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 #include <sys/types.h> 13 #include <sys/queue.h> 14 #include <sys/time.h> 15 16 #include <bitstring.h> 17 #include <errno.h> 18 #include <limits.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 23 #include "../common/common.h" 24 #include "../vi/vi.h" 25 26 static int ex_N_edit(SCR *, EXCMD *, FREF *, int); 27 28 /* 29 * ex_edit -- :e[dit][!] [+cmd] [file] 30 * :ex[!] [+cmd] [file] 31 * :vi[sual][!] [+cmd] [file] 32 * 33 * Edit a file; if none specified, re-edit the current file. The third 34 * form of the command can only be executed while in vi mode. See the 35 * hack in ex.c:ex_cmd(). 36 * 37 * !!! 38 * Historic vi didn't permit the '+' command form without specifying 39 * a file name as well. This seems unreasonable, so we support it 40 * regardless. 41 * 42 * PUBLIC: int ex_edit(SCR *, EXCMD *); 43 */ 44 int 45 ex_edit(SCR *sp, EXCMD *cmdp) 46 { 47 FREF *frp; 48 int attach, setalt; 49 char *np; 50 size_t nlen; 51 52 switch (cmdp->argc) { 53 case 0: 54 /* 55 * If the name has been changed, we edit that file, not the 56 * original name. If the user was editing a temporary file 57 * (or wasn't editing any file), create another one. The 58 * reason for not reusing temporary files is that there is 59 * special exit processing of them, and reuse is tricky. 60 */ 61 frp = sp->frp; 62 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) { 63 if ((frp = file_add(sp, NULL)) == NULL) 64 return (1); 65 attach = 0; 66 } else 67 attach = 1; 68 setalt = 0; 69 break; 70 case 1: 71 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, 72 np, nlen); 73 if ((frp = file_add(sp, np)) == NULL) 74 return (1); 75 attach = 0; 76 setalt = 1; 77 set_alt_name(sp, np); 78 break; 79 default: 80 abort(); 81 } 82 83 if (F_ISSET(cmdp, E_NEWSCREEN) || cmdp->cmd == &cmds[C_VSPLIT]) 84 return (ex_N_edit(sp, cmdp, frp, attach)); 85 86 /* 87 * Check for modifications. 88 * 89 * !!! 90 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit. 91 */ 92 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE))) 93 return (1); 94 95 /* Switch files. */ 96 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) | 97 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) 98 return (1); 99 100 F_SET(sp, SC_FSWITCH); 101 return (0); 102 } 103 104 /* 105 * ex_N_edit -- 106 * New screen version of ex_edit. 107 */ 108 static int 109 ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach) 110 { 111 SCR *new; 112 113 /* Get a new screen. */ 114 if (screen_init(sp->gp, sp, &new)) 115 return (1); 116 if ((cmdp->cmd == &cmds[C_VSPLIT] && vs_vsplit(sp, new)) || 117 (cmdp->cmd != &cmds[C_VSPLIT] && vs_split(sp, new, 0))) { 118 (void)screen_end(new); 119 return (1); 120 } 121 122 /* Get a backing file. */ 123 if (attach) { 124 /* Copy file state, keep the screen and cursor the same. */ 125 new->ep = sp->ep; 126 ++new->ep->refcnt; 127 128 new->frp = frp; 129 new->frp->flags = sp->frp->flags; 130 131 new->lno = sp->lno; 132 new->cno = sp->cno; 133 134 #if defined(USE_WIDECHAR) && defined(USE_ICONV) 135 /* Synchronize the iconv environments. */ 136 o_set(new, O_FILEENCODING, OS_STRDUP, 137 O_STR(sp, O_FILEENCODING), 0); 138 conv_enc(new, O_FILEENCODING, 0); 139 #endif 140 } else if (file_init(new, frp, NULL, 141 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) { 142 (void)vs_discard(new, NULL); 143 (void)screen_end(new); 144 return (1); 145 } 146 147 /* Create the argument list. */ 148 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name); 149 150 /* Set up the switch. */ 151 sp->nextdisp = new; 152 F_SET(sp, SC_SSWITCH); 153 154 return (0); 155 } 156