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Diffstat (limited to 'chared.c')
| -rw-r--r-- | chared.c | 777 |
1 files changed, 777 insertions, 0 deletions
diff --git a/chared.c b/chared.c new file mode 100644 index 0000000..4d9bdae --- /dev/null +++ b/chared.c @@ -0,0 +1,777 @@ +/* $NetBSD: chared.c,v 1.25 2005/08/08 01:41:30 christos Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Christos Zoulas of Cornell University. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "config.h" +#if !defined(lint) && !defined(SCCSID) +#if 0 +static char sccsid[] = "@(#)chared.c 8.1 (Berkeley) 6/4/93"; +#else +__RCSID("$NetBSD: chared.c,v 1.25 2005/08/08 01:41:30 christos Exp $"); +#endif +#endif /* not lint && not SCCSID */ + +/* + * chared.c: Character editor utilities + */ +#include <stdlib.h> +#include "el.h" + +private void ch__clearmacro __P((EditLine *)); + +/* value to leave unused in line buffer */ +#define EL_LEAVE 2 + +/* cv_undo(): + * Handle state for the vi undo command + */ +protected void +cv_undo(EditLine *el) +{ + c_undo_t *vu = &el->el_chared.c_undo; + c_redo_t *r = &el->el_chared.c_redo; + unsigned int size; + + /* Save entire line for undo */ + size = el->el_line.lastchar - el->el_line.buffer; + vu->len = size; + vu->cursor = el->el_line.cursor - el->el_line.buffer; + memcpy(vu->buf, el->el_line.buffer, size); + + /* save command info for redo */ + r->count = el->el_state.doingarg ? el->el_state.argument : 0; + r->action = el->el_chared.c_vcmd.action; + r->pos = r->buf; + r->cmd = el->el_state.thiscmd; + r->ch = el->el_state.thisch; +} + +/* cv_yank(): + * Save yank/delete data for paste + */ +protected void +cv_yank(EditLine *el, const char *ptr, int size) +{ + c_kill_t *k = &el->el_chared.c_kill; + + memcpy(k->buf, ptr, size +0u); + k->last = k->buf + size; +} + + +/* c_insert(): + * Insert num characters + */ +protected void +c_insert(EditLine *el, int num) +{ + char *cp; + + if (el->el_line.lastchar + num >= el->el_line.limit) { + if (!ch_enlargebufs(el, num +0u)) + return; /* can't go past end of buffer */ + } + + if (el->el_line.cursor < el->el_line.lastchar) { + /* if I must move chars */ + for (cp = el->el_line.lastchar; cp >= el->el_line.cursor; cp--) + cp[num] = *cp; + } + el->el_line.lastchar += num; +} + + +/* c_delafter(): + * Delete num characters after the cursor + */ +protected void +c_delafter(EditLine *el, int num) +{ + + if (el->el_line.cursor + num > el->el_line.lastchar) + num = el->el_line.lastchar - el->el_line.cursor; + + if (el->el_map.current != el->el_map.emacs) { + cv_undo(el); + cv_yank(el, el->el_line.cursor, num); + } + + if (num > 0) { + char *cp; + + for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) + *cp = cp[num]; + + el->el_line.lastchar -= num; + } +} + + +/* c_delafter1(): + * Delete the character after the cursor, do not yank + */ +protected void +c_delafter1(EditLine *el) +{ + char *cp; + + for (cp = el->el_line.cursor; cp <= el->el_line.lastchar; cp++) + *cp = cp[1]; + + el->el_line.lastchar--; +} + + +/* c_delbefore(): + * Delete num characters before the cursor + */ +protected void +c_delbefore(EditLine *el, int num) +{ + + if (el->el_line.cursor - num < el->el_line.buffer) + num = el->el_line.cursor - el->el_line.buffer; + + if (el->el_map.current != el->el_map.emacs) { + cv_undo(el); + cv_yank(el, el->el_line.cursor - num, num); + } + + if (num > 0) { + char *cp; + + for (cp = el->el_line.cursor - num; + cp <= el->el_line.lastchar; + cp++) + *cp = cp[num]; + + el->el_line.lastchar -= num; + } +} + + +/* c_delbefore1(): + * Delete the character before the cursor, do not yank + */ +protected void +c_delbefore1(EditLine *el) +{ + char *cp; + + for (cp = el->el_line.cursor - 1; cp <= el->el_line.lastchar; cp++) + *cp = cp[1]; + + el->el_line.lastchar--; +} + + +/* ce__isword(): + * Return if p is part of a word according to emacs + */ +protected int +ce__isword(int p) +{ + return (isalnum(p) || strchr("*?_-.[]~=", p) != NULL); +} + + +/* cv__isword(): + * Return if p is part of a word according to vi + */ +protected int +cv__isword(int p) +{ + if (isalnum(p) || p == '_') + return 1; + if (isgraph(p)) + return 2; + return 0; +} + + +/* cv__isWord(): + * Return if p is part of a big word according to vi + */ +protected int +cv__isWord(int p) +{ + return (!isspace(p)); +} + + +/* c__prev_word(): + * Find the previous word + */ +protected char * +c__prev_word(char *p, char *low, int n, int (*wtest)(int)) +{ + p--; + + while (n--) { + while ((p >= low) && !(*wtest)((unsigned char) *p)) + p--; + while ((p >= low) && (*wtest)((unsigned char) *p)) + p--; + } + + /* cp now points to one character before the word */ + p++; + if (p < low) + p = low; + /* cp now points where we want it */ + return (p); +} + + +/* c__next_word(): + * Find the next word + */ +protected char * +c__next_word(char *p, char *high, int n, int (*wtest)(int)) +{ + while (n--) { + while ((p < high) && !(*wtest)((unsigned char) *p)) + p++; + while ((p < high) && (*wtest)((unsigned char) *p)) + p++; + } + if (p > high) + p = high; + /* p now points where we want it */ + return (p); +} + +/* cv_next_word(): + * Find the next word vi style + */ +protected char * +cv_next_word(EditLine *el, char *p, char *high, int n, int (*wtest)(int)) +{ + int test; + + while (n--) { + test = (*wtest)((unsigned char) *p); + while ((p < high) && (*wtest)((unsigned char) *p) == test) + p++; + /* + * vi historically deletes with cw only the word preserving the + * trailing whitespace! This is not what 'w' does.. + */ + if (n || el->el_chared.c_vcmd.action != (DELETE|INSERT)) + while ((p < high) && isspace((unsigned char) *p)) + p++; + } + + /* p now points where we want it */ + if (p > high) + return (high); + else + return (p); +} + + +/* cv_prev_word(): + * Find the previous word vi style + */ +protected char * +cv_prev_word(char *p, char *low, int n, int (*wtest)(int)) +{ + int test; + + p--; + while (n--) { + while ((p > low) && isspace((unsigned char) *p)) + p--; + test = (*wtest)((unsigned char) *p); + while ((p >= low) && (*wtest)((unsigned char) *p) == test) + p--; + } + p++; + + /* p now points where we want it */ + if (p < low) + return (low); + else + return (p); +} + + +#ifdef notdef +/* c__number(): + * Ignore character p points to, return number appearing after that. + * A '$' by itself means a big number; "$-" is for negative; '^' means 1. + * Return p pointing to last char used. + */ +protected char * +c__number( + char *p, /* character