initial population

1 files changed, 262 insertions, 0 deletions

diff --git a/bin/ed/sub.c b/bin/ed/sub.c
new file mode 100644
index 0000000..933c6b9
--- /dev/null
+++ b/bin/ed/sub.c
@@ -0,0 +1,262 @@
+/*	$NetBSD: sub.c,v 1.7 2014/03/23 05:06:42 dholland Exp $	*/
+
+/* sub.c: This file contains the substitution 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/cdefs.h>
+#ifndef lint
+#if 0
+static char *rcsid = "@(#)sub.c,v 1.1 1994/02/01 00:34:44 alm Exp";
+#else
+__RCSID("$NetBSD: sub.c,v 1.7 2014/03/23 05:06:42 dholland Exp $");
+#endif
+#endif /* not lint */
+
+#include "ed.h"
+
+
+char *rhbuf;			/* rhs substitution buffer */
+int rhbufsz;			/* rhs substitution buffer size */
+int rhbufi;			/* rhs substitution buffer index */
+
+/* extract_subst_tail: extract substitution tail from the command buffer */
+int
+extract_subst_tail(int *flagp, long *np)
+{
+	char delimiter;
+
+	*flagp = *np = 0;
+	if ((delimiter = *ibufp) == '\n') {
+		rhbufi = 0;
+		*flagp = GPR;
+		return 0;
+	} else if (extract_subst_template() == NULL)
+		return  ERR;
+	else if (*ibufp == '\n') {
+		*flagp = GPR;
+		return 0;
+	} else if (*ibufp == delimiter)
+		ibufp++;
+	if ('1' <= *ibufp && *ibufp <= '9') {
+		STRTOL(*np, ibufp);
+		return 0;
+	} else if (*ibufp == 'g') {
+		ibufp++;
+		*flagp = GSG;
+		return 0;
+	}
+	return 0;
+}
+
+
+/* extract_subst_template: return pointer to copy of substitution template
+   in the command buffer */
+char *
+extract_subst_template(void)
+{
+	int n = 0;
+	int i = 0;
+	char c;
+	char delimiter = *ibufp++;
+
+	if (*ibufp == '%' && *(ibufp + 1) == delimiter) {
+		ibufp++;
+		if (!rhbuf) {
+			seterrmsg("no previous substitution");
+		}
+		return rhbuf;
+	}
+	while (*ibufp != delimiter) {
+		REALLOC(rhbuf, rhbufsz, i + 2, NULL);
+		if ((c = rhbuf[i++] = *ibufp++) == '\n' && *ibufp == '\0') {
+			i--, ibufp--;
+			break;
+		} else if (c != '\\')
+			;
+		else if ((rhbuf[i++] = *ibufp++) != '\n')
+			;
+		else if (!isglobal) {
+			while ((n = get_tty_line()) == 0 ||
+			    (n > 0 && ibuf[n - 1] != '\n'))
+				clearerr(stdin);
+			if (n < 0)
+				return NULL;
+		}
+	}
+	REALLOC(rhbuf, rhbufsz, i + 1, NULL);
+	rhbuf[rhbufi = i] = '\0';
+	return  rhbuf;
+}
+
+
+char *rbuf;			/* substitute_matching_text buffer */
+int rbufsz;			/* substitute_matching_text buffer size */
+
+/* search_and_replace: for each line in a range, change text matching a pattern
+   according to a substitution template; return status  */
+int
+search_and_replace(pattern_t *pat, int gflag, int kth)
+{
+	undo_t *up;
+	char *txt;
+	char *eot;
+	long lc;
+	long xa = current_addr;
+	int nsubs = 0;
+	line_t *lp;
+	int len;
+
+	current_addr = first_addr - 1;
+	for (lc = 0; lc <= second_addr - first_addr; lc++) {
+		lp = get_addressed_line_node(++current_addr);
+		if ((len = substitute_matching_text(pat, lp, gflag, kth)) < 0)
+			return ERR;
+		else if (len) {
+			up = NULL;
+			if (delete_lines(current_addr, current_addr) < 0)
+				return ERR;
+			txt = rbuf;
