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Import OpenBSD m4 as of today.

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This commit is contained in:
Juli Mallett 2002-02-16 21:27:48 +00:00
parent 0f3bdf5df9
commit e3d8671772
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor/OpenBSD/dist/; revision=90744
7 changed files with 3491 additions and 0 deletions
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1094
usr.bin/m4/eval.c Normal file
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usr.bin/m4/expr.c Normal file
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/* $OpenBSD: expr.c,v 1.12 2002/02/16 21:27:48 millert Exp $ */
/* $NetBSD: expr.c,v 1.7 1995/09/28 05:37:31 tls Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ozan Yigit at York 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.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)expr.c 8.2 (Berkeley) 4/29/95";
#else
static char rcsid[] = "$OpenBSD: expr.c,v 1.12 2002/02/16 21:27:48 millert Exp $";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
#include <ctype.h>
#include <err.h>
#include <stddef.h>
#include <stdio.h>
#include "mdef.h"
#include "extern.h"
/*
* expression evaluator: performs a standard recursive
* descent parse to evaluate any expression permissible
* within the following grammar:
*
* expr : query EOS
* query : lor
* | lor "?" query ":" query
* lor : land { "||" land }
* land : not { "&&" not }
* not : eqrel
* | '!' not
* eqrel : shift { eqrelop shift }
* shift : primary { shop primary }
* primary : term { addop term }
* term : exp { mulop exp }
* exp : unary { expop unary }
* unary : factor
* | unop unary
* factor : constant
* | "(" query ")"
* constant: num
* | "'" CHAR "'"
* num : DIGIT
* | DIGIT num
* shop : "<<"
* | ">>"
* eqrel : "="
* | "=="
* | "!="
* | "<"
* | ">"
* | "<="
* | ">="
*
*
* This expression evaluator is lifted from a public-domain
* C Pre-Processor included with the DECUS C Compiler distribution.
* It is hacked somewhat to be suitable for m4.
*
* Originally by: Mike Lutz
* Bob Harper
*/
#define EQL 0
#define NEQ 1
#define LSS 2
#define LEQ 3
#define GTR 4
#define GEQ 5
#define OCTAL 8
#define DECIMAL 10
#define HEX 16
static const char *nxtch; /* Parser scan pointer */
static const char *where;
static int query(void);
static int lor(void);
static int land(void);
static int not(void);
static int eqrel(void);
static int shift(void);
static int primary(void);
static int term(void);
static int exp(void);
static int unary(void);
static int factor(void);
static int constant(void);
static int num(void);
static int geteqrel(void);
static int skipws(void);
static void experr(const char *);
/*
* For longjmp
*/
#include <setjmp.h>
static jmp_buf expjump;
/*
* macros:
* ungetch - Put back the last character examined.
* getch - return the next character from expr string.
*/
#define ungetch() nxtch--
#define getch() *nxtch++
int
expr(expbuf)
const char *expbuf;
{
int rval;
nxtch = expbuf;
where = expbuf;
if (setjmp(expjump) != 0)
return FALSE;
rval = query();
if (skipws() == EOS)
return rval;
printf("m4: ill-formed expression.\n");
return FALSE;
}
/*
* query : lor | lor '?' query ':' query
*/
static int
query()
{
int bool, true_val, false_val;
bool = lor();
if (skipws() != '?') {
ungetch();
return bool;
}
true_val = query();
if (skipws() != ':')
experr("bad query");
false_val = query();
return bool ? true_val : false_val;
}
/*
* lor : land { '||' land }
*/
static int
lor()
{
int c, vl, vr;
vl = land();
while ((c = skipws()) == '|') {
if (getch() != '|')
ungetch();
vr = land();
vl = vl || vr;
}
ungetch();
return vl;
}
/*
* land : not { '&&' not }
*/
static int
land()
{
int c, vl, vr;
vl = not();
while ((c = skipws()) == '&') {
if (getch() != '&')
ungetch();
vr = not();
vl = vl && vr;
}
ungetch();
return vl;
}
/*
* not : eqrel | '!' not
*/
static int
not()
{
int val, c;
if ((c = skipws()) == '!' && getch() != '=') {
ungetch();
val = not();
return !val;
}
if (c == '!')
