1 /*- 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * Copyright (c) 1992, 1993, 1994, 1995, 1996 5 * Keith Bostic. All rights reserved. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "$Id: ex_usage.c,v 10.16 2011/12/21 19:26:48 zy Exp $"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <ctype.h> 22 #include <limits.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 #include "../common/common.h" 28 #include "../vi/vi.h" 29 30 /* 31 * ex_help -- :help 32 * Display help message. 33 * 34 * PUBLIC: int ex_help(SCR *, EXCMD *); 35 */ 36 int 37 ex_help(SCR *sp, EXCMD *cmdp) 38 { 39 (void)ex_puts(sp, 40 "To see the list of vi commands, enter \":viusage<CR>\"\n"); 41 (void)ex_puts(sp, 42 "To see the list of ex commands, enter \":exusage<CR>\"\n"); 43 (void)ex_puts(sp, 44 "For an ex command usage statement enter \":exusage [cmd]<CR>\"\n"); 45 (void)ex_puts(sp, 46 "For a vi key usage statement enter \":viusage [key]<CR>\"\n"); 47 (void)ex_puts(sp, "To exit, enter \":q!\"\n"); 48 return (0); 49 } 50 51 /* 52 * ex_usage -- :exusage [cmd] 53 * Display ex usage strings. 54 * 55 * PUBLIC: int ex_usage(SCR *, EXCMD *); 56 */ 57 int 58 ex_usage(SCR *sp, EXCMD *cmdp) 59 { 60 ARGS *ap; 61 EXCMDLIST const *cp; 62 int newscreen; 63 CHAR_T *name, *p, nb[MAXCMDNAMELEN + 5]; 64 65 switch (cmdp->argc) { 66 case 1: 67 ap = cmdp->argv[0]; 68 if (ISUPPER(ap->bp[0])) { 69 newscreen = 1; 70 ap->bp[0] = TOLOWER(ap->bp[0]); 71 } else 72 newscreen = 0; 73 for (cp = cmds; cp->name != NULL && 74 MEMCMP(ap->bp, cp->name, ap->len); ++cp); 75 if (cp->name == NULL || 76 (newscreen && !F_ISSET(cp, E_NEWSCREEN))) { 77 if (newscreen) 78 ap->bp[0] = TOUPPER(ap->bp[0]); 79 (void)ex_printf(sp, "The "WVS" command is unknown\n", 80 (int)ap->len, ap->bp); 81 } else { 82 (void)ex_printf(sp, 83 "Command: %s\n Usage: %s\n", cp->help, cp->usage); 84 /* 85 * !!! 86 * The "visual" command has two modes, one from ex, 87 * one from the vi colon line. Don't ask. 88 */ 89 if (cp != &cmds[C_VISUAL_EX] && 90 cp != &cmds[C_VISUAL_VI]) 91 break; 92 if (cp == &cmds[C_VISUAL_EX]) 93 cp = &cmds[C_VISUAL_VI]; 94 else 95 cp = &cmds[C_VISUAL_EX]; 96 (void)ex_printf(sp, 97 "Command: %s\n Usage: %s\n", cp->help, cp->usage); 98 } 99 break; 100 case 0: 101 for (cp = cmds; cp->name != NULL && !INTERRUPTED(sp); ++cp) { 102 /* 103 * The ^D command has an unprintable name. 104 * 105 * XXX 106 * We display both capital and lower-case versions of 107 * the appropriate commands -- no need to add in extra 108 * room, they're all short names. 109 */ 110 if (cp == &cmds[C_SCROLL]) 111 name = L("^D"); 112 else if (F_ISSET(cp, E_NEWSCREEN)) { 113 nb[0] = '['; 114 nb[1] = TOUPPER(cp->name[0]); 115 nb[2] = cp->name[0]; 116 nb[3] = ']'; 117 for (name = cp->name + 1, 118 p = nb + 4; (*p++ = *name++) != '\0';); 119 name = nb; 120 } else 121 name = cp->name; 122 (void)ex_printf(sp, 123 WVS": %s\n", MAXCMDNAMELEN, name, cp->help); 124 } 125 break; 126 default: 127 abort(); 128 } 129 return (0); 130 } 131 132 /* 133 * ex_viusage -- :viusage [key] 134 * Display vi usage strings. 135 * 136 * PUBLIC: int ex_viusage(SCR *, EXCMD *); 137 */ 138 int 139 ex_viusage(SCR *sp, EXCMD *cmdp) 140 { 141 GS *gp; 142 VIKEYS const *kp; 143 int key; 144 145 gp = sp->gp; 146 switch (cmdp->argc) { 147 case 1: 148 if (cmdp->argv[0]->len != 1) { 149 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE); 150 return (1); 151 } 152 key = cmdp->argv[0]->bp[0]; 153 if (key > MAXVIKEY) 154 goto nokey; 155 156 /* Special case: '[' and ']' commands. */ 157 if ((key == '[' || key == ']') && cmdp->argv[0]->bp[1] != key) 158 goto nokey; 159 160 /* Special case: ~ command. */ 161 if (key == '~' && O_ISSET(sp, O_TILDEOP)) 162 kp = &tmotion; 163 else 164 kp = &vikeys[key]; 165 166 if (kp->usage == NULL) 167 nokey: (void)ex_printf(sp, 168 "The %s key has no current meaning\n", 169 KEY_NAME(sp, key)); 170 else 171 (void)ex_printf(sp, 172 " Key:%s%s\nUsage: %s\n", 173 isblank(*kp->help) ? "" : " ", kp->help, kp->usage); 174 break; 175 case 0: 176 for (key = 0; key <= MAXVIKEY && !INTERRUPTED(sp); ++key) { 177 /* Special case: ~ command. */ 178 if (key == '~' && O_ISSET(sp, O_TILDEOP)) 179 kp = &tmotion; 180 else 181 kp = &vikeys[key]; 182 if (kp->help != NULL) 183 (void)ex_printf(sp, "%s\n", kp->help); 184 } 185 break; 186 default: 187 abort(); 188 } 189 return (0); 190 } 191