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Diffstat (limited to 'usr.bin/m4/gnum4.c')
-rw-r--r--usr.bin/m4/gnum4.c817
1 files changed, 817 insertions, 0 deletions
diff --git a/usr.bin/m4/gnum4.c b/usr.bin/m4/gnum4.c
new file mode 100644
index 0000000..a450a99
--- /dev/null
+++ b/usr.bin/m4/gnum4.c
@@ -0,0 +1,817 @@
+/* $NetBSD: gnum4.c,v 1.10 2016/01/16 16:59:18 christos Exp $ */
+/* $OpenBSD: gnum4.c,v 1.39 2008/08/21 21:01:04 espie 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
+ */
+#if HAVE_NBTOOL_CONFIG_H
+#include "nbtool_config.h"
+#endif
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: gnum4.c,v 1.10 2016/01/16 16:59:18 christos Exp $");
+
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <ctype.h>
+#include <err.h>
+#include <paths.h>
+#include <regex.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include "mdef.h"
+#include "stdd.h"
+#include "extern.h"
+
+
+int mimic_gnu = 0;
+#ifndef SIZE_T_MAX
+#define SIZE_T_MAX (size_t)~0ull
+#endif
+
+/*
+ * Support for include path search
+ * First search in 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(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(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(void)
+{
+ 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(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(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(const char *argv[], int argc)
+{
+ ndptr n;
+ struct macro_definition *p;
+
+ n = lookup(argv[2]);
+ if (n == NULL || (p = macro_getdef(n)) == NULL)
+ m4errx(1, "indir: undefined macro %s.", argv[2]);
+ argv[1] = p->defn;
+
+ eval(argv+1, argc-1, p->type, is_traced(n));
+}
+
+void
+dobuiltin(const char *argv[], int argc)
+{
+ ndptr p;
+
+ argv[1] = NULL;
+ p = macro_getbuiltin(argv[2]);
+ if (p != NULL)
+ eval(argv+1, argc-1, macro_builtin_type(p), is_traced(p));
+ else
+ m4errx(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(int);
+static char *twiddle(const char *);
+static char *getstring(void);
+static void exit_regerror(int, const char *, regex_t *) __dead;
+static void do_subst(const char *, const char *, regex_t *, const char *,
+ regmatch_t *);
+static void do_regexpindex(const char *, const char *, regex_t *, regmatch_t *);
+static void do_regexp(const char *, const char *, regex_t *, const char *, regmatch_t *);
+static void add_sub(size_t, 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(const char *c, size_t n)
+{
+ if (n == 0)
+ return;
+ while (current + n > bufsize) {
+ if (bufsize == 0)
+ bufsize = 1024;
+ else
+ bufsize *= 2;
+ buffer = xrealloc(buffer, bufsize, NULL);
+ }
+ memcpy(buffer+current, c, n);
+ current += n;
+}
+
+static void
+addchar(int c)
+{
+ if (current +1 > bufsize) {
+ if (bufsize == 0)
+ bufsize = 1024;
+ else
+ bufsize *= 2;
+ buffer = xrealloc(buffer, bufsize, NULL);
+ }
+ buffer[current++] = c;
+}
+
+static char *
+getstring(void)
+{
+ addchar('\0');
+ current = 0;
+ return buffer;
+}
+
+
+static void
+exit_regerror(int er, const char *pat, regex_t *re)
+{
+ size_t errlen;
+ char *errbuf;
+
+ errlen = regerror(er, re, NULL, 0);
+ errbuf = xalloc(errlen,
+ "malloc in regerror: %lu", (unsigned long)errlen);
+ regerror(er, re, errbuf, errlen);
+ m4errx(1, "regular expression error: %s for: `%s'", errbuf, pat);
+}
+
+static void
+add_sub(size_t n, const char *string, regex_t *re, regmatch_t *pm)
+{
+ if (n > re->re_nsub) {
+ if (!quiet)
+ warnx("No subexpression %zu", n);
+ if (fatal_warnings)
+ exit(EXIT_FAILURE);
+ }
+ /* 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(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((unsigned char)p[1])) {
+ add_sub(*(++p) - '0', string, re, pm);
+ continue;
+ }
+ }
+ addchar(*p);
+ }
+}
+
+static void