ungetch();
ungetch();
return eqrel();
}
/*
* eqrel : shift { eqrelop shift }
*/
static int
eqrel()
{
int vl, vr, eqrel;
vl = shift();
while ((eqrel = geteqrel()) != -1) {
vr = shift();
switch (eqrel) {
case EQL:
vl = (vl == vr);
break;
case NEQ:
vl = (vl != vr);
break;
case LEQ:
vl = (vl <= vr);
break;
case LSS:
vl = (vl < vr);
break;
case GTR:
vl = (vl > vr);
break;
case GEQ:
vl = (vl >= vr);
break;
}
}
return vl;
}
/*
* shift : primary { shop primary }
*/
static int
shift()
{
int vl, vr, c;
vl = primary();
while (((c = skipws()) == '<' || c == '>') && getch() == c) {
vr = primary();
if (c == '<')
vl <<= vr;
else
vl >>= vr;
}
if (c == '<' || c == '>')
ungetch();
ungetch();
return vl;
}
/*
* primary : term { addop term }
*/
static int
primary()
{
int c, vl, vr;
vl = term();
while ((c = skipws()) == '+' || c == '-') {
vr = term();
if (c == '+')
vl += vr;
else
vl -= vr;
}
ungetch();
return vl;
}
/*
* <term> := <exp> { <mulop> <exp> }
*/
static int
term()
{
int c, vl, vr;
vl = exp();
while ((c = skipws()) == '*' || c == '/' || c == '%') {
vr = exp();
switch (c) {
case '*':
vl *= vr;
break;
case '/':
if (vr == 0)
errx(1, "division by zero in eval.");
else
vl /= vr;
break;
case '%':
if (vr == 0)
errx(1, "modulo zero in eval.");
else
vl %= vr;
break;
}
}
ungetch();
return vl;
}
/*
* <term> := <unary> { <expop> <unary> }
*/
static int
exp()
{
int c, vl, vr, n;
vl = unary();
switch (c = skipws()) {
case '*':
if (getch() != '*') {
ungetch();
break;
}
case '^':
vr = exp();
n = 1;
while (vr-- > 0)
n *= vl;
return n;
}
ungetch();
return vl;
}
/*
* unary : factor | unop unary
*/
static int
unary()
{
int val, c;
if ((c = skipws()) == '+' || c == '-' || c == '~') {
val = unary();
switch (c) {
case '+':
return val;
case '-':
return -val;
case '~':
return ~val;
}
}
ungetch();
return factor();
}
/*
* factor : constant | '(' query ')'
*/
static int
factor()
{
int val;
if (skipws() == '(') {
val = query();
if (skipws() != ')')
experr("bad factor");
return val;
}
ungetch();
return constant();
}
/*
* constant: num | 'char'
* Note: constant() handles multi-byte constants
*/
static int
constant()
{
int i;
int value;
int c;
int v[sizeof(int)];
if (skipws() != '\'') {
ungetch();
return num();
}
for (i = 0; i < sizeof(int); i++) {
if ((c = getch()) == '\'') {
ungetch();
break;
}
if (c == '\\') {
switch (c = getch()) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
ungetch();
c = num();
break;
case 'n':
c = 012;
break;
case 'r':
c = 015;
break;
case 't':
c = 011;
break;
case 'b':
c = 010;
break;
case 'f':
c = 014;
break;
}
}
v[i] = c;
}
if (i == 0 || getch() != '\'')
experr("illegal character constant");
for (value = 0; --i >= 0;) {
value <<= 8;
value += v[i];
}
return value;
}
/*
* num : digit | num digit
*/
static int
num()
{
int rval, c, base;
int ndig;
rval = 0;
ndig = 0;
c = skipws();
if (c == '0') {
c = skipws();
if (c == 'x' || c == 'X') {
base = HEX;
c = skipws();
} else {
base = OCTAL;
ndig++;
}
} else
base = DECIMAL;
for(;;) {
switch(c) {
case '8': case '9':
if (base == OCTAL)
goto bad_digit;
/*FALLTHRU*/
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
rval *= base;
rval += c - '0';
break;
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
c = tolower(c);
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
if (base == HEX) {
rval *= base;
rval += c - 'a' + 10;
break;
}
/*FALLTHRU*/
default:
goto bad_digit;
}
c = getch();
ndig++;
}
bad_digit:
ungetch();
if (ndig == 0)
experr("bad constant");
return rval;
}
/*
* eqrel : '=' | '==' | '!=' | '<' | '>' | '<=' | '>='
*/
static int
geteqrel()
{
int c1, c2;
c1 = skipws();
c2 = getch();
switch (c1) {
case '=':
if (c2 != '=')
ungetch();
return EQL;
case '!':
if (c2 == '=')
return NEQ;
ungetch();
ungetch();
return -1;
case '<':
if (c2 == '=')
return LEQ;
ungetch();
return LSS;
case '>':
if (c2 == '=')
return GEQ;
ungetch();
return GTR;
default:
ungetch();
ungetch();
return -1;
}
}
/*
* Skip over any white space and return terminating char.
