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/* ========================================================================
* Copyright 1988-2006 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* ========================================================================
*/
/*
* Program: unANSIify
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* 4545 15th Ave NE
* Seattle, WA 98105-4527
* Internet: MRC@CAC.Washington.EDU
*
* Date: 1 June 1995
* Last Edited: 30 August 2006
*/
/* This program is designed to make traditional C sources out of my source
* files which use ANSI syntax. This program depends heavily upon knowledge
* of the way I write code, and is not a general purpose tool. I hope that
* someday someone will provide a general purpose tool...
*/
#include <stdio.h>
#define LINELENGTH 1000
/* Find first non-whitespace
* Accepts: string
* Returns: 0 if no non-whitespace found, or pointer to non-whitespace
*/
char *fndnws (s)
char *s;
{
while ((*s == ' ') || (*s == '\t'))
if ((*s++ == '\n') || !*s) return (char *) 0;
return s;
}
/* Find first whitespace
* Accepts: string
* Returns: 0 if no whitespace found, or pointer to whitespace
*/
char *fndws (s)
char *s;
{
while ((*s != ' ') && (*s != '\t'))
if ((*s++ == '\n') || !*s) return (char *) 0;
return s;
}
/* Find end of comment
* Accepts: string
* Returns: -1 if end of comment found, else 0
*/
int fndcmt (s)
char *s;
{
while (*s && (*s != '\n'))
if ((*s++ == '*') && (*s == '/')) return -1;
return 0;
}
/* Output a line
* Accepts: string
*/
void poot (s)
char *s;
{
if (s) fputs (s,stdout);
}
/* Skip prefix
* Accepts: string
* Returns: updated string
*/
char *skipfx (s)
char *s;
{
char c,*t = s,*tt;
/* skip leading whitespace too */
while ((*s == ' ') || (*s == '\t')) *s++;
if (s != t) {
c = *s; /* save character */
*s = '\0'; /* tie off prefix */
poot (t); /* output prefix */
*s = c; /* restore character */
}
/* a typedef? */
if (((s[0] == 't') && (s[1] == 'y') && (s[2] == 'p') && (s[3] == 'e') &&
(s[4] == 'd') && (s[5] == 'e') && (s[6] == 'f')) &&
(t = fndws (s)) && (t = fndnws (t))) {
if ((t[0] == 'u') && (t[1] == 'n') && (t[2] == 's') && (t[3] == 'i') &&
(t[4] == 'g') && (t[5] == 'n') && (t[6] == 'e') && (t[7] == 'd') &&
(tt = fndws (t+7)) && (tt = fndnws (tt))) t = tt;
c = *t; /* save character */
*t = '\0'; /* tie off prefix */
poot (s); /* output prefix */
*t = c; /* restore character */
s = t; /* new string pointer */
}
/* static with known prefix */
else if (((s[0] == 's') && (s[1] == 't') && (s[2] == 'a') &&
(s[3] == 't') && (s[4] == 'i') && (s[5] == 'c') &&
(s[6] == ' ')) &&
(((s[7] == 'u') && (s[8] == 'n') && (s[9] == 's') &&
(s[10] == 'i') && (s[11] == 'g') && (s[12] == 'n') &&
(s[13] == 'e') && (s[14] == 'd')) ||
((s[7] == 's') && (s[8] == 't') && (s[9] == 'r') &&
(s[10] == 'u') && (s[11] == 'c') && (s[12] == 't')) ||
((s[7] == 'd') && (s[8] == 'o')) ||
((s[9] == 'e') && (s[10] == 'l') && (s[11] == 's') &&
(s[12] == 'e'))) &&
(t = fndws (s)) && (t = fndnws (t)) &&
(t = fndws (t)) && (t = fndnws (t))) {
c = *t; /* save character */
*t = '\0'; /* tie off prefix */
poot (s); /* output prefix */
*t = c; /* restore character */
s = t; /* new string pointer */
}
/* one of the known prefixes? */
else if ((((s[0] == 'u') && (s[1] == 'n') && (s[2] == 's') &&
(s[3] == 'i') && (s[4] == 'g') && (s[5] == 'n') &&
(s[6] == 'e') && (s[7] == 'd')) ||
