1 7f11104a 2003-12-11 devnull #include <u.h>
 2 7f11104a 2003-12-11 devnull #include <libc.h>
 3 7f11104a 2003-12-11 devnull #include "libString.h"
 4 7f11104a 2003-12-11 devnull 
 5 7f11104a 2003-12-11 devnull #define STRLEN 128
 6 7f11104a 2003-12-11 devnull 
 7 7f11104a 2003-12-11 devnull extern void
 8 7f11104a 2003-12-11 devnull s_free(String *sp)
 9 7f11104a 2003-12-11 devnull {
10 7f11104a 2003-12-11 devnull 	if (sp == nil)
11 7f11104a 2003-12-11 devnull 		return;
12 7f11104a 2003-12-11 devnull 	lock(&sp->lk);
13 7f11104a 2003-12-11 devnull 	if(--(sp->ref) != 0){
14 7f11104a 2003-12-11 devnull 		unlock(&sp->lk);
15 7f11104a 2003-12-11 devnull 		return;
16 7f11104a 2003-12-11 devnull 	}
17 7f11104a 2003-12-11 devnull 	unlock(&sp->lk);
18 7f11104a 2003-12-11 devnull 
19 7f11104a 2003-12-11 devnull 	if(sp->fixed == 0 && sp->base != nil)
20 7f11104a 2003-12-11 devnull 		free(sp->base);
21 7f11104a 2003-12-11 devnull 	free(sp);
22 7f11104a 2003-12-11 devnull }
23 7f11104a 2003-12-11 devnull 
24 7f11104a 2003-12-11 devnull /* get another reference to a string */
25 7f11104a 2003-12-11 devnull extern String *
26 7f11104a 2003-12-11 devnull s_incref(String *sp)
27 7f11104a 2003-12-11 devnull {
28 7f11104a 2003-12-11 devnull 	lock(&sp->lk);
29 7f11104a 2003-12-11 devnull 	sp->ref++;
30 7f11104a 2003-12-11 devnull 	unlock(&sp->lk);
31 7f11104a 2003-12-11 devnull 
32 7f11104a 2003-12-11 devnull 	return sp;
33 7f11104a 2003-12-11 devnull }
34 7f11104a 2003-12-11 devnull 
35 7f11104a 2003-12-11 devnull /* allocate a String head */
36 7f11104a 2003-12-11 devnull extern String *
37 7f11104a 2003-12-11 devnull _s_alloc(void)
38 7f11104a 2003-12-11 devnull {
39 7f11104a 2003-12-11 devnull 	String *s;
40 7f11104a 2003-12-11 devnull 
41 7f11104a 2003-12-11 devnull 	s = mallocz(sizeof *s, 1);
42 7f11104a 2003-12-11 devnull 	if(s == nil)
43 7f11104a 2003-12-11 devnull 		return s;
44 7f11104a 2003-12-11 devnull 	s->ref = 1;
45 7f11104a 2003-12-11 devnull 	s->fixed = 0;
46 7f11104a 2003-12-11 devnull 	return s;
47 7f11104a 2003-12-11 devnull }
48 7f11104a 2003-12-11 devnull 
49 7f11104a 2003-12-11 devnull /* create a new `short' String */
50 7f11104a 2003-12-11 devnull extern String *
51 7f11104a 2003-12-11 devnull s_newalloc(int len)
52 7f11104a 2003-12-11 devnull {
53 7f11104a 2003-12-11 devnull 	String *sp;
54 7f11104a 2003-12-11 devnull 
55 7f11104a 2003-12-11 devnull 	sp = _s_alloc();
56 7f11104a 2003-12-11 devnull 	if(sp == nil)
57 7f11104a 2003-12-11 devnull 		sysfatal("s_newalloc: %r");
58 7f11104a 2003-12-11 devnull 	setmalloctag(sp, getcallerpc(&len));
59 7f11104a 2003-12-11 devnull 	if(len < STRLEN)
60 7f11104a 2003-12-11 devnull 		len = STRLEN;
61 7f11104a 2003-12-11 devnull 	sp->base = sp->ptr = malloc(len);
62 7f11104a 2003-12-11 devnull 	if (sp->base == nil)
63 7f11104a 2003-12-11 devnull 		sysfatal("s_newalloc: %r");
64 7f11104a 2003-12-11 devnull 	setmalloctag(sp->base, getcallerpc(&len));
65 7f11104a 2003-12-11 devnull 
66 7f11104a 2003-12-11 devnull 	sp->end = sp->base + len;
67 7f11104a 2003-12-11 devnull 	s_terminate(sp);
68 7f11104a 2003-12-11 devnull 	return sp;
69 7f11104a 2003-12-11 devnull }
70 7f11104a 2003-12-11 devnull 
71 7f11104a 2003-12-11 devnull /* create a new `short' String */
72 7f11104a 2003-12-11 devnull extern String *
73 7f11104a 2003-12-11 devnull s_new(void)
74 7f11104a 2003-12-11 devnull {
75 7f11104a 2003-12-11 devnull 	String *sp;
76 7f11104a 2003-12-11 devnull 
77 7f11104a 2003-12-11 devnull 	sp = _s_alloc();
78 7f11104a 2003-12-11 devnull 	if(sp == nil)
79 7f11104a 2003-12-11 devnull 		sysfatal("s_new: %r");
80 7f11104a 2003-12-11 devnull 	sp->base = sp->ptr = malloc(STRLEN);
81 7f11104a 2003-12-11 devnull 	if (sp->base == nil)
82 7f11104a 2003-12-11 devnull 		sysfatal("s_new: %r");
83 7f11104a 2003-12-11 devnull 	sp->end = sp->base + STRLEN;
84 7f11104a 2003-12-11 devnull 	s_terminate(sp);
85 7f11104a 2003-12-11 devnull 	return sp;
86 7f11104a 2003-12-11 devnull }