*/
static int
skipws()
{
int c;
while ((c = getch()) <= ' ' && c > EOS)
;
return c;
}
/*
* resets environment to eval(), prints an error
* and forces eval to return FALSE.
*/
static void
experr(msg)
const char *msg;
{
printf("m4: %s in expr %s.\n", msg, where);
longjmp(expjump, -1);
}

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/* $OpenBSD: extern.h,v 1.29 2002/02/16 21:27:48 millert Exp $ */
/* $NetBSD: extern.h,v 1.3 1996/01/13 23:25:24 pk Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ozan Yigit at York 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.
*
* @(#)extern.h 8.1 (Berkeley) 6/6/93
*/
/* eval.c */
extern void eval(const char *[], int, int);
extern void dodefine(const char *, const char *);
extern unsigned long expansion_id;
/* expr.c */
extern int expr(const char *);
/* gnum4.c */
extern void addtoincludepath(const char *);
extern struct input_file *fopen_trypath(struct input_file *, const char *);
extern void doindir(const char *[], int);
extern void dobuiltin(const char *[], int);
extern void dopatsubst(const char *[], int);
extern void doregexp(const char *[], int);
extern void doprintlineno(struct input_file *);
extern void doprintfilename(struct input_file *);
extern void doesyscmd(const char *);
/* look.c */
extern ndptr addent(const char *);
extern unsigned hash(const char *);
extern ndptr lookup(const char *);
extern void remhash(const char *, int);
/* main.c */
extern void outputstr(const char *);
extern int builtin_type(const char *);
extern char *builtin_realname(int);
/* misc.c */
extern void chrsave(int);
extern char *compute_prevep(void);
extern void getdiv(int);
extern ptrdiff_t indx(const char *, const char *);
extern void initspaces(void);
extern void killdiv(void);
extern void onintr(int);
extern void pbnum(int);
extern void pbunsigned(unsigned long);
extern void pbstr(const char *);
extern void putback(int);
extern void *xalloc(size_t);
extern char *xstrdup(const char *);
extern void usage(void);
extern void resizedivs(int);
extern size_t buffer_mark(void);
extern void dump_buffer(FILE *, size_t);
extern int obtain_char(struct input_file *);
extern void set_input(struct input_file *, FILE *, const char *);
extern void release_input(struct input_file *);
/* speeded-up versions of chrsave/putback */
#define PUTBACK(c) \
do { \
if (bp >= endpbb) \
enlarge_bufspace(); \
*bp++ = (c); \
} while(0)
#define CHRSAVE(c) \
do { \
if (ep >= endest) \
enlarge_strspace(); \
*ep++ = (c); \
} while(0)
/* and corresponding exposure for local symbols */
extern void enlarge_bufspace(void);
extern void enlarge_strspace(void);
extern char *endpbb;
extern char *endest;
/* trace.c */
extern void mark_traced(const char *, int);
extern int is_traced(const char *);
extern void trace_file(const char *);
extern ssize_t trace(const char **, int, struct input_file *);
extern void finish_trace(size_t);
extern int traced_macros;
extern void set_trace_flags(const char *);
extern FILE *traceout;
extern ndptr hashtab[]; /* hash table for macros etc. */
extern stae *mstack; /* stack of m4 machine */
extern char *sstack; /* shadow stack, for string space extension */
extern FILE *active; /* active output file pointer */
extern struct input_file infile[];/* input file stack (0=stdin) */
extern FILE **outfile; /* diversion array(0=bitbucket) */
extern int maxout; /* maximum number of diversions */
extern int fp; /* m4 call frame pointer */
extern int ilevel; /* input file stack pointer */
extern int oindex; /* diversion index. */
extern int sp; /* current m4 stack pointer */
extern char *bp; /* first available character */
extern char *buf; /* push-back buffer */
extern char *bufbase; /* buffer base for this ilevel */
extern char *bbase[]; /* buffer base per ilevel */
extern char ecommt[MAXCCHARS+1];/* end character for comment */
extern char *ep; /* first free char in strspace */
extern char lquote[MAXCCHARS+1];/* left quote character (`) */
extern char *m4wraps; /* m4wrap string default. */
extern char *null; /* as it says.. just a null. */
extern char rquote[MAXCCHARS+1];/* right quote character (') */
extern char scommt[MAXCCHARS+1];/* start character for comment */
extern int mimic_gnu; /* behaves like gnu-m4 */

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/* $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());
}
}

151
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@ -0,0 +1,151 @@
/* $OpenBSD: look.c,v 1.9 2002/02/16 21:27:48 millert Exp $ */
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ozan Yigit at York 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.