position */ + int *num, /* Return value */ + int dval) /* dval is the number to subtract from like $-3 */ +{ + int i; + int sign = 1; + + if (*++p == '^') { + *num = 1; + return (p); + } + if (*p == '$') { + if (*++p != '-') { + *num = 0x7fffffff; /* Handle $ */ + return (--p); + } + sign = -1; /* Handle $- */ + ++p; + } + for (i = 0; isdigit((unsigned char) *p); i = 10 * i + *p++ - '0') + continue; + *num = (sign < 0 ? dval - i : i); + return (--p); +} +#endif + +/* cv_delfini(): + * Finish vi delete action + */ +protected void +cv_delfini(EditLine *el) +{ + int size; + int action = el->el_chared.c_vcmd.action; + + if (action & INSERT) + el->el_map.current = el->el_map.key; + + if (el->el_chared.c_vcmd.pos == 0) + /* sanity */ + return; + + size = el->el_line.cursor - el->el_chared.c_vcmd.pos; + if (size == 0) + size = 1; + el->el_line.cursor = el->el_chared.c_vcmd.pos; + if (action & YANK) { + if (size > 0) + cv_yank(el, el->el_line.cursor, size); + else + cv_yank(el, el->el_line.cursor + size, -size); + } else { + if (size > 0) { + c_delafter(el, size); + re_refresh_cursor(el); + } else { + c_delbefore(el, -size); + el->el_line.cursor += size; + } + } + el->el_chared.c_vcmd.action = NOP; +} + + +#ifdef notdef +/* ce__endword(): + * Go to the end of this word according to emacs + */ +protected char * +ce__endword(char *p, char *high, int n) +{ + p++; + + while (n--) { + while ((p < high) && isspace((unsigned char) *p)) + p++; + while ((p < high) && !isspace((unsigned char) *p)) + p++; + } + + p--; + return (p); +} +#endif + + +/* cv__endword(): + * Go to the end of this word according to vi + */ +protected char * +cv__endword(char *p, char *high, int n, int (*wtest)(int)) +{ + int test; + + p++; + + while (n--) { + while ((p < high) && isspace((unsigned char) *p)) + p++; + + test = (*wtest)((unsigned char) *p); + while ((p < high) && (*wtest)((unsigned char) *p) == test) + p++; + } + p--; + return (p); +} + +/* ch_init(): + * Initialize the character editor + */ +protected int +ch_init(EditLine *el) +{ + c_macro_t *ma = &el->el_chared.c_macro; + + el->el_line.buffer = (char *) el_malloc(EL_BUFSIZ); + if (el->el_line.buffer == NULL) + return (-1); + + (void) memset(el->el_line.buffer, 0, EL_BUFSIZ); + el->el_line.cursor = el->el_line.buffer; + el->el_line.lastchar = el->el_line.buffer; + el->el_line.limit = &el->el_line.buffer[EL_BUFSIZ - EL_LEAVE]; + + el->el_chared.c_undo.buf = (char *) el_malloc(EL_BUFSIZ); + if (el->el_chared.c_undo.buf == NULL) + return (-1); + (void) memset(el->el_chared.c_undo.buf, 0, EL_BUFSIZ); + el->el_chared.c_undo.len = -1; + el->el_chared.c_undo.cursor = 0; + el->el_chared.c_redo.buf = (char *) el_malloc(EL_BUFSIZ); + if (el->el_chared.c_redo.buf == NULL) + return (-1); + el->el_chared.c_redo.pos = el->el_chared.c_redo.buf; + el->el_chared.c_redo.lim = el->el_chared.c_redo.buf + EL_BUFSIZ; + el->el_chared.c_redo.cmd = ED_UNASSIGNED; + + el->el_chared.c_vcmd.action = NOP; + el->el_chared.c_vcmd.pos = el->el_line.buffer; + + el->el_chared.c_kill.buf = (char *) el_malloc(EL_BUFSIZ); + if (el->el_chared.c_kill.buf == NULL) + return (-1); + (void) memset(el->el_chared.c_kill.buf, 0, EL_BUFSIZ); + el->el_chared.c_kill.mark = el->el_line.buffer; + el->el_chared.c_kill.last = el->el_chared.c_kill.buf; + + el->el_map.current = el->el_map.key; + + el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ + el->el_state.doingarg = 0; + el->el_state.metanext = 0; + el->el_state.argument = 1; + el->el_state.lastcmd = ED_UNASSIGNED; + + ma->level = -1; + ma->offset = 0; + ma->macro = (char **) el_malloc(EL_MAXMACRO * sizeof(char *)); + if (ma->macro == NULL) + return (-1); + return (0); +} + +/* ch_reset(): + * Reset the character editor + */ +protected void +ch_reset(EditLine *el, int mclear) +{ + el->el_line.cursor = el->el_line.buffer; + el->el_line.lastchar = el->el_line.buffer; + + el->el_chared.c_undo.len = -1; + el->el_chared.c_undo.cursor = 0; + + el->el_chared.c_vcmd.action = NOP; + el->el_chared.c_vcmd.pos = el->el_line.buffer; + + el->el_chared.c_kill.mark = el->el_line.buffer; + + el->el_map.current = el->el_map.key; + + el->el_state.inputmode = MODE_INSERT; /* XXX: save a default */ + el->el_state.doingarg = 0; + el->el_state.metanext = 0; + el->el_state.argument = 1; + el->el_state.lastcmd = ED_UNASSIGNED; + + el->el_history.eventno = 0; + + if (mclear) + ch__clearmacro(el); +} + +private void +ch__clearmacro(el) + EditLine *el; +{ + c_macro_t *ma = &el->el_chared.c_macro; + while (ma->level >= 0) + el_free((ptr_t)ma->macro[ma->level--]); +} + +/* ch_enlargebufs(): + * Enlarge line buffer to be able to hold twice as much characters. + * Returns 1 if successful, 0 if not. + */ +protected int +ch_enlargebufs(el, addlen) + EditLine *el; + size_t addlen; +{ + size_t sz, newsz; + char *newbuffer, *oldbuf, *oldkbuf; + + sz = el->el_line.limit - el->el_line.buffer + EL_LEAVE; + newsz = sz * 2; + /* + * If newly required length is longer than current buffer, we need + * to make the buffer big enough to hold both old and new stuff. + */ + if (addlen > sz) { + while(newsz - sz < addlen) + newsz *= 2; + } + + /* + * Reallocate line buffer. + */ + newbuffer = el_realloc(el->el_line.buffer, newsz); + if (!newbuffer) + return 0; + + /* zero the newly added memory, leave old data in */ + (void) memset(&newbuffer[sz], 0, newsz - sz); + + oldbuf = el->el_line.buffer; + + el->el_line.buffer = newbuffer; + el->el_line.cursor = newbuffer + (el->el_line.cursor - oldbuf); + el->el_line.lastchar = newbuffer + (el->el_line.lastchar - oldbuf); + /* don't set new size until all buffers are enlarged */ + el->el_line.limit = &newbuffer[sz - EL_LEAVE]; + + /* + * Reallocate kill buffer. + */ + newbuffer = el_realloc(el->el_chared.c_kill.buf, newsz); + if (!newbuffer) + return 0; + + /* zero the newly added memory, leave old data in */ + (void) memset(&newbuffer[sz], 0, newsz - sz); + + oldkbuf = el->el_chared.c_kill.buf; + + el->el_chared.c_kill.buf = newbuffer; + el->el_chared.c_kill.last = newbuffer + + (el->el_chared.c_kill.last - oldkbuf); + el->el_chared.c_kill.mark = el->el_line.buffer + + (el->el_chared.c_kill.mark - oldbuf); + + /* + * Reallocate undo buffer. + */ + newbuffer = el_realloc(el->el_chared.c_undo.buf, newsz); + if (!newbuffer) + return 0; + + /* zero the newly added memory, leave old data in */ + (void) memset(&newbuffer[sz], 0, newsz - sz); + el->el_chared.c_undo.buf = newbuffer; + + newbuffer = el_realloc(el->el_chared.c_redo.buf, newsz); + if (!newbuffer) + return 0; + el->el_chared.c_redo.pos = newbuffer + + (el->el_chared.c_redo.pos - el->el_chared.c_redo.buf); + el->el_chared.c_redo.lim = newbuffer + + (el->el_chared.c_redo.lim - el->el_chared.c_redo.buf); + el->el_chared.c_redo.buf = newbuffer; + + if (!hist_enlargebuf(el, sz, newsz)) + return 0; + + /* Safe to set enlarged buffer size */ + el->el_line.limit = &el->el_line.buffer[newsz - EL_LEAVE]; + return 1; +} + +/* ch_end(): + * Free the data structures used by the editor + */ +protected void +ch_end(EditLine *el) +{ + el_free((ptr_t) el->el_line.buffer); + el->el_line.buffer = NULL; + el->el_line.limit = NULL; + el_free((ptr_t) el->el_chared.c_undo.buf); + el->el_chared.c_undo.buf = NULL; + el_free((ptr_t) el->el_chared.c_redo.buf); + el->el_chared.c_redo.buf = NULL; + el->el_chared.c_redo.pos = NULL; + el->el_chared.c_redo.lim = NULL; + el->el_chared.c_redo.cmd = ED_UNASSIGNED; + el_free((ptr_t) el->el_chared.c_kill.buf); + el->el_chared.c_kill.buf = NULL; + ch_reset(el, 1); + el_free((ptr_t) el->el_chared.c_macro.macro); + el->el_chared.c_macro.macro = NULL; +} + + +/* el_insertstr(): + * Insert string at cursorI + */ +public int +el_insertstr(EditLine *el, const char *s) +{ + size_t len; + + if ((len = strlen(s)) == 0) + return (-1); + if (el->el_line.lastchar + len >= el->el_line.limit) { + if (!ch_enlargebufs(el, len)) + return (-1); + } + + c_insert(el, (int)len); + while (*s) + *el->el_line.cursor++ = *s++; + return (0); +} + + +/* el_deletestr(): + * Delete num characters before the cursor + */ +public void +el_deletestr(EditLine *el, int n) +{ + if (n <= 0) + return; + + if (el->el_line.cursor < &el->el_line.buffer[n]) + return; + + c_delbefore(el, n); /* delete before dot */ + el->el_line.cursor -= n; + if (el->el_line.cursor < el->el_line.buffer) + el->el_line.cursor = el->el_line.buffer; +} + +/* c_gets(): + * Get a string + */ +protected int +c_gets(EditLine *el, char *buf, const char *prompt) +{ + char ch; + int len; + char *cp = el->el_line.buffer; + + if (prompt) { + len = strlen(prompt); + memcpy(cp, prompt, len + 0u); + cp += len; + } + len = 0; + + for (;;) { + el->el_line.cursor = cp; + *cp = ' '; + el->el_line.lastchar = cp + 1; + re_refresh(el); + + if (el_getc(el, &ch) != 1) { + ed_end_of_file(el, 0); + len = -1; + break; + } + + switch (ch) { + + case 0010: /* Delete and backspace */ + case 0177: + if (len <= 0) { + len = -1; + break; + } + cp--; + continue; + + case 0033: /* ESC */ + case '\r': /* Newline */ + case '\n': + buf[len] = ch; + break; + + default: + if (len >= EL_BUFSIZ - 16) + term_beep(el); + else { + buf[len++] = ch; + *cp++ = ch; + } + continue; + } + break; + } + + el->el_line.buffer[0] = '\0'; + el->el_line.lastchar = el->el_line.buffer; + el->el_line.cursor = el->el_line.buffer; + return len; +} + + +/* c_hpos(): + * Return the current horizontal position of the cursor + */ +protected int +c_hpos(EditLine *el) +{ + char *ptr; + + /* + * Find how many characters till the beginning of this line. + */ + if (el->el_line.cursor == el->el_line.buffer) + return (0); + else { + for (ptr = el->el_line.cursor - 1; + ptr >= el->el_line.buffer && *ptr != '\n'; + ptr--) + continue; + return (el->el_line.cursor - ptr - 1); + } +} |