-/* Copyright (C) 1989, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved. */
+/* Copyright (C) 1989, 2000 Aladdin Enterprises. All rights reserved. */
-/*$Id: ansi2knr.c $*/
+/*$Id: ansi2knr.c,v 1.3 2000/04/13 03:41:48 lpd Exp $*/
/* Convert ANSI C function definitions to K&R ("traditional C") syntax */
/*
* There are no error messages.
*
* ansi2knr recognizes function definitions by seeing a non-keyword
- * identifier at the left margin, followed by a left parenthesis,
- * with a right parenthesis as the last character on the line,
- * and with a left brace as the first token on the following line
- * (ignoring possible intervening comments), except that a line
+ * identifier at the left margin, followed by a left parenthesis, with a
+ * right parenthesis as the last character on the line, and with a left
+ * brace as the first token on the following line (ignoring possible
+ * intervening comments and/or preprocessor directives), except that a line
* consisting of only
* identifier1(identifier2)
* will not be considered a function definition unless identifier2 is
* the word "void", and a line consisting of
* identifier1(identifier2, <<arbitrary>>)
* will not be considered a function definition.
- * ansi2knr will recognize a multi-line header provided
- * that no intervening line ends with a left or right brace or a semicolon.
- * These algorithms ignore whitespace and comments, except that
- * the function name must be the first thing on the line.
- * The following constructs will confuse it:
+ * ansi2knr will recognize a multi-line header provided that no intervening
+ * line ends with a left or right brace or a semicolon. These algorithms
+ * ignore whitespace, comments, and preprocessor directives, except that
+ * the function name must be the first thing on the line. The following
+ * constructs will confuse it:
* - Any other construct that starts at the left margin and
* follows the above syntax (such as a macro or function call).
* - Some macros that tinker with the syntax of function headers.
* The original and principal author of ansi2knr is L. Peter Deutsch
* <ghost@aladdin.com>. Other authors are noted in the change history
* that follows (in reverse chronological order):
+
+ lpd 2000-04-12 backs out Eggert's changes because of bugs:
+ - concatlits didn't declare the type of its bufend argument;
+ - concatlits didn't't recognize when it was inside a comment;
+ - scanstring could scan backward past the beginning of the string; when
+ - the check for \ + newline in scanstring was unnecessary.
+
+ 2000-03-05 Paul Eggert <eggert@twinsun.com>
+
+ Add support for concatenated string literals.
+ * ansi2knr.c (concatlits): New decl.
+ (main): Invoke concatlits to concatenate string literals.
+ (scanstring): Handle backslash-newline correctly. Work with
+ character constants. Fix bug when scanning backwards through
+ backslash-quote. Check for unterminated strings.
+ (convert1): Parse character constants, too.
+ (appendline, concatlits): New functions.
+ * ansi2knr.1: Document this.
+
+ lpd 1999-08-17 added code to allow preprocessor directives
+ wherever comments are allowed
lpd 1999-04-12 added minor fixes from Pavel Roskin
<pavel_roskin@geocities.com> for clean compilation with
gcc -W -Wall
#define isidfirstchar(ch) (is_alpha(ch) || (ch) == '_')
/* Forward references */
+char *ppdirforward();
+char *ppdirbackward();
char *skipspace();
char *scanstring();
int writeblanks();
goto wl;
if ( fgets(line, (unsigned)(buf + bufsize - line), in) == NULL )
goto wl;
- switch ( *skipspace(more, 1) )
+ switch ( *skipspace(ppdirforward(more), 1) )
{
case '{':
/* Definitely a function header. */
return 0;
}
-/* Skip over whitespace and comments, in either direction. */
+/*
+ * Skip forward or backward over one or more preprocessor directives.
+ */
+char *
+ppdirforward(p)
+ char *p;
+{
+ for (; *p == '#'; ++p) {
+ for (; *p != '\r' && *p != '\n'; ++p)
+ if (*p == 0)
+ return p;
+ if (*p == '\r' && p[1] == '\n')
+ ++p;
+ }
+ return p;
+}
+char *
+ppdirbackward(p, limit)
+ char *p;
+ char *limit;
+{
+ char *np = p;
+
+ for (;; p = --np) {
+ if (*np == '\n' && np[-1] == '\r')
+ --np;
+ for (; np > limit && np[-1] != '\r' && np[-1] != '\n'; --np)
+ if (np[-1] == 0)
+ return np;
+ if (*np != '#')
+ return p;
+ }
+}
+
+/*
+ * Skip over whitespace, comments, and preprocessor directives,
+ * in either direction.
+ */
char *
skipspace(p, dir)
- register char *p;
- register int dir; /* 1 for forward, -1 for backward */
-{ for ( ; ; )
- { while ( is_space(*p) )
- p += dir;
- if ( !(*p == '/' && p[dir] == '*') )
- break;
- p += dir; p += dir;
- while ( !(*p == '*' && p[dir] == '/') )
- { if ( *p == 0 )
- return p; /* multi-line comment?? */
- p += dir;
- }
- p += dir; p += dir;
- }
- return p;
+ char *p;
+ int dir; /* 1 for forward, -1 for backward */
+{
+ for ( ; ; ) {
+ while ( is_space(*p) )
+ p += dir;
+ if ( !(*p == '/' && p[dir] == '*') )
+ break;
+ p += dir; p += dir;
+ while ( !(*p == '*' && p[dir] == '/') ) {
+ if ( *p == 0 )
+ return p; /* multi-line comment?? */
+ p += dir;
+ }
+ p += dir; p += dir;
+ }
+ return p;
}
/* Scan over a quoted string, in either direction. */
char *
scanstring(p, dir)
- register char *p;
- register int dir;
+ char *p;
+ int dir;
{
for (p += dir; ; p += dir)
if (*p == '"' && p[-dir] != '\\')
int
test1(buf)
char *buf;
-{ register char *p = buf;
+{ char *p = buf;
char *bend;
char *endfn;
int contin;
if ( !isidfirstchar(*p) )
return 0; /* no name at left margin */
- bend = skipspace(buf + strlen(buf) - 1, -1);
+ bend = skipspace(ppdirbackward(buf + strlen(buf) - 1, buf), -1);
switch ( *bend )
{
case ';': contin = 0 /*2*/; break;
int header; /* Boolean */
int convert_varargs; /* Boolean */
{ char *endfn;
- register char *p;
+ char *p;
/*
* The breaks table contains pointers to the beginning and end
* of each argument.
git://sourceware.org / automake.git / commitdiff