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_at.c,v 10.16 2001/06/25 15:19:14 skimo 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 29 /* 30 * ex_at -- :@[@ | buffer] 31 * :*[* | buffer] 32 * 33 * Execute the contents of the buffer. 34 * 35 * PUBLIC: int ex_at(SCR *, EXCMD *); 36 */ 37 int 38 ex_at(SCR *sp, EXCMD *cmdp) 39 { 40 CB *cbp; 41 CHAR_T name; 42 EXCMD *ecp; 43 RANGE *rp; 44 TEXT *tp; 45 size_t len = 0; 46 CHAR_T *p; 47 48 /* 49 * !!! 50 * Historically, [@*]<carriage-return> and [@*][@*] executed the most 51 * recently executed buffer in ex mode. 52 */ 53 name = FL_ISSET(cmdp->iflags, E_C_BUFFER) ? cmdp->buffer : '@'; 54 if (name == '@' || name == '*') { 55 if (!F_ISSET(sp, SC_AT_SET)) { 56 ex_emsg(sp, NULL, EXM_NOPREVBUF); 57 return (1); 58 } 59 name = sp->at_lbuf; 60 } 61 sp->at_lbuf = name; 62 F_SET(sp, SC_AT_SET); 63 64 CBNAME(sp, cbp, name); 65 if (cbp == NULL) { 66 ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF); 67 return (1); 68 } 69 70 /* 71 * !!! 72 * Historically the @ command took a range of lines, and the @ buffer 73 * was executed once per line. The historic vi could be trashed by 74 * this because it didn't notice if the underlying file changed, or, 75 * for that matter, if there were no more lines on which to operate. 76 * For example, take a 10 line file, load "%delete" into a buffer, 77 * and enter :8,10@<buffer>. 78 * 79 * The solution is a bit tricky. If the user specifies a range, take 80 * the same approach as for global commands, and discard the command 81 * if exit or switch to a new file/screen. If the user doesn't specify 82 * the range, continue to execute after a file/screen switch, which 83 * means @ buffers are still useful in a multi-screen environment. 84 */ 85 CALLOC_RET(sp, ecp, EXCMD *, 1, sizeof(EXCMD)); 86 TAILQ_INIT(ecp->rq); 87 CALLOC_RET(sp, rp, RANGE *, 1, sizeof(RANGE)); 88 rp->start = cmdp->addr1.lno; 89 if (F_ISSET(cmdp, E_ADDR_DEF)) { 90 rp->stop = rp->start; 91 FL_SET(ecp->agv_flags, AGV_AT_NORANGE); 92 } else { 93 rp->stop = cmdp->addr2.lno; 94 FL_SET(ecp->agv_flags, AGV_AT); 95 } 96 TAILQ_INSERT_HEAD(ecp->rq, rp, q); 97 98 /* 99 * Buffers executed in ex mode or from the colon command line in vi 100 * were ex commands. We can't push it on the terminal queue, since 101 * it has to be executed immediately, and we may be in the middle of 102 * an ex command already. Push the command on the ex command stack. 103 * Build two copies of the command. We need two copies because the 104 * ex parser may step on the command string when it's parsing it. 105 */ 106 TAILQ_FOREACH_REVERSE(tp, cbp->textq, _texth, q) 107 len += tp->len + 1; 108 109 MALLOC_RET(sp, ecp->cp, CHAR_T *, len * 2 * sizeof(CHAR_T)); 110 ecp->o_cp = ecp->cp; 111 ecp->o_clen = len; 112 ecp->cp[len] = '\0'; 113 114 /* Copy the buffer into the command space. */ 115 p = ecp->cp + len; 116 TAILQ_FOREACH_REVERSE(tp, cbp->textq, _texth, q) { 117 MEMCPY(p, tp->lb, tp->len); 118 p += tp->len; 119 *p++ = '\n'; 120 } 121 122 SLIST_INSERT_HEAD(sp->gp->ecq, ecp, q); 123 return (0); 124 } 125