Search includes displayed screen", 138128345Stjr "Search skips displayed screen", 139128345Stjr NULL 140128345Stjr } 14160786Sps }, 14260786Sps 14360786Sps { 'b', &b_optname, 144128345Stjr NUMBER|INIT_HANDLER, 64, &bufspace, opt_b, 145128345Stjr { 146128345Stjr "Max buffer space per file (K): ", 147128345Stjr "Max buffer space per file: %dK", 148128345Stjr NULL 149128345Stjr } 15060786Sps }, 15160786Sps { 'B', &B__optname, 15260786Sps BOOL, OPT_ON, &autobuf, NULL, 153128345Stjr { 154128345Stjr "Don't automatically allocate buffers", 155128345Stjr "Automatically allocate buffers when needed", 156128345Stjr NULL 157128345Stjr } 15860786Sps }, 15960786Sps { 'c', &c_optname, 16060786Sps TRIPLE, OPT_OFF, &top_scroll, NULL, 161128345Stjr { 162128345Stjr "Repaint by scrolling from bottom of screen", 163170256Sdelphij "Repaint by painting from top of screen", 164128345Stjr "Repaint by painting from top of screen" 165128345Stjr } 16660786Sps }, 16760786Sps { 'd', &d_optname, 16860786Sps BOOL|NO_TOGGLE, OPT_OFF, &know_dumb, NULL, 169128345Stjr { 170128345Stjr "Assume intelligent terminal", 171128345Stjr "Assume dumb terminal", 172128345Stjr NULL 173128345Stjr } 17460786Sps }, 17560786Sps#if MSDOS_COMPILER 17660786Sps { 'D', &D__optname, 17760786Sps STRING|REPAINT|NO_QUERY, 0, NULL, opt_D, 178128345Stjr { 179128345Stjr "color desc: ", 180128345Stjr "Ddknsu0123456789.", 181128345Stjr NULL 182128345Stjr } 18360786Sps }, 18460786Sps#endif 18560786Sps { 'e', &e_optname, 18660786Sps TRIPLE, OPT_OFF, &quit_at_eof, NULL, 187128345Stjr { 188128345Stjr "Don't quit at end-of-file", 189128345Stjr "Quit at end-of-file", 190128345Stjr "Quit immediately at end-of-file" 191128345Stjr } 19260786Sps }, 19360786Sps { 'f', &f_optname, 19460786Sps BOOL, OPT_OFF, &force_open, NULL, 195128345Stjr { 196128345Stjr "Open only regular files", 197128345Stjr "Open even non-regular files", 198128345Stjr NULL 199128345Stjr } 20060786Sps }, 20160786Sps { 'F', &F__optname, 20260786Sps BOOL, OPT_OFF, &quit_if_one_screen, NULL, 203128345Stjr { 204128345Stjr "Don't quit if end-of-file on first screen", 205128345Stjr "Quit if end-of-file on first screen", 206128345Stjr NULL 207128345Stjr } 20860786Sps }, 20960786Sps#if HILITE_SEARCH 21060786Sps { 'g', &g_optname, 21160786Sps TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL, 212128345Stjr { 213128345Stjr "Don't highlight search matches", 214128345Stjr "Highlight matches for previous search only", 215128345Stjr "Highlight all matches for previous search pattern", 216128345Stjr } 21760786Sps }, 21860786Sps#endif 21960786Sps { 'h', &h_optname, 22060786Sps NUMBER, -1, &back_scroll, NULL, 221128345Stjr { 222128345Stjr "Backwards scroll limit: ", 223128345Stjr "Backwards scroll limit is %d lines", 224128345Stjr NULL 225128345Stjr } 22660786Sps }, 22760786Sps { 'i', &i_optname, 22860786Sps TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i, 229128345Stjr { 230128345Stjr "Case is significant in searches", 231128345Stjr "Ignore case in searches", 232128345Stjr "Ignore case in searches and in patterns" 233128345Stjr } 23460786Sps }, 23560786Sps { 'j', &j_optname, 236170256Sdelphij STRING, 0, NULL, opt_j, 237128345Stjr { 238128345Stjr "Target line: ", 239170256Sdelphij "0123456789.", 240128345Stjr NULL 241128345Stjr } 24260786Sps }, 24363128Sps { 'J', &J__optname, 24463128Sps BOOL|REPAINT, OPT_OFF, &status_col, NULL, 245128345Stjr { 246128345Stjr "Don't display a status column", 247128345Stjr "Display a status column", 248128345Stjr NULL 249128345Stjr } 25063128Sps }, 25160786Sps#if USERFILE 25260786Sps { 'k', &k_optname, 25360786Sps STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k, 254128345Stjr { NULL, NULL, NULL } 25560786Sps }, 25660786Sps#endif 257161475Sdelphij { 'K', &K__optname, 258161475Sdelphij BOOL, OPT_OFF, &quit_on_intr, NULL, 259161475Sdelphij { 260161475Sdelphij "Interrupt (ctrl-C) returns to prompt", 261161475Sdelphij "Interrupt (ctrl-C) exits less", 262161475Sdelphij NULL 263161475Sdelphij } 264161475Sdelphij }, 26560786Sps { 'l', NULL, 26660786Sps STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_l, 267128345Stjr { NULL, NULL, NULL } 26860786Sps }, 269128345Stjr { 'L', &L__optname, 270128345Stjr BOOL, OPT_ON, &use_lessopen, NULL, 271128345Stjr { 272128345Stjr "Don't use the LESSOPEN filter", 273128345Stjr "Use the LESSOPEN filter", 274128345Stjr NULL 275128345Stjr } 276128345Stjr }, 27760786Sps { 'm', &m_optname, 27860786Sps TRIPLE, OPT_OFF, &pr_type, NULL, 279128345Stjr { 280128345Stjr "Short prompt", 281128345Stjr "Medium prompt", 282128345Stjr "Long prompt" 283128345Stjr } 28460786Sps }, 28560786Sps { 'n', &n_optname, 28660786Sps TRIPLE|REPAINT, OPT_ON, &linenums, NULL, 287128345Stjr { 288128345Stjr "Don't use line numbers", 289128345Stjr "Use line numbers", 290128345Stjr "Constantly display line numbers" 291128345Stjr } 29260786Sps }, 29360786Sps#if LOGFILE 29460786Sps { 'o', &o_optname, 29560786Sps STRING, 0, NULL, opt_o, 296128345Stjr { "log file: ", NULL, NULL } 29760786Sps }, 29860786Sps { 'O', &O__optname, 29960786Sps STRING, 0, NULL, opt__O, 300128345Stjr { "Log file: ", NULL, NULL } 30160786Sps }, 30260786Sps#endif 30360786Sps { 'p', &p_optname, 30460786Sps STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_p, 305128345Stjr { NULL, NULL, NULL } 30660786Sps }, 30760786Sps { 'P', &P__optname, 30860786Sps STRING, 0, NULL, opt__P, 309128345Stjr { "prompt: ", NULL, NULL } 31060786Sps }, 31160786Sps { 'q', &q_optname, 31260786Sps TRIPLE, OPT_OFF, &quiet, NULL, 313128345Stjr { 314128345Stjr "Ring the bell for errors AND at eof/bof", 315128345Stjr "Ring the bell for errors but not at eof/bof", 316128345Stjr "Never ring the bell" 317128345Stjr } 31860786Sps }, 31960786Sps { 'r', &r_optname, 32060786Sps TRIPLE|REPAINT, OPT_OFF, &ctldisp, NULL, 321128345Stjr { 322128345Stjr "Display control characters as ^X", 323128345Stjr "Display control characters directly", 324128345Stjr "Display control characters directly, processing ANSI sequences" 325128345Stjr } 32660786Sps }, 32760786Sps { 's', &s_optname, 32860786Sps BOOL|REPAINT, OPT_OFF, &squeeze, NULL, 329128345Stjr { 330128345Stjr "Display all blank lines", 331128345Stjr "Squeeze multiple blank lines", 332128345Stjr NULL 333128345Stjr } 33460786Sps }, 33560786Sps { 'S', &S__optname, 33660786Sps BOOL|REPAINT, OPT_OFF, &chopline, NULL, 337128345Stjr { 338128345Stjr "Fold long lines", 339128345Stjr "Chop long lines", 340128345Stjr NULL 341128345Stjr } 34260786Sps }, 34360786Sps#if TAGS 34460786Sps { 't', &t_optname, 34560786Sps STRING|NO_QUERY, 0, NULL, opt_t, 346128345Stjr { "tag: ", NULL, NULL } 34760786Sps }, 34860786Sps { 'T', &T__optname, 34960786Sps STRING, 0, NULL, opt__T, 350128345Stjr { "tags file: ", NULL, NULL } 35160786Sps }, 35260786Sps#endif 35360786Sps { 'u', &u_optname, 35460786Sps TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL, 355128345Stjr { 356128345Stjr "Display underlined text in underline mode", 357128345Stjr "Backspaces cause overstrike", 358128345Stjr "Print backspace as ^H" 359128345Stjr } 36060786Sps }, 36160786Sps { 'V', &V__optname, 36260786Sps NOVAR, 0, NULL, opt__V, 363128345Stjr { NULL, NULL, NULL } 36460786Sps }, 36560786Sps { 'w', &w_optname, 