+			eot = rbuf + len;
+			SPL1();
+			do {
+				if ((txt = put_sbuf_line(txt)) == NULL) {
+					SPL0();
+					return ERR;
+				} else if (up)
+					up->t = get_addressed_line_node(current_addr);
+				else if ((up = push_undo_stack(UADD,
+				    current_addr, current_addr)) == NULL) {
+					SPL0();
+					return ERR;
+				}
+			} while (txt != eot);
+			SPL0();
+			nsubs++;
+			xa = current_addr;
+		}
+	}
+	current_addr = xa;
+	if  (nsubs == 0 && !(gflag & GLB)) {
+		seterrmsg("no match");
+		return ERR;
+	} else if ((gflag & (GPR | GLS | GNP)) &&
+	    display_lines(current_addr, current_addr, gflag) < 0)
+		return ERR;
+	return 0;
+}
+
+
+/* substitute_matching_text: replace text matched by a pattern according to
+   a substitution template; return pointer to the modified text */
+int
+substitute_matching_text(pattern_t *pat, line_t *lp, int gflag, int kth)
+{
+	int off = 0;
+	int changed = 0;
+	int matchno = 0;
+	int i = 0;
+	regmatch_t rm[SE_MAX];
+	char *txt;
+	char *eot;
+
+	if ((txt = get_sbuf_line(lp)) == NULL)
+		return ERR;
+	if (isbinary) 
+		NUL_TO_NEWLINE(txt, lp->len);
+	eot = txt + lp->len;
+	if (!regexec(pat, txt, SE_MAX, rm, 0)) {
+		do {
+			if (!kth || kth == ++matchno) {
+				changed++;
+				i = rm[0].rm_so;
+				REALLOC(rbuf, rbufsz, off + i, ERR);
+				if (isbinary)
+					NEWLINE_TO_NUL(txt, rm[0].rm_eo);
+				memcpy(rbuf + off, txt, i);
+				off += i;
+				if ((off = apply_subst_template(txt, rm, off,
+				    pat->re_nsub)) < 0)
+					return ERR;
+			} else {
+				i = rm[0].rm_eo;
+				REALLOC(rbuf, rbufsz, off + i, ERR);
+				if (isbinary)
+					NEWLINE_TO_NUL(txt, i);
+				memcpy(rbuf + off, txt, i);
+				off += i;
+			}
+			txt += rm[0].rm_eo;
+		} while (*txt && (!changed || ((gflag & GSG) && rm[0].rm_eo))
+		    && !regexec(pat, txt, SE_MAX, rm, REG_NOTBOL));
+		i = eot - txt;
+		REALLOC(rbuf, rbufsz, off + i + 2, ERR);
+		if (i > 0 && !rm[0].rm_eo && (gflag & GSG)) {
+			seterrmsg("infinite substitution loop");
+			return  ERR;
+		}
+		if (isbinary)
+			NEWLINE_TO_NUL(txt, i);
+		memcpy(rbuf + off, txt, i);
+		memcpy(rbuf + off + i, "\n", 2);
+	}
+	return changed ? off + i + 1 : 0;
+}
+
+
+/* apply_subst_template: modify text according to a substitution template;
+   return offset to end of modified text */
+int
+apply_subst_template(char *boln, regmatch_t *rm, int off, int re_nsub)
+{
+	int j = 0;
+	int k = 0;
+	int n;
+	char *sub = rhbuf;
+
+	for (; sub - rhbuf < rhbufi; sub++)
+		if (*sub == '&') {
+			j = rm[0].rm_so;
+			k = rm[0].rm_eo;
+			REALLOC(rbuf, rbufsz, off + k - j, ERR);
+			while (j < k)
+				rbuf[off++] = boln[j++];
+		} else if (*sub == '\\' && '1' <= *++sub && *sub <= '9' &&
+		    (n = *sub - '0') <= re_nsub) {
+			j = rm[n].rm_so;
+			k = rm[n].rm_eo;
+			REALLOC(rbuf, rbufsz, off + k - j, ERR);
+			while (j < k)
+				rbuf[off++] = boln[j++];
+		} else {
+			REALLOC(rbuf, rbufsz, off + 1, ERR);
+			rbuf[off++] = *sub;
+		}
+	REALLOC(rbuf, rbufsz, off + 1, ERR);
+	rbuf[off] = '\0';
+	return off;
+}