This commit was generated by cvs2svn to compensate for changes in r90744,

which included commits to RCS files with non-trunk default branches.

2 files changed, 835 insertions, 0 deletions

diff --git a/usr.bin/m4/gnum4.c b/usr.bin/m4/gnum4.c
new file mode 100644
index 0000000..782090d
--- /dev/null
+++ b/usr.bin/m4/gnum4.c
@@ -0,0 +1,563 @@
+/* $OpenBSD: gnum4.c,v 1.16 2002/02/16 21:27:48 millert Exp $ */
+
+/*
+ * Copyright (c) 1999 Marc Espie
+ *
+ * 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 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.
+ */
+
+/* 
+ * functions needed to support gnu-m4 extensions, including a fake freezing
+ */
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <ctype.h>
+#include <paths.h>
+#include <regex.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <err.h>
+#include <errno.h>
+#include <unistd.h>
+#include "mdef.h"
+#include "stdd.h"
+#include "extern.h"
+
+
+int mimic_gnu = 0;
+
+/*
+ * Support for include path search
+ * First search in the the current directory.
+ * If not found, and the path is not absolute, include path kicks in.
+ * First, -I options, in the order found on the command line.
+ * Then M4PATH env variable
+ */
+
+struct path_entry {
+	char *name;
+	struct path_entry *next;
+} *first, *last;
+
+static struct path_entry *new_path_entry(const char *);
+static void ensure_m4path(void);
+static struct input_file *dopath(struct input_file *, const char *);
+
+static struct path_entry *
+new_path_entry(dirname)
+	const char *dirname;
+{
+	struct path_entry *n;
+
+	n = malloc(sizeof(struct path_entry));
+	if (!n)
+		errx(1, "out of memory");
+	n->name = strdup(dirname);
+	if (!n->name)
+		errx(1, "out of memory");
+	n->next = 0;
+	return n;
+}
+	
+void 
+addtoincludepath(dirname)
+	const char *dirname;
+{
+	struct path_entry *n;
+
+	n = new_path_entry(dirname);
+
+	if (last) {
+		last->next = n;
+		last = n;
+	}
+	else
+		last = first = n;
+}
+
+static void
+ensure_m4path()
+{
+	static int envpathdone = 0;
+	char *envpath;
+	char *sweep;
+	char *path;
+
+	if (envpathdone)
+		return;
+	envpathdone = TRUE;
+	envpath = getenv("M4PATH");
+	if (!envpath) 
+		return;
+	/* for portability: getenv result is read-only */
+	envpath = strdup(envpath);
+	if (!envpath)
+		errx(1, "out of memory");
+	for (sweep = envpath; 
+	    (path = strsep(&sweep, ":")) != NULL;)
+	    addtoincludepath(path);
+	free(envpath);
+}
+
+static
+struct input_file *
+dopath(i, filename)
+	struct input_file *i;
+	const char *filename;
+{
+	char path[MAXPATHLEN];
+	struct path_entry *pe;
+	FILE *f;
+
+	for (pe = first; pe; pe = pe->next) {
+		snprintf(path, sizeof(path), "%s/%s", pe->name, filename);
+		if ((f = fopen(path, "r")) != 0) {
+			set_input(i, f, path);
+			return i;
+		}
+	}
+	return NULL;
+}
+
+struct input_file *
+fopen_trypath(i, filename)
+	struct input_file *i;
+	const char *filename;
+{
+	FILE *f;
+
+	f = fopen(filename, "r");
+	if (f != NULL) {
+		set_input(i, f, filename);
+		return i;
+	}
+	if (filename[0] == '/')
+		return NULL;
+
+	ensure_m4path();
+
+	return dopath(i, filename);
+}
+
+void 
+doindir(argv, argc)
+	const char *argv[];
+	int argc;
+{
+	ndptr p;
+
+	p = lookup(argv[2]);
+	if (p == NULL)
+		errx(1, "undefined macro %s", argv[2]);
+	argv[1] = p->defn;
+	eval(argv+1, argc-1, p->type);
+}
+
+void 
+dobuiltin(argv, argc)
+	const char *argv[];
+	int argc;
+{
+	int n;
+	argv[1] = NULL;
+	n = builtin_type(argv[2]);
+	if (n != -1)
+		eval(argv+1, argc-1, n);
