1*4887Schin /***********************************************************************
2*4887Schin *                                                                      *
3*4887Schin *               This software is part of the ast package               *
4*4887Schin *           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
5*4887Schin *                      and is licensed under the                       *
6*4887Schin *                  Common Public License, Version 1.0                  *
7*4887Schin *                      by AT&T Knowledge Ventures                      *
8*4887Schin *                                                                      *
9*4887Schin *                A copy of the License is available at                 *
10*4887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
11*4887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*4887Schin *                                                                      *
13*4887Schin *              Information and Software Systems Research               *
14*4887Schin *                            AT&T Research                             *
15*4887Schin *                           Florham Park NJ                            *
16*4887Schin *                                                                      *
17*4887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
18*4887Schin *                  David Korn <dgk@research.att.com>                   *
19*4887Schin *                   Phong Vo <kpv@research.att.com>                    *
20*4887Schin *                                                                      *
21*4887Schin ***********************************************************************/
22*4887Schin #pragma prototyped
23*4887Schin /*
24*4887Schin  * Glenn Fowler
25*4887Schin  * AT&T Bell Laboratories
26*4887Schin  *
27*4887Schin  * string vector load support
28*4887Schin  */
29*4887Schin 
30*4887Schin #include <ast.h>
31*4887Schin #include <vecargs.h>
32*4887Schin 
33*4887Schin /*
34*4887Schin  * load a string vector from lines in buf
35*4887Schin  * buf may be modified on return
36*4887Schin  *
37*4887Schin  * each line in buf is treated as a new vector element
38*4887Schin  * lines with # as first char are comments
39*4887Schin  * \ as the last char joins consecutive lines
40*4887Schin  *
41*4887Schin  * the vector ends with a 0 sentinel
42*4887Schin  *
43*4887Schin  * the string array pointer is returned
44*4887Schin  */
45*4887Schin 
46*4887Schin char**
47*4887Schin vecload(char* buf)
48*4887Schin {
49*4887Schin 	register char*	s;
50*4887Schin 	register int	n;
51*4887Schin 	register char**	p;
52*4887Schin 	char**		vec;
53*4887Schin 
54*4887Schin 	vec = 0;
55*4887Schin 	n = (*buf == '#') ? -1 : 0;
56*4887Schin 	for (s = buf;; s++)
57*4887Schin 	{
58*4887Schin 		if (*s == '\n')
59*4887Schin 		{
60*4887Schin 			if (s > buf && *(s - 1) == '\\') *(s - 1) = *s = ' ';
61*4887Schin 			else
62*4887Schin 			{
63*4887Schin 				*s = 0;
64*4887Schin 				if (*(s + 1) != '#')
65*4887Schin 				{
66*4887Schin 					n++;
67*4887Schin 					if (!*(s + 1)) break;
68*4887Schin 				}
69*4887Schin 			}
70*4887Schin 		}
71*4887Schin 		else if (!*s)
72*4887Schin 		{
73*4887Schin 			n++;
74*4887Schin 			break;
75*4887Schin 		}
76*4887Schin 	}
77*4887Schin 	if (n < 0) n = 0;
78*4887Schin 	if (p = newof(0, char*, n + 3, 0))
79*4887Schin 	{
80*4887Schin 		*p++ = s = buf;
81*4887Schin 		vec = ++p;
82*4887Schin 		if (n > 0) for (;;)
83*4887Schin 		{
84*4887Schin 			if (*s != '#')
85*4887Schin 			{
86*4887Schin 				*p++ = s;
87*4887Schin 				if (--n <= 0) break;
88*4887Schin 			}
89*4887Schin 			while (*s) s++;
90*4887Schin 			s++;
91*4887Schin 		}
92*4887Schin 		*p = 0;
93*4887Schin 		*(vec - 1) = (char*)p;
94*4887Schin 	}
95*4887Schin 	return(vec);
96*4887Schin }
97