*/
#ifndef lint
static char sccsid[] = "@(#)look.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
/*
* look.c
* Facility: m4 macro processor
* by: oz
*/
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include "mdef.h"
#include "stdd.h"
#include "extern.h"
static void freent(ndptr);
unsigned
hash(name)
const char *name;
{
unsigned int h = 0;
while (*name)
h = (h << 5) + h + *name++;
return (h);
}
/*
* find name in the hash table
*/
ndptr
lookup(name)
const char *name;
{
ndptr p;
unsigned int h;
h = hash(name);
for (p = hashtab[h % HASHSIZE]; p != nil; p = p->nxtptr)
if (h == p->hv && STREQ(name, p->name))
break;
return (p);
}
/*
* hash and create an entry in the hash table.
* The new entry is added in front of a hash bucket.
*/
ndptr
addent(name)
const char *name;
{
unsigned int h;
ndptr p;
h = hash(name);
p = (ndptr) xalloc(sizeof(struct ndblock));
p->nxtptr = hashtab[h % HASHSIZE];
hashtab[h % HASHSIZE] = p;
p->name = xstrdup(name);
p->hv = h;
return p;
}
static void
freent(p)
ndptr p;
{
free((char *) p->name);
if (p->defn != null)
free((char *) p->defn);
free((char *) p);
}
/*
* remove an entry from the hashtable
*/
void
remhash(name, all)
const char *name;
int all;
{
unsigned int h;
ndptr xp, tp, mp;
h = hash(name);
mp = hashtab[h % HASHSIZE];
tp = nil;
while (mp != nil) {
if (mp->hv == h && STREQ(mp->name, name)) {
mp = mp->nxtptr;
if (tp == nil) {
freent(hashtab[h % HASHSIZE]);
hashtab[h % HASHSIZE] = mp;
}
else {
xp = tp->nxtptr;
tp->nxtptr = mp;
freent(xp);
}
if (!all)
break;
}
else {
tp = mp;
mp = mp->nxtptr;
}
}
}

636
usr.bin/m4/main.c Normal file
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@ -0,0 +1,636 @@
/* $OpenBSD: main.c,v 1.52 2002/02/16 21:27:48 millert Exp $ */
/* $NetBSD: main.c,v 1.12 1997/02/08 23:54:49 cgd Exp $ */
/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ozan Yigit at York 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$OpenBSD: main.c,v 1.52 2002/02/16 21:27:48 millert Exp $";
#endif
#endif /* not lint */
/*
* main.c
* Facility: m4 macro processor
* by: oz
*/
#include <sys/types.h>
#include <assert.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stddef.h>
#include <stdlib.h>
#include <err.h>
#include "mdef.h"
#include "stdd.h"
#include "extern.h"
#include "pathnames.h"
ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */
stae *mstack; /* stack of m4 machine */
char *sstack; /* shadow stack, for string space extension */
static size_t STACKMAX; /* current maximum size of stack */
int sp; /* current m4 stack pointer */
int fp; /* m4 call frame pointer */
struct input_file infile[MAXINP];/* input file stack (0=stdin) */
FILE **outfile; /* diversion array(0=bitbucket)*/
int maxout;
FILE *active; /* active output file pointer */
int ilevel = 0; /* input file stack pointer */
int oindex = 0; /* diversion index.. */
char *null = ""; /* as it says.. just a null.. */
char *m4wraps = ""; /* m4wrap string default.. */
char lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */
char rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */
char scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */
char ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */
struct keyblk keywrds[] = { /* m4 keywords to be installed */
{ "include", INCLTYPE },
{ "sinclude", SINCTYPE },
{ "define", DEFITYPE },
{ "defn", DEFNTYPE },
{ "divert", DIVRTYPE | NOARGS },
{ "expr", EXPRTYPE },
{ "eval", EXPRTYPE },
{ "substr", SUBSTYPE },
{ "ifelse", IFELTYPE },