+	else
+		errx(1, "unknown builtin %s", argv[2]);
+} 
+
+
+/* We need some temporary buffer space, as pb pushes BACK and substitution
+ * proceeds forward... */
+static char *buffer;
+static size_t bufsize = 0;
+static size_t current = 0;
+
+static void addchars(const char *, size_t);
+static void addchar(char);
+static char *twiddle(const char *);
+static char *getstring(void);
+static void exit_regerror(int, regex_t *);
+static void do_subst(const char *, regex_t *, const char *, regmatch_t *);
+static void do_regexpindex(const char *, regex_t *, regmatch_t *);
+static void do_regexp(const char *, regex_t *, const char *, regmatch_t *);
+static void add_sub(int, const char *, regex_t *, regmatch_t *);
+static void add_replace(const char *, regex_t *, const char *, regmatch_t *);
+#define addconstantstring(s) addchars((s), sizeof(s)-1)
+
+static void 
+addchars(c, n)
+	const char *c;
+	size_t n;
+{
+	if (n == 0)
+		return;
+	while (current + n > bufsize) {
+		if (bufsize == 0)
+			bufsize = 1024;
+		else
+			bufsize *= 2;
+		buffer = realloc(buffer, bufsize);
+		if (buffer == NULL)
+			errx(1, "out of memory");
+	}
+	memcpy(buffer+current, c, n);
+	current += n;
+}
+
+static void 
+addchar(c)
+	char c;
+{
+	if (current +1 > bufsize) {
+		if (bufsize == 0)
+			bufsize = 1024;
+		else
+			bufsize *= 2;
+		buffer = realloc(buffer, bufsize);
+		if (buffer == NULL)
+			errx(1, "out of memory");
+	}
+	buffer[current++] = c;
+}
+
+static char *
+getstring()
+{
+	addchar('\0');
+	current = 0;
+	return buffer;
+}
+
+
+static void 
+exit_regerror(er, re)
+	int er;
+	regex_t *re;
+{
+	size_t 	errlen;
+	char 	*errbuf;
+
+	errlen = regerror(er, re, NULL, 0);
+	errbuf = xalloc(errlen);
+	regerror(er, re, errbuf, errlen);
+	errx(1, "regular expression error: %s", errbuf);
+}
+
+static void
+add_sub(n, string, re, pm)
+	int n;
+	const char *string;
+	regex_t *re;
+	regmatch_t *pm;
+{
+	if (n > re->re_nsub)
+		warnx("No subexpression %d", n);
+	/* Subexpressions that did not match are
+	 * not an error.  */
+	else if (pm[n].rm_so != -1 &&
+	    pm[n].rm_eo != -1) {
+		addchars(string + pm[n].rm_so,
+			pm[n].rm_eo - pm[n].rm_so);
+	}
+}
+
+/* Add replacement string to the output buffer, recognizing special
+ * constructs and replacing them with substrings of the original string.
+ */
+static void 
+add_replace(string, re, replace, pm)
+	const char *string;
+	regex_t *re;
+	const char *replace;
+	regmatch_t *pm;
+{
+	const char *p;
+
+	for (p = replace; *p != '\0'; p++) {
+		if (*p == '&' && !mimic_gnu) {
+			add_sub(0, string, re, pm);
+			continue;
+		}
+		if (*p == '\\') {
+			if (p[1] == '\\') {
+				addchar(p[1]);
+				p++;
+				continue;
+			}
+			if (p[1] == '&') {
+				if (mimic_gnu)
+					add_sub(0, string, re, pm);
+				else
+					addchar(p[1]);
+				p++;
+				continue;
+			}
+			if (isdigit(p[1])) {
+				add_sub(*(++p) - '0', string, re, pm);
+				continue;
+			}
+		}
+	    	addchar(*p);
+	}
+}
+
+static void 
+do_subst(string, re, replace, pm)
+	const char *string;
+	regex_t *re;
+	const char *replace;
+	regmatch_t *pm;
+{
+	int error;
+	int flags = 0;
+	const char *last_match = NULL;
+
+	while ((error = regexec(re, string, re->re_nsub+1, pm, flags)) == 0) {
+		if (pm[0].rm_eo != 0) {
+			if (string[pm[0].rm_eo-1] == '\n')
+				flags = 0;
+			else
+				flags = REG_NOTBOL;
+		}
+
+		/* NULL length matches are special... We use the `vi-mode' 
+		 * rule: don't allow a NULL-match at the last match
+		 * position. 
