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 <ctype.h> 18 #include <limits.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 23 #include "../common/common.h" 24 25 /* 26 * ex_at -- :@[@ | buffer] 27 * :*[* | buffer] 28 * 29 * Execute the contents of the buffer. 30 * 31 * PUBLIC: int ex_at(SCR *, EXCMD *); 32 */ 33 int 34 ex_at(SCR *sp, EXCMD *cmdp) 35 { 36 CB *cbp; 37 CHAR_T name; 38 EXCMD *ecp; 39 RANGE *rp; 40 TEXT *tp; 41 size_t len = 0; 42 CHAR_T *p; 43 44 /* 45 * !!! 46 * Historically, [@*]<carriage-return> and [@*][@*] executed the most 47 * recently executed buffer in ex mode. 48 */ 49 name = FL_ISSET(cmdp->iflags, E_C_BUFFER) ? cmdp->buffer : '@'; 50 if (name == '@' || name == '*') { 51 if (!F_ISSET(sp, SC_AT_SET)) { 52 ex_emsg(sp, NULL, EXM_NOPREVBUF); 53 return (1); 54 } 55 name = sp->at_lbuf; 56 } 57 sp->at_lbuf = name; 58 F_SET(sp, SC_AT_SET); 59 60 CBNAME(sp, cbp, name); 61 if (cbp == NULL) { 62 ex_emsg(sp, KEY_NAME(sp, name), EXM_EMPTYBUF); 63 return (1); 64 } 65 66 /* 67 * !!! 68 * Historically the @ command took a range of lines, and the @ buffer 69 * was executed once per line. The historic vi could be trashed by 70 * this because it didn't notice if the underlying file changed, or, 71 * for that matter, if there were no more lines on which to operate. 72 * For example, take a 10 line file, load "%delete" into a buffer, 73 * and enter :8,10@<buffer>. 74 * 75 * The solution is a bit tricky. If the user specifies a range, take 76 * the same approach as for global commands, and discard the command 77 * if exit or switch to a new file/screen. If the user doesn't specify 78 * the range, continue to execute after a file/screen switch, which 79 * means @ buffers are still useful in a multi-screen environment. 80 */ 81 CALLOC_RET(sp, ecp, 1, sizeof(EXCMD)); 82 TAILQ_INIT(ecp->rq); 83 CALLOC_RET(sp, rp, 1, sizeof(RANGE)); 84 rp->start = cmdp->addr1.lno; 85 if (F_ISSET(cmdp, E_ADDR_DEF)) { 86 rp->stop = rp->start; 87 FL_SET(ecp->agv_flags, AGV_AT_NORANGE); 88 } else { 89 rp->stop = cmdp->addr2.lno; 90 FL_SET(ecp->agv_flags, AGV_AT); 91 } 92 TAILQ_INSERT_HEAD(ecp->rq, rp, q); 93 94 /* 95 * Buffers executed in ex mode or from the colon command line in vi 96 * were ex commands. We can't push it on the terminal queue, since 97 * it has to be executed immediately, and we may be in the middle of 98 * an ex command already. Push the command on the ex command stack. 99 * Build two copies of the command. We need two copies because the 100 * ex parser may step on the command string when it's parsing it. 101 */ 102 TAILQ_FOREACH_REVERSE(tp, cbp->textq, _texth, q) 103 len += tp->len + 1; 104 105 MALLOC_RET(sp, ecp->cp, len * 2 * sizeof(CHAR_T)); 106 ecp->o_cp = ecp->cp; 107 ecp->o_clen = len; 108 ecp->cp[len] = '\0'; 109 110 /* Copy the buffer into the command space. */ 111 p = ecp->cp + len; 112 TAILQ_FOREACH_REVERSE(tp, cbp->textq, _texth, q) { 113 MEMCPY(p, tp->lb, tp->len); 114 p += tp->len; 115 *p++ = '\n'; 116 } 117 118 SLIST_INSERT_HEAD(sp->gp->ecq, ecp, q); 119 return (0); 120 } 121