{ "ifdef", IFDFTYPE },
{ "len", LENGTYPE },
{ "incr", INCRTYPE },
{ "decr", DECRTYPE },
{ "dnl", DNLNTYPE | NOARGS },
{ "changequote", CHNQTYPE | NOARGS },
{ "changecom", CHNCTYPE | NOARGS },
{ "index", INDXTYPE },
#ifdef EXTENDED
{ "paste", PASTTYPE },
{ "spaste", SPASTYPE },
/* Newer extensions, needed to handle gnu-m4 scripts */
{ "indir", INDIRTYPE},
{ "builtin", BUILTINTYPE},
{ "patsubst", PATSTYPE},
{ "regexp", REGEXPTYPE},
{ "esyscmd", ESYSCMDTYPE},
{ "__file__", FILENAMETYPE | NOARGS},
{ "__line__", LINETYPE | NOARGS},
#endif
{ "popdef", POPDTYPE },
{ "pushdef", PUSDTYPE },
{ "dumpdef", DUMPTYPE | NOARGS },
{ "shift", SHIFTYPE | NOARGS },
{ "translit", TRNLTYPE },
{ "undefine", UNDFTYPE },
{ "undivert", UNDVTYPE | NOARGS },
{ "divnum", DIVNTYPE | NOARGS },
{ "maketemp", MKTMTYPE },
{ "errprint", ERRPTYPE | NOARGS },
{ "m4wrap", M4WRTYPE | NOARGS },
{ "m4exit", EXITTYPE | NOARGS },
{ "syscmd", SYSCTYPE },
{ "sysval", SYSVTYPE | NOARGS },
{ "traceon", TRACEONTYPE | NOARGS },
{ "traceoff", TRACEOFFTYPE | NOARGS },
#if defined(unix) || defined(__unix__)
{ "unix", SELFTYPE | NOARGS },
#else
#ifdef vms
{ "vms", SELFTYPE | NOARGS },
#endif
#endif
};
#define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk))
extern int optind;
extern char *optarg;
#define MAXRECORD 50
static struct position {
char *name;
unsigned long line;
} quotes[MAXRECORD], paren[MAXRECORD];
static void record(struct position *, int);
static void dump_stack(struct position *, int);
static void macro(void);
static void initkwds(void);
static ndptr inspect(int, char *);
static int do_look_ahead(int, const char *);
static void enlarge_stack(void);
int main(int, char *[]);
int
main(argc,argv)
int argc;
char *argv[];
{
int c;
int n;
char *p;
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, onintr);
initkwds();
initspaces();
STACKMAX = INITSTACKMAX;
mstack = (stae *)xalloc(sizeof(stae) * STACKMAX);
sstack = (char *)xalloc(STACKMAX);
maxout = 0;
outfile = NULL;
resizedivs(MAXOUT);
while ((c = getopt(argc, argv, "gt:d:D:U:o:I:")) != -1)
switch(c) {
case 'D': /* define something..*/
for (p = optarg; *p; p++)
if (*p == '=')
break;
if (*p)
*p++ = EOS;
dodefine(optarg, p);
break;
case 'I':
addtoincludepath(optarg);
break;
case 'U': /* undefine... */
remhash(optarg, TOP);
break;
case 'g':
mimic_gnu = 1;
break;
case 'd':
set_trace_flags(optarg);
break;
case 't':
mark_traced(optarg, 1);
break;
case 'o':
trace_file(optarg);
break;
case '?':
usage();
}
argc -= optind;
argv += optind;
active = stdout; /* default active output */
bbase[0] = bufbase;
if (!argc) {
sp = -1; /* stack pointer initialized */
fp = 0; /* frame pointer initialized */
set_input(infile+0, stdin, "stdin");
/* default input (naturally) */
macro();
} else
for (; argc--; ++argv) {
p = *argv;
if (p[0] == '-' && p[1] == EOS)
set_input(infile, stdin, "stdin");
else if (fopen_trypath(infile, p) == NULL)
err(1, "%s", p);
sp = -1;
fp = 0;
macro();
release_input(infile);
}
if (*m4wraps) { /* anything for rundown ?? */
ilevel = 0; /* in case m4wrap includes.. */
bufbase = bp = buf; /* use the entire buffer */
pbstr(m4wraps); /* user-defined wrapup act */
macro(); /* last will and testament */
}
if (active != stdout)
active = stdout; /* reset output just in case */
for (n = 1; n < maxout; n++) /* default wrap-up: undivert */
if (outfile[n] != NULL)
getdiv(n);
/* remove bitbucket if used */
if (outfile[0] != NULL) {
(void) fclose(outfile[0]);
}
return 0;
}
/*
* Look ahead for `token'.
