119304Speter/*- 219304Speter * Copyright (c) 1992, 1993, 1994 319304Speter * The Regents of the University of California. All rights reserved. 419304Speter * Copyright (c) 1992, 1993, 1994, 1995, 1996 519304Speter * Keith Bostic. All rights reserved. 619304Speter * 719304Speter * See the LICENSE file for redistribution information. 819304Speter */ 919304Speter 1019304Speter#include "config.h" 1119304Speter 1219304Speter#ifndef lint 13254225Speterstatic const char sccsid[] = "$Id: cut.c,v 10.12 2012/02/11 15:52:33 zy Exp $"; 1419304Speter#endif /* not lint */ 1519304Speter 1619304Speter#include <sys/types.h> 1719304Speter#include <sys/queue.h> 1819304Speter 1919304Speter#include <bitstring.h> 2019304Speter#include <ctype.h> 2119304Speter#include <errno.h> 2219304Speter#include <fcntl.h> 2319304Speter#include <limits.h> 2419304Speter#include <stdio.h> 2519304Speter#include <stdlib.h> 2619304Speter#include <string.h> 2719304Speter 2819304Speter#include "common.h" 2919304Speter 3019304Speterstatic void cb_rotate __P((SCR *)); 3119304Speter 3219304Speter/* 3319304Speter * cut -- 3419304Speter * Put a range of lines/columns into a TEXT buffer. 3519304Speter * 3619304Speter * There are two buffer areas, both found in the global structure. The first 3719304Speter * is the linked list of all the buffers the user has named, the second is the 3819304Speter * unnamed buffer storage. There is a pointer, too, which is the current 3919304Speter * default buffer, i.e. it may point to the unnamed buffer or a named buffer 4019304Speter * depending on into what buffer the last text was cut. Logically, in both 4119304Speter * delete and yank operations, if the user names a buffer, the text is cut 4219304Speter * into it. If it's a delete of information on more than a single line, the 4319304Speter * contents of the numbered buffers are rotated up one, the contents of the 4419304Speter * buffer named '9' are discarded, and the text is cut into the buffer named 4519304Speter * '1'. The text is always cut into the unnamed buffer. 4619304Speter * 4719304Speter * In all cases, upper-case buffer names are the same as lower-case names, 4819304Speter * with the exception that they cause the buffer to be appended to instead 4919304Speter * of replaced. Note, however, that if text is appended to a buffer, the 5019304Speter * default buffer only contains the appended text, not the entire contents 5119304Speter * of the buffer. 5219304Speter * 5319304Speter * !!! 5419304Speter * The contents of the default buffer would disappear after most operations 5519304Speter * in historic vi. It's unclear that this is useful, so we don't bother. 5619304Speter * 5719304Speter * When users explicitly cut text into the numeric buffers, historic vi became 5819304Speter * genuinely strange. I've never been able to figure out what was supposed to 5919304Speter * happen. It behaved differently if you deleted text than if you yanked text, 6019304Speter * and, in the latter case, the text was appended to the buffer instead of 6119304Speter * replacing the contents. Hopefully it's not worth getting right, and here 6219304Speter * we just treat the numeric buffers like any other named buffer. 