36660786Sps TRIPLE|REPAINT, OPT_OFF, &show_attn, NULL, 367128345Stjr { 368128345Stjr "Don't highlight first unread line", 369128345Stjr "Highlight first unread line after forward-screen", 370128345Stjr "Highlight first unread line after any forward movement", 371128345Stjr } 37260786Sps }, 37360786Sps { 'x', &x_optname, 37489019Sps STRING|REPAINT, 0, NULL, opt_x, 375128345Stjr { 376128345Stjr "Tab stops: ", 377128345Stjr "0123456789,", 378128345Stjr NULL 379128345Stjr } 38060786Sps }, 38160786Sps { 'X', &X__optname, 38260786Sps BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL, 383128345Stjr { 384128345Stjr "Send init/deinit strings to terminal", 385128345Stjr "Don't use init/deinit strings", 386128345Stjr NULL 387128345Stjr } 38860786Sps }, 38960786Sps { 'y', &y_optname, 39060786Sps NUMBER, -1, &forw_scroll, NULL, 391128345Stjr { 392128345Stjr "Forward scroll limit: ", 393128345Stjr "Forward scroll limit is %d lines", 394128345Stjr NULL 395128345Stjr } 39660786Sps }, 39760786Sps { 'z', &z_optname, 39860786Sps NUMBER, -1, &swindow, NULL, 399128345Stjr { 400128345Stjr "Scroll window size: ", 401128345Stjr "Scroll window size is %d lines", 402128345Stjr NULL 403128345Stjr } 40460786Sps }, 40560786Sps { '"', "e_optname, 40660786Sps STRING, 0, NULL, opt_quote, 407128345Stjr { "quotes: ", NULL, NULL } 40860786Sps }, 40960786Sps { '~', &tilde_optname, 41060786Sps BOOL|REPAINT, OPT_ON, &twiddle, NULL, 411128345Stjr { 412128345Stjr "Don't show tildes after end of file", 413128345Stjr "Show tildes after end of file", 414128345Stjr NULL 415128345Stjr } 41660786Sps }, 41760786Sps { '?', &query_optname, 41860786Sps NOVAR, 0, NULL, opt_query, 419128345Stjr { NULL, NULL, NULL } 42060786Sps }, 42163128Sps { '#', £_optname, 42263128Sps NUMBER, 0, &shift_count, NULL, 423128345Stjr { 424128345Stjr "Horizontal shift: ", 425128345Stjr "Horizontal shift %d positions", 426128345Stjr NULL 427128345Stjr } 42863128Sps }, 42989019Sps { '.', &keypad_optname, 43089019Sps BOOL|NO_TOGGLE, OPT_OFF, &no_keypad, NULL, 431128345Stjr { 432128345Stjr "Use keypad mode", 433128345Stjr "Don't use keypad mode", 434128345Stjr NULL 435128345Stjr } 43689019Sps }, 437170256Sdelphij { '.', &oldbot_optname, 438170256Sdelphij BOOL, OPT_OFF, &oldbot, NULL, 439170256Sdelphij { 440170256Sdelphij "Use new bottom of screen behavior", 441170256Sdelphij "Use old bottom of screen behavior", 442170256Sdelphij NULL 443170256Sdelphij } 444170256Sdelphij }, 445173682Sdelphij { '.', &follow_optname, 446173682Sdelphij BOOL, FOLLOW_DESC, &follow_mode, NULL, 447173682Sdelphij { 448173682Sdelphij "F command Follows file descriptor", 449173682Sdelphij "F command Follows file name", 450173682Sdelphij NULL 451173682Sdelphij } 452173682Sdelphij }, 453128345Stjr { '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } } 45460786Sps}; 45560786Sps 45660786Sps 45760786Sps/* 45860786Sps * Initialize each option to its default value. 45960786Sps */ 46060786Sps public void 46160786Spsinit_option() 46260786Sps{ 463128345Stjr register struct loption *o; 464161475Sdelphij char *p; 46560786Sps 466161475Sdelphij p = lgetenv("LESS_IS_MORE"); 467161475Sdelphij if (p != NULL && *p != '\0') 468161475Sdelphij less_is_more = 1; 469161475Sdelphij 47060786Sps for (o = option; o->oletter != '\0'; o++) 47160786Sps { 47260786Sps /* 47360786Sps * Set each variable to its default. 47460786Sps */ 47560786Sps if (o->ovar != NULL) 47660786Sps *(o->ovar) = o->odefault; 477128345Stjr if (o->otype & INIT_HANDLER) 478128345Stjr (*(o->ofunc))(INIT, (char *) NULL); 47960786Sps } 48060786Sps} 48160786Sps 48260786Sps/* 48360786Sps * Find an option in the option table, given its option letter. 