* (on input `t == token[0]')
* Used for comment and quoting delimiters.
* Returns 1 if `token' present; copied to output.
* 0 if `token' not found; all characters pushed back
*/
static int
do_look_ahead(t, token)
int t;
const char *token;
{
int i;
assert((unsigned char)t == (unsigned char)token[0]);
for (i = 1; *++token; i++) {
t = gpbc();
if (t == EOF || (unsigned char)t != (unsigned char)*token) {
putback(t);
while (--i)
putback(*--token);
return 0;
}
}
return 1;
}
#define LOOK_AHEAD(t, token) (t != EOF && \
(unsigned char)(t)==(unsigned char)(token)[0] && \
do_look_ahead(t,token))
/*
* macro - the work horse..
*/
static void
macro()
{
char token[MAXTOK+1];
int t, l;
ndptr p;
int nlpar;
cycle {
t = gpbc();
if (t == '_' || isalpha(t)) {
p = inspect(t, token);
if (p != nil)
putback(l = gpbc());
if (p == nil || (l != LPAREN &&
(p->type & NEEDARGS) != 0))
outputstr(token);
else {
/*
* real thing.. First build a call frame:
*/
pushf(fp); /* previous call frm */
pushf(p->type); /* type of the call */
pushf(0); /* parenthesis level */
fp = sp; /* new frame pointer */
/*
* now push the string arguments:
*/
pushs1(p->defn); /* defn string */
pushs1(p->name); /* macro name */
pushs(ep); /* start next..*/
if (l != LPAREN && PARLEV == 0) {
/* no bracks */
chrsave(EOS);
if (sp == STACKMAX)
errx(1, "internal stack overflow");
eval((const char **) mstack+fp+1, 2,
CALTYP);
ep = PREVEP; /* flush strspace */
sp = PREVSP; /* previous sp.. */
fp = PREVFP; /* rewind stack...*/
}
}
} else if (t == EOF) {
if (sp > -1) {
warnx( "unexpected end of input, unclosed parenthesis:");
dump_stack(paren, PARLEV);
exit(1);
}
if (ilevel <= 0)
break; /* all done thanks.. */
release_input(infile+ilevel--);
bufbase = bbase[ilevel];
continue;
}
/*
* non-alpha token possibly seen..
* [the order of else if .. stmts is important.]
*/
else if (LOOK_AHEAD(t,lquote)) { /* strip quotes */
nlpar = 0;
record(quotes, nlpar++);
/*
* Opening quote: scan forward until matching
* closing quote has been found.
*/
do {
l = gpbc();
if (LOOK_AHEAD(l,rquote)) {
if (--nlpar > 0)
outputstr(rquote);
} else if (LOOK_AHEAD(l,lquote)) {
record(quotes, nlpar++);
outputstr(lquote);
} else if (l == EOF) {
if (nlpar == 1)
warnx("unclosed quote:");
else
warnx("%d unclosed quotes:", nlpar);
dump_stack(quotes, nlpar);
exit(1);
} else {
if (nlpar > 0) {
if (sp < 0)
putc(l, active);
else
CHRSAVE(l);
}
}
}
while (nlpar != 0);
}
else if (sp < 0 && LOOK_AHEAD(t, scommt)) {
fputs(scommt, active);
for(;;) {
t = gpbc();
if (LOOK_AHEAD(t, ecommt)) {
fputs(ecommt, active);
break;
}
if (t == EOF)
break;
putc(t, active);
}
}
else if (sp < 0) { /* not in a macro at all */
putc(t, active); /* output directly.. */
}
else switch(t) {
case LPAREN:
if (PARLEV > 0)
chrsave(t);
while (isspace(l = gpbc()))
; /* skip blank, tab, nl.. */
putback(l);
record(paren, PARLEV++);
break;
case RPAREN:
if (--PARLEV > 0)
chrsave(t);
else { /* end of argument list */
chrsave(EOS);
if (sp == STACKMAX)
errx(1, "internal stack overflow");
eval((const char **) mstack+fp+1, sp-fp,
CALTYP);
ep = PREVEP; /* flush strspace */
sp = PREVSP; /* previous sp.. */
fp = PREVFP; /* rewind stack...*/
}
break;
case COMMA:
if (PARLEV == 1) {
chrsave(EOS); /* new argument */
while (isspace(l = gpbc()))
;
putback(l);
pushs(ep);
} else
chrsave(t);
break;
default:
if (LOOK_AHEAD(t, scommt)) {
char *p;
for (p = scommt; *p; p++)
chrsave(*p);
for(;;) {
t = gpbc();
if (LOOK_AHEAD(t, ecommt)) {
for (p = ecommt; *p; p++)
chrsave(*p);
break;
}
if (t == EOF)
break;
CHRSAVE(t);
}
} else
CHRSAVE(t); /* stack the char */
break;
}
}
}
/*
* output string directly, without pushing it for reparses.