+do_subst(const char *pat, 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;
+ buffer[current] = '\0';
+ }
+ while (*string)
+ addchar(*string++);
+ if (error != REG_NOMATCH)
+ exit_regerror(error, pat, re);
+ pbstr(string);
+}
+
+static void
+do_regexp(const char *pat, 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, pat, re);
+ }
+}
+
+static void
+do_regexpindex(const char *pat, 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, pat, 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(const char *p)
+{
+ /* + at start of regexp is a normal character for Gnu m4 */
+ if (*p == '^') {
+ addchar(*p);
+ p++;
+ }
+ if (*p == '+') {
+ addchar('\\');
+ }
+ /* 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();
+}
+
+static int
+checkempty(const char *argv[], int argc)
+{
+ const char *s;
+ size_t len;
+
+ if (argc != 3 && argv[3][0] != '\0')
+ return 0;
+
+ if (argc == 3) {
+ if (!quiet)
+ warnx("Too few arguments to patsubst");
+ if (fatal_warnings)
+ exit(EXIT_FAILURE);
+ }
+
+ if (argv[4] && argc > 4)
+ len = strlen(argv[4]);
+ else
+ len = 0;
+ for (s = argv[2]; *s != '\0'; s++) {
+ addchars(argv[4], len);
+ addchar(*s);
+ }
+ return 1;
+}
+
+/* patsubst(string, regexp, opt replacement) */
+/* argv[2]: string
+ * argv[3]: regexp
+ * argv[4]: opt rep
+ */
+void
+dopatsubst(const char *argv[], int argc)
+{
+ if (argc < 3) {
+ if (!quiet)
+ warnx("Too few arguments to patsubst");
+ if (fatal_warnings)
+ exit(EXIT_FAILURE);
+ return;
+ }
+ /* special case: empty regexp */
+ if (!checkempty(argv, argc)) {
+
+ const char *pat;
+ int error;
+ regex_t re;
+ regmatch_t *pmatch;
+ int mode = REG_EXTENDED;
+ size_t l = strlen(argv[3]);
+
+ if (!mimic_gnu ||
+ (argv[3][0] == '^') ||
+ (l > 0 && argv[3][l-1] == '$'))
+ mode |= REG_NEWLINE;
+
+ pat = mimic_gnu ? twiddle(argv[3]) : argv[3];
+ error = regcomp(&re, pat, mode);
+ if (error != 0)
+ exit_regerror(error, pat, &re);
+
+ pmatch = xalloc(sizeof(regmatch_t) * (re.re_nsub+1), NULL);
+ do_subst(pat, argv[2], &re,
+ argc > 4 && argv[4] != NULL ? argv[4] : "", pmatch);
+ free(pmatch);
+ regfree(&re);
+ }
+ pbstr(getstring());
+}
+
+void
+doregexp(const char *argv[], int argc)
+{
+ int error;
+ regex_t re;
+ regmatch_t *pmatch;
+ const char *pat;
+
+ if (argc < 3) {
+ if (!quiet)
+ warnx("Too few arguments to regexp");
+ if (fatal_warnings)
+ exit(EXIT_FAILURE);
+ return;
+ }
+ if (checkempty(argv, argc)) {
+ return;
+ }
+
+ pat = mimic_gnu ? twiddle(argv[3]) : argv[3];
+ error = regcomp(&re, pat, REG_EXTENDED);
+ if (error != 0)
+ exit_regerror(error, pat, &re);
+
+ pmatch = xalloc(sizeof(regmatch_t) * (re.re_nsub+1), NULL);
+ if (argv[4] == NULL || argc == 4)
+ do_regexpindex(pat, argv[2], &re, pmatch);
+ else
+ do_regexp(pat, argv[2], &re, argv[4], pmatch);
+ free(pmatch);
+ regfree(&re);
+}
+
+void
+doformat(const char *argv[], int argc)
+{
+ const char *format = argv[2];
+ int pos = 3;
+ int left_padded;
+ long width;
+ size_t l;
+ const char *thisarg;
+ char temp[2];
+ size_t extra;
+
+ while (*format != 0) {
+ if (*format != '%') {
+ addchar(*format++);
+ continue;
+ }
+
+ format++;
+ if (*format == '%') {
+ addchar(*format++);
+ continue;
+ }
+ if (*format == 0) {
+ addchar('%');
+ break;
+ }
+
+ if (*format == '*') {
+ format++;
+ if (pos >= argc)
+ m4errx(1,
+ "Format with too many format specifiers.");
+ width = strtol(argv[pos++], NULL, 10);
+ } else {
+ char *eformat;
+ width = strtol(format, &eformat, 10);
+ format = eformat;
+ }
+ if (width < 0) {
+ left_padded = 1;
+ width = -width;
+ } else {
+ left_padded = 0;
+ }
+ if (*format == '.') {
+ format++;
+ if (*format == '*') {
+ format++;
+ if (pos >= argc)
+ m4errx(1,
+ "Format with too many format specifiers.");
+ extra = strtol(argv[pos++], NULL, 10);
+ } else {