((s[0] == 's') && (s[1] == 't') && (s[2] == 'r') &&
(s[3] == 'u') && (s[4] == 'c') && (s[5] == 't')) ||
((s[0] == 's') && (s[1] == 't') && (s[2] == 'a') &&
(s[3] == 't') && (s[4] == 'i') && (s[5] == 'c')) ||
((s[0] == 'd') && (s[1] == 'o')) ||
((s[0] == 'e') && (s[1] == 'l') && (s[2] == 's') &&
(s[3] == 'e'))) &&
(t = fndws (s)) && (t = fndnws (t))) {
c = *t; /* save character */
*t = '\0'; /* tie off prefix */
poot (s); /* output prefix */
*t = c; /* restore character */
s = t; /* new string pointer */
}
/* may look like a proto, but isn't */
else if ((s[0] == 'r') && (s[1] == 'e') && (s[2] == 't') && (s[3] == 'u') &&
(s[4] == 'r') && (s[5] == 'n')) {
poot (s);
return 0;
}
return s;
}
/* UnANSI a line
* Accepts: string
*/
void unansi (s)
char *s;
{
char c,*t = s,*u,*v;
while (t[1] && (t[1] != '\n')) t++;
switch (*t) {
case ',': /* continued on next line? */
/* slurp remainder of line */
fgets (t + 1,LINELENGTH - (t + 1 - s),stdin);
unansi (s); /* try again */
break;
case ';': /* function prototype? */
/* yes, tie it off */
*(fndws (fndnws (fndws (fndnws (s))))) = '\0';
printf ("%s ();\n",s); /* and output non-ANSI form */
break;
case ')':
*t = '\0'; /* tie off args */
if (*(t = fndnws (fndws (fndnws (fndws (fndnws (s)))))) == '(') {
*t++ = '\0'; /* tie off */
while ((*t == ' ') || (*t == '\t')) t++;
if ((t[0] == 'v') && (t[1] == 'o') && (t[2] == 'i') && (t[3] == 'd') &&
!t[4]) *t = '\0'; /* make void be same as null */
printf ("%s(",s); /* output start of function */
s = t;
while (*s) { /* for each argument */
while ((*s == ' ') || (*s == '\t')) s++;
for (u = v = s; (*u && (*u != ',') && (*u != '[')); u++)
if ((*u == ' ') || (*u == '\t')) v = u;
c = *u; /* remember delimiter */
*u = '\0'; /* tie off argument name */
while (*++v == '*'); /* remove leading pointer indication */
fputs (v,stdout); /* write variable name */
*(s = u) = c; /* restore delimiter */
while (*s && (*s != ',')) *s++;
if (*s) fputc (*s++,stdout);
}
puts (")"); /* end of function */
while (*t) { /* for each argument */
fputs (" ",stdout);
while ((*t == ' ') || (*t == '\t')) t++;
while (*t && (*t != ',')) fputc (*t++,stdout);
puts (";");
if (*t == ',') t++;
}
}
else printf ("%s)",s); /* say what?? */
break;
default: /* doesn't look like a function */
poot (s);
}
}
main ()
{
char *s,*t,line[LINELENGTH];
int c;
while (s = fgets (line,LINELENGTH,stdin)) switch (line[0]) {
case '/': /* comment */
if ((s[1] != '*') || fndcmt (s+2)) poot (line);
else do poot (line);
while (!fndcmt (line) && (s = fgets (line,LINELENGTH,stdin)));
break;
case '{': /* open function */
case '}': /* close function */
case '\f': /* formfeed */
case '\n': /* newline */
case '#': /* preprocessor command */
poot (line);
break;
case '\t': /* whitespace */
case ' ':
/* look like function arg def in structure? */
if ((t = skipfx (line)) && (s = fndws (t)) && (s = fndnws (s)) &&
(((*s == '(') && (s[1] == '*')) ||
((*s == '*') && (s[1] == '(') && (s[2] == '*'))) &&
(s = fndws (s)) && (s[-1] == ')') && (s = fndnws (s)) && (*s == '('))
unansi (t);
else poot (t);
break;
default: /* begins with anything else */
/* look like function proto or def? */
if ((t = skipfx (line)) && (s = fndws (t)) && (s = fndnws (s)) &&
(s = fndws (s)) && (s = fndnws (s)) && (*s == '('))
unansi (t);
else poot (t);
break;
}
}
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