projects/linux·blob v6.13 · refs

96 lines · 1.9 KiB

1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002-2005 Roman Zippel <[email protected]>
4 * Copyright (C) 2002-2005 Sam Ravnborg <[email protected]>
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 */
17static HASHTABLE_DEFINE(file_hashtable, 1U << 11);
18
19struct file {
20 struct hlist_node node;
21 char name[];
22};
23
24/* file already present in list? If not add it */
25const 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, file, node, hash)
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, hash);
42
43 str_printf(&autoconf_cmd, "\t%s \\\n", name);
44
45 return file->name;
46}
47
48/* Allocate initial growable string */
49struct 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 */
60void 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 */
68void str_append(struct gstr *gs, const char *s)
69{
70 size_t l;
71 if (s) {
72 l = strlen(gs->s) + strlen(s) + 1;
73 if (l > gs->len) {
74 gs->s = xrealloc(gs->s, l);
75 gs->len = l;
76 }
77 strcat(gs->s, s);
78 }
79}
80
81/* Append printf formatted string to growable string */
82void str_printf(struct gstr *gs, const char *fmt, ...)
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 */
93char *str_get(const struct gstr *gs)
94{
95 return gs->s;
96}