1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1986-2009 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                                                                      *
19***********************************************************************/
20#pragma prototyped
21/*
22 * cpp predefined symbol detection support
23 *
24 * with no args stdin is treated as an a.out for
25 * a Reiser derived cpp -- all strings that may
26 * be identifiers are listed on fd 3 (1 if no 3)
27 *
28 * with args the -D argument values are listed on fd 3 (1 if no 3)
29 */
30
31#include <ast.h>
32#include <ctype.h>
33
34int
35main(int argc, char** argv)
36{
37	register int	state;
38	register int	c;
39	register char*	s;
40	Sfio_t*		out;
41
42	NoP(argc);
43	if (dup(3) < 0 || !(out = sfnew(NiL, NiL, -1, 3, SF_WRITE)))
44		out = sfstdout;
45	if (*++argv)
46	{
47		while (s = *argv++)
48			if (*s++ == '-' && *s++ == 'D' && isalpha(*s))
49			{
50				while (*s && *s != '=') sfputc(out, *s++);
51				sfputc(out, '\n');
52			}
53		return 0;
54	}
55	state = 0;
56	for (;;)
57	{
58		switch (c = sfgetc(sfstdin))
59		{
60		case EOF:
61			break;
62		case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
63		case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
64		case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
65		case 's': case 't': case 'u': case 'v': case 'w': case 'x':
66		case 'y': case 'z': case '_':
67		case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
68		case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
69		case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
70		case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
71		case 'Y': case 'Z':
72			state++;
73			sfputc(out, c);
74			continue;
75		case '0': case '1': case '2': case '3': case '4': case '5':
76		case '6': case '7': case '8': case '9':
77			if (state)
78			{
79				sfputc(out, c);
80				continue;
81			}
82			/*FALLTHROUGH*/
83		default:
84			if (state)
85			{
86				sfputc(out, '\n');
87				state = 0;
88			}
89			continue;
90		}
91		break;
92	}
93	return 0;
94}
95