+		 */
+		if (pm[0].rm_so == pm[0].rm_eo && 
+		    string + pm[0].rm_so == last_match) {
+			if (*string == '\0')
+				return;
+			addchar(*string);
+			if (*string++ == '\n')
+				flags = 0;
+			else
+				flags = REG_NOTBOL;
+			continue;
+		}
+		last_match = string + pm[0].rm_so;
+		addchars(string, pm[0].rm_so);
+		add_replace(string, re, replace, pm);
+		string += pm[0].rm_eo;
+	}
+	if (error != REG_NOMATCH)
+		exit_regerror(error, re);
+	pbstr(string);
+}
+
+static void 
+do_regexp(string, re, replace, pm)
+	const char *string;
+	regex_t *re;
+	const char *replace;
+	regmatch_t *pm;
+{
+	int error;
+
+	switch(error = regexec(re, string, re->re_nsub+1, pm, 0)) {
+	case 0: 
+		add_replace(string, re, replace, pm);
+		pbstr(getstring());
+		break;
+	case REG_NOMATCH:
+		break;
+	default:
+		exit_regerror(error, re);
+	}
+}
+
+static void 
+do_regexpindex(string, re, pm)
+	const char *string;
+	regex_t *re;
+	regmatch_t *pm;
+{
+	int error;
+
+	switch(error = regexec(re, string, re->re_nsub+1, pm, 0)) {
+	case 0:
+		pbunsigned(pm[0].rm_so);
+		break;
+	case REG_NOMATCH:
+		pbnum(-1);
+		break;
+	default:
+		exit_regerror(error, re);
+	}
+}
+
+/* In Gnu m4 mode, parentheses for backmatch don't work like POSIX 1003.2
+ * says. So we twiddle with the regexp before passing it to regcomp.
+ */
+static char *
+twiddle(p)
+	const char *p;
+{
+	/* This could use strcspn for speed... */
+	while (*p != '\0') {
+		if (*p == '\\') {
+			switch(p[1]) {
+			case '(':
+			case ')':
+			case '|':
+				addchar(p[1]);
+				break;
+			case 'w':
+				addconstantstring("[_a-zA-Z0-9]");
+				break;
+			case 'W':
+				addconstantstring("[^_a-zA-Z0-9]");
+				break;
+			case '<':
+				addconstantstring("[[:<:]]");
+				break;
+			case '>':
+				addconstantstring("[[:>:]]");
+				break;
+			default:
+				addchars(p, 2);
+				break;
+			}
+			p+=2;
+			continue;
+		}
+		if (*p == '(' || *p == ')' || *p == '|')
+			addchar('\\');
+
+		addchar(*p);
+		p++;
+	}
+	return getstring();
+}
+
+/* patsubst(string, regexp, opt replacement) */
+/* argv[2]: string
+ * argv[3]: regexp
+ * argv[4]: opt rep
+ */
+void
+dopatsubst(argv, argc)
+	const char *argv[];
+	int argc;
+{
+	int error;
+	regex_t re;
+	regmatch_t *pmatch;
+
+	if (argc <= 3) {
+		warnx("Too few arguments to patsubst");
+		return;
+	}
+	error = regcomp(&re, mimic_gnu ? twiddle(argv[3]) : argv[3], 
+	    REG_NEWLINE | REG_EXTENDED);
+	if (error != 0)
+		exit_regerror(error, &re);
+	
+	pmatch = xalloc(sizeof(regmatch_t) * (re.re_nsub+1));
+	do_subst(argv[2], &re, 
+	    argc != 4 && argv[4] != NULL ? argv[4] : "", pmatch);
+	pbstr(getstring());
+	free(pmatch);
+	regfree(&re);
+}
+
+void
+doregexp(argv, argc)
+	const char *argv[];
+	int argc;
+{
+	int error;
+	regex_t re;
+	regmatch_t *pmatch;
+
+	if (argc <= 3) {
+		warnx("Too few arguments to regexp");
+		return;
+	}
+	error = regcomp(&re, mimic_gnu ? twiddle(argv[3]) : argv[3], 
+	    REG_EXTENDED);
+	if (error != 0)
+		exit_regerror(error, &re);
+	
+	pmatch = xalloc(sizeof(regmatch_t) * (re.re_nsub+1));