*/
void
outputstr(s)
const char *s;
{
if (sp < 0)
while (*s)
putc(*s++, active);
else
while (*s)
CHRSAVE(*s++);
}
/*
* build an input token..
* consider only those starting with _ or A-Za-z. This is a
* combo with lookup to speed things up.
*/
static ndptr
inspect(c, tp)
int c;
char *tp;
{
char *name = tp;
char *etp = tp+MAXTOK;
ndptr p;
unsigned int h;
h = *tp++ = c;
while ((isalnum(c = gpbc()) || c == '_') && tp < etp)
h = (h << 5) + h + (*tp++ = c);
if (c != EOF)
PUTBACK(c);
*tp = EOS;
/* token is too long, it won't match anything, but it can still
* be output. */
if (tp == ep) {
outputstr(name);
while (isalnum(c = gpbc()) || c == '_') {
if (sp < 0)
putc(c, active);
else
CHRSAVE(c);
}
*name = EOS;
return nil;
}
for (p = hashtab[h % HASHSIZE]; p != nil; p = p->nxtptr)
if (h == p->hv && STREQ(name, p->name))
break;
return p;
}
/*
* initkwds - initialise m4 keywords as fast as possible.
* This very similar to install, but without certain overheads,
* such as calling lookup. Malloc is not used for storing the
* keyword strings, since we simply use the static pointers
* within keywrds block.
*/
static void
initkwds()
{
size_t i;
unsigned int h;
ndptr p;
for (i = 0; i < MAXKEYS; i++) {
h = hash(keywrds[i].knam);
p = (ndptr) xalloc(sizeof(struct ndblock));
p->nxtptr = hashtab[h % HASHSIZE];
hashtab[h % HASHSIZE] = p;
p->name = xstrdup(keywrds[i].knam);
p->defn = null;
p->hv = h;
p->type = keywrds[i].ktyp & TYPEMASK;
if ((keywrds[i].ktyp & NOARGS) == 0)
p->type |= NEEDARGS;
}
}
/* Look up a builtin type, even if overridden by the user */
int
builtin_type(key)
const char *key;
{
int i;
for (i = 0; i != MAXKEYS; i++)
if (STREQ(keywrds[i].knam, key))
return keywrds[i].ktyp;
return -1;
}
char *
builtin_realname(n)
int n;
{
int i;
for (i = 0; i != MAXKEYS; i++)
if (((keywrds[i].ktyp ^ n) & TYPEMASK) == 0)
return keywrds[i].knam;
return NULL;
}
static void
record(t, lev)
struct position *t;
int lev;
{
if (lev < MAXRECORD) {
t[lev].name = CURRENT_NAME;
t[lev].line = CURRENT_LINE;
}
}
static void
dump_stack(t, lev)
struct position *t;
int lev;
{
int i;
for (i = 0; i < lev; i++) {
if (i == MAXRECORD) {
fprintf(stderr, " ...\n");
break;
}
fprintf(stderr, " %s at line %lu\n",
t[i].name, t[i].line);
}
}
static void
enlarge_stack()
{
STACKMAX *= 2;
mstack = realloc(mstack, sizeof(stae) * STACKMAX);
sstack = realloc(sstack, STACKMAX);
if (mstack == NULL || sstack == NULL)
errx(1, "Evaluation stack overflow (%lu)",
(unsigned long)STACKMAX);
}

272
usr.bin/m4/trace.c Normal file
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@ -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");
}