6319304Speter * 6419304Speter * PUBLIC: int cut __P((SCR *, CHAR_T *, MARK *, MARK *, int)); 6519304Speter */ 6619304Speterint 67254225Spetercut( 68254225Speter SCR *sp, 69254225Speter CHAR_T *namep, 70254225Speter MARK *fm, 71254225Speter MARK *tm, 72254225Speter int flags) 7319304Speter{ 7419304Speter CB *cbp; 75254225Speter CHAR_T name = '\0'; 7619304Speter recno_t lno; 7719304Speter int append, copy_one, copy_def; 7819304Speter 7919304Speter /* 8019304Speter * If the user specified a buffer, put it there. (This may require 8119304Speter * a copy into the numeric buffers. We do the copy so that we don't 8219304Speter * have to reference count and so we don't have to deal with things 8319304Speter * like appends to buffers that are used multiple times.) 8419304Speter * 8519304Speter * Otherwise, if it's supposed to be put in a numeric buffer (usually 8619304Speter * a delete) put it there. The rules for putting things in numeric 8719304Speter * buffers were historically a little strange. There were three cases. 8819304Speter * 8919304Speter * 1: Some motions are always line mode motions, which means 9019304Speter * that the cut always goes into the numeric buffers. 9119304Speter * 2: Some motions aren't line mode motions, e.g. d10w, but 9219304Speter * can cross line boundaries. For these commands, if the 9319304Speter * cut crosses a line boundary, it goes into the numeric 9419304Speter * buffers. This includes most of the commands. 9519304Speter * 3: Some motions aren't line mode motions, e.g. d`<char>, 9619304Speter * but always go into the numeric buffers, regardless. This 9719304Speter * was the commands: % ` / ? ( ) N n { } -- and nvi adds ^A. 9819304Speter * 9919304Speter * Otherwise, put it in the unnamed buffer. 10019304Speter */ 10119304Speter append = copy_one = copy_def = 0; 10219304Speter if (namep != NULL) { 10319304Speter name = *namep; 104254225Speter if (LF_ISSET(CUT_NUMREQ) || (LF_ISSET(CUT_NUMOPT) && 105254225Speter (LF_ISSET(CUT_LINEMODE) || fm->lno != tm->lno))) { 10619304Speter copy_one = 1; 10719304Speter cb_rotate(sp); 10819304Speter } 109254225Speter if ((append = isupper(name))) { 11019304Speter if (!copy_one) 11119304Speter copy_def = 1; 11219304Speter name = tolower(name); 11319304Speter } 11419304Speternamecb: CBNAME(sp, cbp, name); 115254225Speter } else if (LF_ISSET(CUT_NUMREQ) || (LF_ISSET(CUT_NUMOPT) && 116254225Speter (LF_ISSET(CUT_LINEMODE) || fm->lno != tm->lno))) { 11719304Speter name = '1'; 11819304Speter cb_rotate(sp); 11919304Speter goto namecb; 12019304Speter } else 12119304Speter cbp = &sp->gp->dcb_store; 12219304Speter 12319304Spetercopyloop: 12419304Speter /* 12519304Speter * If this is a new buffer, create it and add it into the list. 12619304Speter * Otherwise, if it's not an append, free its current contents. 12719304Speter */ 12819304Speter if (cbp == NULL) { 12919304Speter CALLOC_RET(sp, cbp, CB *, 1, sizeof(CB)); 13019304Speter cbp->name = name; 131254225Speter TAILQ_INIT(cbp->textq); 132254225Speter SLIST_INSERT_HEAD(sp->gp->cutq, cbp, q); 13319304Speter } else if (!append) { 134254225Speter text_lfree(cbp->textq); 13519304Speter cbp->len = 0; 13619304Speter cbp->flags = 0; 13719304Speter } 13819304Speter 13919304Speter 14019304Speter /* In line mode, it's pretty easy, just cut the lines. */ 14119304Speter if (LF_ISSET(CUT_LINEMODE)) { 14219304Speter cbp->flags |= CB_LMODE; 14319304Speter for (lno = fm->lno; lno <= tm->lno; ++lno) 144254225Speter if (cut_line(sp, lno, 0, ENTIRE_LINE, cbp)) 14519304Speter goto cut_line_err; 14619304Speter } else { 14719304Speter /* 148254225Speter * Get the first line. A length of ENTIRE_LINE causes 149254225Speter * cut_line to cut from the MARK to the end of the line. 15019304Speter */ 15119304Speter if (cut_line(sp, fm->lno, fm->cno, fm->lno != tm->lno ? 