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Diffstat (limited to 'bin/ed/glbl.c')
| -rw-r--r-- | bin/ed/glbl.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/bin/ed/glbl.c b/bin/ed/glbl.c new file mode 100644 index 0000000..90e602c --- /dev/null +++ b/bin/ed/glbl.c @@ -0,0 +1,207 @@ +/* $OpenBSD: glbl.c,v 1.20 2018/06/04 13:26:21 martijn Exp $ */ +/* $NetBSD: glbl.c,v 1.2 1995/03/21 09:04:41 cgd Exp $ */ + +/* glob.c: This file contains the global command routines for the ed line + editor */ +/*- + * Copyright (c) 1993 Andrew Moore, Talke Studio. + * All rights reserved. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/ioctl.h> +#include <sys/wait.h> + +#include <regex.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "ed.h" + +static int set_active_node(line_t *); +static line_t *next_active_node(void); + +/* build_active_list: add line matching a pattern to the global-active list */ +int +build_active_list(int isgcmd) +{ + regex_t *pat; + line_t *lp; + int n; + char *s; + char delimiter; + + if ((delimiter = *ibufp) == ' ' || delimiter == '\n') { + seterrmsg("invalid pattern delimiter"); + return ERR; + } else if ((pat = get_compiled_pattern()) == NULL) + return ERR; + else if (*ibufp == delimiter) + ibufp++; + clear_active_list(); + lp = get_addressed_line_node(first_addr); + for (n = first_addr; n <= second_addr; n++, lp = lp->q_forw) { + if ((s = get_sbuf_line(lp)) == NULL) + return ERR; + if (isbinary) + NUL_TO_NEWLINE(s, lp->len); + if ((!regexec(pat, s, 0, NULL, 0)) == isgcmd && + set_active_node(lp) < 0) + return ERR; + } + return 0; +} + + +/* exec_global: apply command list in the command buffer to the active + lines in a range; return command status */ +int +exec_global(int interact, int gflag) +{ + static char *ocmd = NULL; + static int ocmdsz = 0; + + line_t *lp = NULL; + int status; + int n; + char *cmd = NULL; + + if (!interact) { + if (!strcmp(ibufp, "\n")) + cmd = "p\n"; /* null cmd-list == `p' */ + else if ((cmd = get_extended_line(&n, 0)) == NULL) + return ERR; + } + clear_undo_stack(); + while ((lp = next_active_node()) != NULL) { + if ((current_addr = get_line_node_addr(lp)) < 0) + return ERR; + if (interact) { + /* print current_addr; get a command in global syntax */ + if (display_lines(current_addr, current_addr, gflag) < 0) + return ERR; + while ((n = get_tty_line()) > 0 && + ibuf[n - 1] != '\n') + clearerr(stdin); + if (n < 0) + return ERR; + else if (n == 0) { + seterrmsg("unexpected end-of-file"); + return ERR; + } else if (n == 1 && !strcmp(ibuf, "\n")) + continue; + else if (n == 2 && !strcmp(ibuf, "&\n")) { + if (cmd == NULL) { + seterrmsg("no previous command"); + return ERR; + } else cmd = ocmd; + } else if ((cmd = get_extended_line(&n, 0)) == NULL) + return ERR; + else { + REALLOC(ocmd, ocmdsz, n + 1, ERR); + memcpy(ocmd, cmd, n + 1); + cmd = ocmd; + } + + } + ibufp = cmd; + for (; *ibufp;) + if ((status = extract_addr_range()) < 0 || + (status = exec_command()) < 0 || + (status > 0 && (status = display_lines( + current_addr, current_addr, status)) < 0)) + return status; + } + return 0; +} + + +static line_t **active_list; /* list of lines active in a global command */ +static int active_last; /* index of last active line in active_list */ +static int active_size; /* size of active_list */ +static int active_ptr; /* active_list index (non-decreasing) */ +static int active_ndx; /* active_list index (modulo active_last) */ + +/* set_active_node: add a line node to the global-active list */ +static int +set_active_node(line_t *lp) +{ + if (active_last + 1 > active_size) { + int ti = active_size; + line_t **ts; + SPL1(); + if ((ts = reallocarray(active_list, + (ti += MINBUFSZ), sizeof(line_t **))) == NULL) { + perror(NULL); + seterrmsg("out of memory"); + SPL0(); + return ERR; + } + active_size = ti; + active_list = ts; + SPL0(); + } + active_list[active_last++] = lp; + return 0; +} + + +/* unset_active_nodes: remove a range of lines from the global-active list */ +void +unset_active_nodes(line_t *np, line_t *mp) +{ + line_t *lp; + int i; + + for (lp = np; lp != mp; lp = lp->q_forw) + for (i = 0; i < active_last; i++) + if (active_list[active_ndx] == lp) { + active_list[active_ndx] = NULL; + active_ndx = INC_MOD(active_ndx, active_last - 1); + break; + } else active_ndx = INC_MOD(active_ndx, active_last - 1); +} + + +/* next_active_node: return the next global-active line node */ +static line_t * +next_active_node(void) +{ + while (active_ptr < active_last && active_list[active_ptr] == NULL) + active_ptr++; + return (active_ptr < active_last) ? active_list[active_ptr++] : NULL; +} + + +/* clear_active_list: clear the global-active list */ +void +clear_active_list(void) +{ + SPL1(); + active_size = active_last = active_ptr = active_ndx = 0; + free(active_list); + active_list = NULL; + SPL0(); +} |