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Diffstat (limited to 'lib/libedit/hist.c')
| -rw-r--r-- | lib/libedit/hist.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/lib/libedit/hist.c b/lib/libedit/hist.c new file mode 100644 index 0000000..27dacd1 --- /dev/null +++ b/lib/libedit/hist.c @@ -0,0 +1,170 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + */ + +#if !defined(lint) && !defined(SCCSID) +static char sccsid[] = "@(#)hist.c 8.1 (Berkeley) 6/4/93"; +#endif /* not lint && not SCCSID */ + +/* + * hist.c: History access functions + */ +#include "sys.h" +#include <stdlib.h> +#include "el.h" + +/* hist_init(): + * Initialization function. + */ +protected int +hist_init(el) + EditLine *el; +{ + el->el_history.fun = NULL; + el->el_history.ref = NULL; + el->el_history.buf = (char *) el_malloc(EL_BUFSIZ); + el->el_history.last = el->el_history.buf; + return 0; +} + + +/* hist_end(): + * clean up history; + */ +protected void +hist_end(el) + EditLine *el; +{ + el_free((ptr_t) el->el_history.buf); + el->el_history.buf = NULL; +} + + +/* hist_set(): + * Set new history interface + */ +protected int +hist_set(el, fun, ptr) + EditLine *el; + hist_fun_t fun; + ptr_t ptr; + +{ + el->el_history.ref = ptr; + el->el_history.fun = fun; + return 0; +} + + +/* hist_get(): + * Get a history line and update it in the buffer. + * eventno tells us the event to get. + */ +protected el_action_t +hist_get(el) + EditLine *el; +{ + const char *hp; + int h; + + if (el->el_history.eventno == 0) { /* if really the current line */ + (void) strncpy(el->el_line.buffer, el->el_history.buf, EL_BUFSIZ); + el->el_line.lastchar = el->el_line.buffer + + (el->el_history.last - el->el_history.buf); + +#ifdef KSHVI + if (el->el_map.type == MAP_VI) + el->el_line.cursor = el->el_line.buffer; + else +#endif /* KSHVI */ + el->el_line.cursor = el->el_line.lastchar; + + return CC_REFRESH; + } + + if (el->el_history.ref == NULL) + return CC_ERROR; + + hp = HIST_FIRST(el); + + if (hp == NULL) + return CC_ERROR; + + for (h = 1; h < el->el_history.eventno; h++) + if ((hp = HIST_NEXT(el)) == NULL) { + el->el_history.eventno = h; + return CC_ERROR; + } + + (void) strncpy(el->el_line.buffer, hp, EL_BUFSIZ); + el->el_line.lastchar = el->el_line.buffer + strlen(el->el_line.buffer); + + if (el->el_line.lastchar > el->el_line.buffer) { + if (el->el_line.lastchar[-1] == '\n') + el->el_line.lastchar--; + if (el->el_line.lastchar[-1] == ' ') + el->el_line.lastchar--; + if (el->el_line.lastchar < el->el_line.buffer) + el->el_line.lastchar = el->el_line.buffer; + } + +#ifdef KSHVI + if (el->el_map.type == MAP_VI) + el->el_line.cursor = el->el_line.buffer; + else +#endif /* KSHVI */ + el->el_line.cursor = el->el_line.lastchar; + + return CC_REFRESH; +} + +/* hist_list() + * List history entries + */ +protected int +/*ARGSUSED*/ +hist_list(el, argc, argv) + EditLine *el; + int argc; + char **argv; +{ + const char *str; + + if (el->el_history.ref == NULL) + return -1; + for (str = HIST_LAST(el); str != NULL; str = HIST_PREV(el)) + (void) fprintf(el->el_outfile, "%d %s", el->el_history.ev->num, str); + return 0; +} |