+ char *eformat;
+ extra = strtol(format, &eformat, 10);
+ format = eformat;
+ }
+ } else {
+ extra = SIZE_T_MAX;
+ }
+ if (pos >= argc)
+ m4errx(1, "Format with too many format specifiers.");
+ switch(*format) {
+ case 's':
+ thisarg = argv[pos++];
+ break;
+ case 'c':
+ temp[0] = strtoul(argv[pos++], NULL, 10);
+ temp[1] = 0;
+ thisarg = temp;
+ break;
+ default:
+ m4errx(1, "Unsupported format specification: %s.",
+ argv[2]);
+ }
+ format++;
+ l = strlen(thisarg);
+ if (l > extra)
+ l = extra;
+ if (!left_padded) {
+ while (l < (size_t)width--)
+ addchar(' ');
+ }
+ addchars(thisarg, l);
+ if (left_padded) {
+ while (l < (size_t)width--)
+ addchar(' ');
+ }
+ }
+ pbstr(getstring());
+}
+
+void
+doesyscmd(const char *cmd)
+{
+ int p[2];
+ pid_t pid, cpid;
+ const char *argv[4];
+ int cc;
+ int status;
+
+ /* Follow gnu m4 documentation: first flush buffers. */
+ fflush(NULL);
+
+ argv[0] = "sh";
+ argv[1] = "-c";
+ argv[2] = 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, __UNCONST(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());
+ }
+}
+
+void
+getdivfile(const char *name)
+{
+ FILE *f;
+ int c;
+
+ f = fopen(name, "r");
+ if (!f)
+ return;
+
+ while ((c = getc(f))!= EOF)
+ putc(c, active);
+ (void) fclose(f);
+}
+
+#ifdef REAL_FREEZE
+void
+freeze_state(const char *fname)
+{
+ FILE *f;
+
+ if ((f = fopen(fname, "wb")) == NULL)
+ m4errx(EXIT_FAILURE, "Can't open output freeze file `%s' (%s)",
+ fname, strerror(errno));
+ fprintf(f, "# This is a frozen state file generated by %s\nV1\n",
+ getprogname());
+ fprintf(f, "Q%zu,%zu\n%s%s\n", strlen(lquote), strlen(rquote),
+ lquote, rquote);
+ fprintf(f, "C%zu,%zu\n%s%s\n", strlen(scommt), strlen(ecommt),
+ scommt, ecommt);
+ dump_state(f);
+ /* XXX: diversions? */
+ fprintf(f, "D-1,0\n");
+ fprintf(f, "# End of frozen state file\n");
+ fclose(f);
+}
+
+void
+thaw_state(const char *fname)
+{
+ char *name = NULL;
+ size_t nl, namelen = 0;
+ char *defn = NULL;
+ size_t dl, defnlen = 0;
+ size_t lineno = 0;
+ char line[1024], *ptr, type;
+ FILE *f;
+
+ if ((f = fopen(fname, "rb")) == NULL)
+ m4errx(EXIT_FAILURE, "Can't open frozen file `%s' (%s)",
+ fname, strerror(errno));
+
+#define GET() if (fgets(line, (int)sizeof(line), f) == NULL) goto out
+#define GETSTR(s, l) if (fread(s, 1, l, f) != l) goto out; else s[l] = '\0'
+
+ GET(); /* comment */
+ GET(); /* version */
+ if ((ptr = strrchr(line, '\n')) != NULL)
+ *ptr = '\0';
+ if (strcmp(line, "V1") != 0)
+ m4errx(EXIT_FAILURE, "Bad frozen version `%s'", line);
+
+ for (;;) {
+ GET();
+ lineno++;
+ switch (*line) {
+ case '\n':
+ continue;
+ case '#':
+ free(name);
+ free(defn);
+ fclose(f);
+ return;
+ default:
+ if (sscanf(line, "%c%zu,%zu\n", &type, &nl, &dl) != 3)
+ m4errx(EXIT_FAILURE, "%s, %zu: Bad line `%s'",
+ fname, lineno, line);
+ break;
+ }
+
+ switch (type) {
+ case 'Q':
+ if (nl >= sizeof(lquote) || dl >= sizeof(rquote))
+ m4errx(EXIT_FAILURE, "%s, %zu: Quote too long",
+ fname, lineno);
+ GETSTR(lquote, nl);
+ GETSTR(rquote, dl);
+ break;
+
+ case 'C':
+ if (nl >= sizeof(scommt) || dl >= sizeof(ecommt))
+ m4errx(EXIT_FAILURE, "%s, %zu: Comment too long",
+ fname, lineno);
+ GETSTR(scommt, nl);
+ GETSTR(ecommt, dl);
+ break;
+
+ case 'T':
+ case 'F':
+ if (nl >= namelen)
+ name = xrealloc(name, namelen = nl + 1,
+ "name grow");
+ if (dl >= defnlen)
+ defn = xrealloc(defn, defnlen = dl + 1,
+ "defn grow");
+ GETSTR(name, nl);
+ GETSTR(defn, dl);
+ macro_pushdef(name, defn);
+ break;
+
+ case 'D':
+ /* XXX: Not implemented */
+ break;
+
+ default:
+ m4errx(EXIT_FAILURE, "%s, %zu: Unknown type %c",
+ fname, lineno,type);
+ }
+ }
+out:
+ m4errx(EXIT_FAILURE, "Unexprected end of file in `%s'", fname);
+}
+#endif
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