+	if (argv[4] == NULL || argc == 4)
+		do_regexpindex(argv[2], &re, pmatch);
+	else
+		do_regexp(argv[2], &re, argv[4], pmatch);
+	free(pmatch);
+	regfree(&re);
+}
+
+void
+doesyscmd(cmd)
+	const char *cmd;
+{
+	int p[2];
+	pid_t pid, cpid;
+	char *argv[4];
+	int cc;
+	int status;
+
+	/* Follow gnu m4 documentation: first flush buffers. */
+	fflush(NULL);
+
+	argv[0] = "sh";
+	argv[1] = "-c";
+	argv[2] = (char *)cmd;
+	argv[3] = NULL;
+
+	/* Just set up standard output, share stderr and stdin with m4 */
+	if (pipe(p) == -1)
+		err(1, "bad pipe");
+	switch(cpid = fork()) {
+	case -1:
+		err(1, "bad fork");
+		/* NOTREACHED */
+	case 0:
+		(void) close(p[0]);
+		(void) dup2(p[1], 1);
+		(void) close(p[1]);
+		execv(_PATH_BSHELL, argv);
+		exit(1);
+	default:
+		/* Read result in two stages, since m4's buffer is
+		 * pushback-only. */
+		(void) close(p[1]);
+		do {
+			char result[BUFSIZE];
+			cc = read(p[0], result, sizeof result);
+			if (cc > 0)
+				addchars(result, cc);
+		} while (cc > 0 || (cc == -1 && errno == EINTR));
+
+		(void) close(p[0]);
+		while ((pid = wait(&status)) != cpid && pid >= 0)
+			continue;
+		pbstr(getstring());
+	}
+}
diff --git a/usr.bin/m4/trace.c b/usr.bin/m4/trace.c
new file mode 100644
index 0000000..231667e
--- /dev/null
+++ b/usr.bin/m4/trace.c
@@ -0,0 +1,272 @@
+/* $OpenBSD: trace.c,v 1.4 2002/02/16 21:27:48 millert Exp $ */
+/*
+ * Copyright (c) 2001 Marc Espie.
+ *
+ * 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 OPENBSD PROJECT 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 OPENBSD
+ * PROJECT 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/types.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <err.h>
+#include <stdlib.h>
+#include "mdef.h"
+#include "stdd.h"
+#include "extern.h"
+
+FILE *traceout = stderr;
+
+int traced_macros = 0;
+
+#define TRACE_ARGS 	1
+#define TRACE_EXPANSION 2
+#define TRACE_QUOTE	4
+#define TRACE_FILENAME	8
+#define TRACE_LINENO	16
+#define TRACE_CONT	32
+#define TRACE_ID	64
+#define TRACE_NEWFILE	128	/* not implemented yet */
+#define TRACE_INPUT	256	/* not implemented yet */
+#define TRACE_ALL	512
+
+static struct t {
+	struct t *next;
+	char 	 *name;
+	int	  on;
+} *l;
+
+static unsigned int letter_to_flag(int);
+static void print_header(struct input_file *);
+static struct t *find_trace_entry(const char *);
+static int frame_level(void);
+
+static unsigned int flags = TRACE_QUOTE | TRACE_EXPANSION;
+
+static struct t *
+find_trace_entry(name)
+	const char *name;
+{
+	struct t *n;
+
+	for (n = l; n != NULL; n = n->next)
+		if (STREQ(n->name, name))
+			return n;
+	return NULL;
+}
+
+
+void
+mark_traced(name, on)
+	const char *name;
+	int on;
+{
+	struct t *n, *n2;
+
+	traced_macros = 1;
+
+	if (name == NULL) {
+		if (on)
+			flags |= TRACE_ALL;
+		else {
+			flags &= ~TRACE_ALL;
+			traced_macros = 0;
+		}
+		for (n = l; n != NULL; n = n2) {
+			n2 = n->next;
+			free(n->name);
+			free(n);
+		}
+		l = NULL;
+	} else {
+	    n = find_trace_entry(name);