48460786Sps */ 485128345Stjr public struct loption * 48660786Spsfindopt(c) 48760786Sps int c; 48860786Sps{ 489128345Stjr register struct loption *o; 49060786Sps 49160786Sps for (o = option; o->oletter != '\0'; o++) 49260786Sps { 49360786Sps if (o->oletter == c) 49460786Sps return (o); 495161475Sdelphij if ((o->otype & TRIPLE) && ASCII_TO_UPPER(o->oletter) == c) 49660786Sps return (o); 49760786Sps } 49860786Sps return (NULL); 49960786Sps} 50060786Sps 50160786Sps/* 502128345Stjr * 503128345Stjr */ 504128345Stjr static int 505128345Stjris_optchar(c) 506128345Stjr char c; 507128345Stjr{ 508161475Sdelphij if (ASCII_IS_UPPER(c)) 509128345Stjr return 1; 510161475Sdelphij if (ASCII_IS_LOWER(c)) 511128345Stjr return 1; 512128345Stjr if (c == '-') 513128345Stjr return 1; 514128345Stjr return 0; 515128345Stjr} 516128345Stjr 517128345Stjr/* 51860786Sps * Find an option in the option table, given its option name. 51960786Sps * p_optname is the (possibly partial) name to look for, and 52060786Sps * is updated to point after the matched name. 52160786Sps * p_oname if non-NULL is set to point to the full option name. 52260786Sps */ 523128345Stjr public struct loption * 52460786Spsfindopt_name(p_optname, p_oname, p_err) 52560786Sps char **p_optname; 52660786Sps char **p_oname; 52760786Sps int *p_err; 52860786Sps{ 52960786Sps char *optname = *p_optname; 530128345Stjr register struct loption *o; 53160786Sps register struct optname *oname; 53260786Sps register int len; 53360786Sps int uppercase; 534128345Stjr struct loption *maxo = NULL; 53560786Sps struct optname *maxoname = NULL; 53660786Sps int maxlen = 0; 53760786Sps int ambig = 0; 53860786Sps int exact = 0; 53960786Sps 54060786Sps /* 54160786Sps * Check all options. 54260786Sps */ 54360786Sps for (o = option; o->oletter != '\0'; o++) 54460786Sps { 54560786Sps /* 54660786Sps * Check all names for this option. 54760786Sps */ 54860786Sps for (oname = o->onames; oname != NULL; oname = oname->onext) 54960786Sps { 55060786Sps /* 55160786Sps * Try normal match first (uppercase == 0), 55260786Sps * then, then if it's a TRIPLE option, 55360786Sps * try uppercase match (uppercase == 1). 55460786Sps */ 55560786Sps for (uppercase = 0; uppercase <= 1; uppercase++) 55660786Sps { 55760786Sps len = sprefix(optname, oname->oname, uppercase); 558128345Stjr if (len <= 0 || is_optchar(optname[len])) 559128345Stjr { 560128345Stjr /* 561128345Stjr * We didn't use all of the option name. 562128345Stjr */ 563128345Stjr continue; 564128345Stjr } 56560786Sps if (!exact && len == maxlen) 56660786Sps /* 56760786Sps * Already had a partial match, 56860786Sps * and now there's another one that 56960786Sps * matches the same length. 57060786Sps */ 57160786Sps ambig = 1; 57260786Sps else if (len > maxlen) 57360786Sps { 57460786Sps /* 57560786Sps * Found a better match than 57660786Sps * the one we had. 57760786Sps */ 57860786Sps maxo = o; 57960786Sps maxoname = oname; 58060786Sps maxlen = len; 58160786Sps ambig = 0; 58289019Sps exact = (len == (int)strlen(oname->oname)); 58360786Sps } 58460786Sps if (!(o->otype & TRIPLE)) 58560786Sps break; 58660786Sps } 58760786Sps } 58860786Sps } 58960786Sps if (ambig) 59060786Sps { 59160786Sps /* 59260786Sps * Name matched more than one option. 59360786Sps */ 59460786Sps if (p_err != NULL) 59560786Sps *p_err = OPT_AMBIG; 59660786Sps return (NULL); 59760786Sps } 59860786Sps *p_optname = optname + maxlen; 59960786Sps if (p_oname != NULL) 600128345Stjr *p_oname = maxoname == NULL ? NULL : maxoname->oname; 60160786Sps return (maxo); 60260786Sps} 603