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121 lines · 2.5 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 struct {
22 const char *name;
23 int lineno;
24 } parent;
25 char name[];
26};
27
28static void die_duplicated_include(struct file *file,
29 const char *parent, int lineno)
30{
31 fprintf(stderr,
32 "%s:%d: error: repeated inclusion of %s\n"
33 "%s:%d: note: location of first inclusion of %s\n",
34 parent, lineno, file->name,
35 file->parent.name, file->parent.lineno, file->name);
36 exit(1);
37}
38
39/* file already present in list? If not add it */
40const char *file_lookup(const char *name,
41 const char *parent_name, int parent_lineno)
42{
43 const char *parent = NULL;
44 struct file *file;
45 size_t len;
46 int hash = hash_str(name);
47
48 if (parent_name)
49 parent = file_lookup(parent_name, NULL, 0);
50
51 hash_for_each_possible(file_hashtable, file, node, hash)
52 if (!strcmp(name, file->name)) {
53 if (!parent_name)
54 return file->name;
55 die_duplicated_include(file, parent, parent_lineno);
56 }
57
58 len = strlen(name);
59 file = xmalloc(sizeof(*file) + len + 1);
60 memset(file, 0, sizeof(*file));
61 memcpy(file->name, name, len);
62 file->name[len] = '\0';
63 file->parent.name = parent;
64 file->parent.lineno = parent_lineno;
65
66 hash_add(file_hashtable, &file->node, hash);
67
68 str_printf(&autoconf_cmd, "\t%s \\\n", name);
69
70 return file->name;
71}
72
73/* Allocate initial growable string */
74struct gstr str_new(void)
75{
76 struct gstr gs;
77 gs.s = xmalloc(sizeof(char) * 64);
78 gs.len = 64;
79 gs.max_width = 0;
80 strcpy(gs.s, "\0");
81 return gs;
82}
83
84/* Free storage for growable string */
85void str_free(struct gstr *gs)
86{
87 free(gs->s);
88 gs->s = NULL;
89 gs->len = 0;
90}
91
92/* Append to growable string */
93void str_append(struct gstr *gs, const char *s)
94{
95 size_t l;
96 if (s) {
97 l = strlen(gs->s) + strlen(s) + 1;
98 if (l > gs->len) {
99 gs->s = xrealloc(gs->s, l);
100 gs->len = l;
101 }
102 strcat(gs->s, s);
103 }
104}
105
106/* Append printf formatted string to growable string */
107void str_printf(struct gstr *gs, const char *fmt, ...)
108{
109 va_list ap;
110 char s[10000]; /* big enough... */
111 va_start(ap, fmt);
112 vsnprintf(s, sizeof(s), fmt, ap);
113 str_append(gs, s);
114 va_end(ap);
115}
116
117/* Retrieve value of growable string */
118char *str_get(const struct gstr *gs)
119{
120 return gs->s;
121}