+	    if (n == NULL) {
+	n = xalloc(sizeof(struct t));
+	n->name = xstrdup(name);
+	n->next = l;
+	l = n;
+	    }
+	    n->on = on;
+	}
+}
+
+int 
+is_traced(name)
+	const char *name;
+{
+	struct t *n;
+
+	for (n = l; n != NULL; n = n->next)
+		if (STREQ(n->name, name))
+			return n->on;
+	return (flags & TRACE_ALL) ? 1 : 0;
+}
+
+void
+trace_file(name)
+	const char *name;
+{
+
+	if (traceout != stderr)
+		fclose(traceout);
+	traceout = fopen(name, "w");
+	if (!traceout)
+		err(1, "can't open %s", name);
+}
+
+static unsigned int
+letter_to_flag(c)
+	int c;
+{
+	switch(c) {
+	case 'a':
+		return TRACE_ARGS;
+	case 'e':
+		return TRACE_EXPANSION;
+	case 'q':
+		return TRACE_QUOTE;
+	case 'c':
+		return TRACE_CONT;
+	case 'x':
+		return TRACE_ID;
+	case 'f':
+		return TRACE_FILENAME;
+	case 'l':
+		return TRACE_LINENO;
+	case 'p':
+		return TRACE_NEWFILE;
+	case 'i':
+		return TRACE_INPUT;
+	case 't':
+		return TRACE_ALL;
+	case 'V':
+		return ~0;
+	default:
+		return 0;
+	}
+}
+
+void
+set_trace_flags(s)
+	const char *s;
+{
+	char mode = 0;
+	unsigned int f = 0;
+
+	traced_macros = 1;
+
+	if (*s == '+' || *s == '-')
+		mode = *s++;
+	while (*s)
+		f |= letter_to_flag(*s++);
+	switch(mode) {
+	case 0:
+		flags = f;
+		break;
+	case '+':
+		flags |= f;
+		break;
+	case '-':
+		flags &= ~f;
+		break;
+	}
+}
+
+static int
+frame_level()
+{
+	int level;
+	int framep;
+
+	for (framep = fp, level = 0; framep != 0; 
+		level++,framep = mstack[framep-2].sfra)
+		;
+	return level;
+}
+
+static void
+print_header(inp)
+	struct input_file *inp;
+{
+	fprintf(traceout, "m4trace:");
+	if (flags & TRACE_FILENAME)
+		fprintf(traceout, "%s:", inp->name);
+	if (flags & TRACE_LINENO)
+		fprintf(traceout, "%lu:", inp->lineno);
+	fprintf(traceout, " -%d- ", frame_level());
+	if (flags & TRACE_ID)
+		fprintf(traceout, "id %lu: ", expansion_id);
+}
+
+ssize_t 
+trace(argv, argc, inp)
+	const char **argv;
+	int argc;
+	struct input_file *inp;
+{
+	print_header(inp);
+	if (flags & TRACE_CONT) {
+		fprintf(traceout, "%s ...\n", argv[1]);
+		print_header(inp);
+	}
+	fprintf(traceout, "%s", argv[1]);
+	if ((flags & TRACE_ARGS) && argc > 2) {
+		char delim[3];
+		int i;
+
+		delim[0] = LPAREN;
+		delim[1] = EOS;
+		for (i = 2; i < argc; i++) {
+			fprintf(traceout, "%s%s%s%s", delim, 
+			    (flags & TRACE_QUOTE) ? lquote : "", 
+			    argv[i], 
+			    (flags & TRACE_QUOTE) ? rquote : "");
+			delim[0] = COMMA;
+			delim[1] = ' ';
+			delim[2] = EOS;
+		}
+		fprintf(traceout, "%c", RPAREN);
+	}
+	if (flags & TRACE_CONT) {
+		fprintf(traceout, " -> ???\n");
+		print_header(inp);
+		fprintf(traceout, argc > 2 ? "%s(...)" : "%s", argv[1]);
+	}
+	if (flags & TRACE_EXPANSION)
+		return buffer_mark();
+	else {
+		fprintf(traceout, "\n");
+		return -1;
+	}
+}
+
+void 
+finish_trace(mark)
+size_t mark;
+{
+	fprintf(traceout, " -> ");
+	if (flags & TRACE_QUOTE)
+		fprintf(traceout, "%s", lquote);
+	dump_buffer(traceout, mark);
+	if (flags & TRACE_QUOTE)
+		fprintf(traceout, "%s", rquote);
+	fprintf(traceout, "\n");
+}