15219304Speter ENTIRE_LINE : (tm->cno - fm->cno) + 1, cbp)) 15319304Speter goto cut_line_err; 15419304Speter 15519304Speter /* Get the intermediate lines. */ 15619304Speter for (lno = fm->lno; ++lno < tm->lno;) 15719304Speter if (cut_line(sp, lno, 0, ENTIRE_LINE, cbp)) 15819304Speter goto cut_line_err; 15919304Speter 16019304Speter /* Get the last line. */ 16119304Speter if (tm->lno != fm->lno && 16219304Speter cut_line(sp, lno, 0, tm->cno + 1, cbp)) 16319304Speter goto cut_line_err; 16419304Speter } 16519304Speter 16619304Speter append = 0; /* Only append to the named buffer. */ 16719304Speter sp->gp->dcbp = cbp; /* Repoint the default buffer on each pass. */ 16819304Speter 16919304Speter if (copy_one) { /* Copy into numeric buffer 1. */ 17019304Speter name = '1'; 17119304Speter CBNAME(sp, cbp, name); 17219304Speter copy_one = 0; 17319304Speter goto copyloop; 17419304Speter } 17519304Speter if (copy_def) { /* Copy into the default buffer. */ 17619304Speter cbp = &sp->gp->dcb_store; 17719304Speter copy_def = 0; 17819304Speter goto copyloop; 17919304Speter } 18019304Speter return (0); 18119304Speter 18219304Spetercut_line_err: 183254225Speter text_lfree(cbp->textq); 18419304Speter cbp->len = 0; 18519304Speter cbp->flags = 0; 18619304Speter return (1); 18719304Speter} 18819304Speter 18919304Speter/* 19019304Speter * cb_rotate -- 19119304Speter * Rotate the numbered buffers up one. 19219304Speter */ 19319304Speterstatic void 194254225Spetercb_rotate(SCR *sp) 19519304Speter{ 196254225Speter CB *cbp, *del_cbp = NULL, *pre_cbp = NULL; 19719304Speter 198254225Speter SLIST_FOREACH(cbp, sp->gp->cutq, q) { 19919304Speter switch(cbp->name) { 200254225Speter case '1': case '2': case '3': 201254225Speter case '4': case '5': case '6': 202254225Speter case '7': case '8': 203254225Speter cbp->name += 1; 20419304Speter break; 20519304Speter case '9': 206254225Speter if (cbp == SLIST_FIRST(sp->gp->cutq)) 207254225Speter SLIST_REMOVE_HEAD(sp->gp->cutq, q); 208254225Speter else 209254225Speter SLIST_REMOVE_AFTER(pre_cbp, q); 21019304Speter del_cbp = cbp; 21119304Speter break; 21219304Speter } 213254225Speter pre_cbp = cbp; 214254225Speter } 21519304Speter if (del_cbp != NULL) { 216254225Speter text_lfree(del_cbp->textq); 21719304Speter free(del_cbp); 21819304Speter } 21919304Speter} 22019304Speter 22119304Speter/* 22219304Speter * cut_line -- 22319304Speter * Cut a portion of a single line. 22419304Speter * 22519304Speter * PUBLIC: int cut_line __P((SCR *, recno_t, size_t, size_t, CB *)); 22619304Speter */ 22719304Speterint 228254225Spetercut_line( 229254225Speter SCR *sp, 230254225Speter recno_t lno, 231254225Speter size_t fcno, 232254225Speter size_t clen, 233254225Speter CB *cbp) 23419304Speter{ 23519304Speter TEXT *tp; 23619304Speter size_t len; 237254225Speter CHAR_T *p; 23819304Speter 23919304Speter /* Get the line. */ 24019304Speter if (db_get(sp, lno, DBG_FATAL, &p, &len)) 24119304Speter return (1); 24219304Speter 24319304Speter /* Create a TEXT structure that can hold the entire line. */ 24419304Speter if ((tp = text_init(sp, NULL, 0, len)) == NULL) 24519304Speter return (1); 24619304Speter 24719304Speter /* 24819304Speter * If the line isn't empty and it's not the entire line, 24919304Speter * copy the portion we want, and reset the TEXT length. 