1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * Copyright (C) 2002-2005 Roman Zippel <zippe
4 * Copyright (C) 2002-2005 Sam Ravnborg <sam@r
5 */
6
7 #include <stdarg.h>
8 #include <stdlib.h>
9 #include <string.h>
10
11 #include <hash.h>
12 #include <hashtable.h>
13 #include <xalloc.h>
14 #include "lkc.h"
15
16 /* hash table of all parsed Kconfig files */
17 static HASHTABLE_DEFINE(file_hashtable, 1U <<
18
19 struct file {
20 struct hlist_node node;
21 char name[];
22 };
23
24 /* file already present in list? If not add it
25 const char *file_lookup(const char *name)
26 {
27 struct file *file;
28 size_t len;
29 int hash = hash_str(name);
30
31 hash_for_each_possible(file_hashtable,
32 if (!strcmp(name, file->name))
33 return file->name;
34
35 len = strlen(name);
36 file = xmalloc(sizeof(*file) + len + 1
37 memset(file, 0, sizeof(*file));
38 memcpy(file->name, name, len);
39 file->name[len] = '\0';
40
41 hash_add(file_hashtable, &file->node,
42
43 str_printf(&autoconf_cmd, "\t%s \\\n",
44
45 return file->name;
46 }
47
48 /* Allocate initial growable string */
49 struct gstr str_new(void)
50 {
51 struct gstr gs;
52 gs.s = xmalloc(sizeof(char) * 64);
53 gs.len = 64;
54 gs.max_width = 0;
55 strcpy(gs.s, "\0");
56 return gs;
57 }
58
59 /* Free storage for growable string */
60 void str_free(struct gstr *gs)
61 {
62 free(gs->s);
63 gs->s = NULL;
64 gs->len = 0;
65 }
66
67 /* Append to growable string */
68 void str_append(struct gstr *gs, const char *s
69 {
70 size_t l;
71 if (s) {
72 l = strlen(gs->s) + strlen(s)
73 if (l > gs->len) {
74 gs->s = xrealloc(gs->s
75 gs->len = l;
76 }
77 strcat(gs->s, s);
78 }
79 }
80
81 /* Append printf formatted string to growable
82 void str_printf(struct gstr *gs, const char *f
83 {
84 va_list ap;
85 char s[10000]; /* big enough... */
86 va_start(ap, fmt);
87 vsnprintf(s, sizeof(s), fmt, ap);
88 str_append(gs, s);
89 va_end(ap);
90 }
91
92 /* Retrieve value of growable string */
93 char *str_get(const struct gstr *gs)
94 {
95 return gs->s;
96 }
97
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