25019304Speter */ 25119304Speter if (len != 0) { 252254225Speter if (clen == ENTIRE_LINE) 25319304Speter clen = len - fcno; 254254225Speter MEMCPY(tp->lb, p + fcno, clen); 25519304Speter tp->len = clen; 25619304Speter } 25719304Speter 25819304Speter /* Append to the end of the cut buffer. */ 259254225Speter TAILQ_INSERT_TAIL(cbp->textq, tp, q); 26019304Speter cbp->len += tp->len; 26119304Speter 26219304Speter return (0); 26319304Speter} 26419304Speter 26519304Speter/* 26619304Speter * cut_close -- 26719304Speter * Discard all cut buffers. 26819304Speter * 26919304Speter * PUBLIC: void cut_close __P((GS *)); 27019304Speter */ 27119304Spetervoid 272254225Spetercut_close(GS *gp) 27319304Speter{ 27419304Speter CB *cbp; 27519304Speter 27619304Speter /* Free cut buffer list. */ 277254225Speter while ((cbp = SLIST_FIRST(gp->cutq)) != NULL) { 278254225Speter if (!TAILQ_EMPTY(cbp->textq)) 279254225Speter text_lfree(cbp->textq); 280254225Speter SLIST_REMOVE_HEAD(gp->cutq, q); 28119304Speter free(cbp); 28219304Speter } 28319304Speter 28419304Speter /* Free default cut storage. */ 28519304Speter cbp = &gp->dcb_store; 286254225Speter if (!TAILQ_EMPTY(cbp->textq)) 287254225Speter text_lfree(cbp->textq); 28819304Speter} 28919304Speter 29019304Speter/* 29119304Speter * text_init -- 29219304Speter * Allocate a new TEXT structure. 29319304Speter * 294254225Speter * PUBLIC: TEXT *text_init __P((SCR *, const CHAR_T *, size_t, size_t)); 29519304Speter */ 29619304SpeterTEXT * 297254225Spetertext_init( 298254225Speter SCR *sp, 299254225Speter const CHAR_T *p, 300254225Speter size_t len, 301254225Speter size_t total_len) 30219304Speter{ 30319304Speter TEXT *tp; 30419304Speter 30519304Speter CALLOC(sp, tp, TEXT *, 1, sizeof(TEXT)); 30619304Speter if (tp == NULL) 30719304Speter return (NULL); 30819304Speter /* ANSI C doesn't define a call to malloc(3) for 0 bytes. */ 309254225Speter if ((tp->lb_len = total_len * sizeof(CHAR_T)) != 0) { 31019304Speter MALLOC(sp, tp->lb, CHAR_T *, tp->lb_len); 31119304Speter if (tp->lb == NULL) { 31219304Speter free(tp); 31319304Speter return (NULL); 31419304Speter } 31519304Speter if (p != NULL && len != 0) 316254225Speter MEMCPY(tp->lb, p, len); 31719304Speter } 31819304Speter tp->len = len; 31919304Speter return (tp); 32019304Speter} 32119304Speter 32219304Speter/* 32319304Speter * text_lfree -- 32419304Speter * Free a chain of text structures. 32519304Speter * 32619304Speter * PUBLIC: void text_lfree __P((TEXTH *)); 32719304Speter */ 32819304Spetervoid 329254225Spetertext_lfree(TEXTH *headp) 33019304Speter{ 33119304Speter TEXT *tp; 33219304Speter 333254225Speter while ((tp = TAILQ_FIRST(headp)) != NULL) { 334254225Speter TAILQ_REMOVE(headp, tp, q); 33519304Speter text_free(tp); 33619304Speter } 33719304Speter} 33819304Speter 33919304Speter/* 34019304Speter * text_free -- 34119304Speter * Free a text structure. 34219304Speter * 34319304Speter * PUBLIC: void text_free __P((TEXT *)); 34419304Speter */ 34519304Spetervoid 346254225Spetertext_free(TEXT *tp) 34719304Speter{ 34819304Speter if (tp->lb != NULL) 34919304Speter free(tp->lb); 35019304Speter free(tp); 35119304Speter} 352