Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>
4 * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>
5 */
6
7#include <stdarg.h>
8#include <stdlib.h>
9#include <string.h>
10#include "lkc.h"
11
12/* file already present in list? If not add it */
13struct file *file_lookup(const char *name)
14{
15 struct file *file;
16
17 for (file = file_list; file; file = file->next) {
18 if (!strcmp(name, file->name)) {
19 return file;
20 }
21 }
22
23 file = xmalloc(sizeof(*file));
24 memset(file, 0, sizeof(*file));
25 file->name = xstrdup(name);
26 file->next = file_list;
27 file_list = file;
28 return file;
29}
30
31/* Allocate initial growable string */
32struct gstr str_new(void)
33{
34 struct gstr gs;
35 gs.s = xmalloc(sizeof(char) * 64);
36 gs.len = 64;
37 gs.max_width = 0;
38 strcpy(gs.s, "\0");
39 return gs;
40}
41
42/* Free storage for growable string */
43void str_free(struct gstr *gs)
44{
45 free(gs->s);
46 gs->s = NULL;
47 gs->len = 0;
48}
49
50/* Append to growable string */
51void str_append(struct gstr *gs, const char *s)
52{
53 size_t l;
54 if (s) {
55 l = strlen(gs->s) + strlen(s) + 1;
56 if (l > gs->len) {
57 gs->s = xrealloc(gs->s, l);
58 gs->len = l;
59 }
60 strcat(gs->s, s);
61 }
62}
63
64/* Append printf formatted string to growable string */
65void str_printf(struct gstr *gs, const char *fmt, ...)
66{
67 va_list ap;
68 char s[10000]; /* big enough... */
69 va_start(ap, fmt);
70 vsnprintf(s, sizeof(s), fmt, ap);
71 str_append(gs, s);
72 va_end(ap);
73}
74
75/* Retrieve value of growable string */
76char *str_get(struct gstr *gs)
77{
78 return gs->s;
79}
80
81void *xmalloc(size_t size)
82{
83 void *p = malloc(size);
84 if (p)
85 return p;
86 fprintf(stderr, "Out of memory.\n");
87 exit(1);
88}
89
90void *xcalloc(size_t nmemb, size_t size)
91{
92 void *p = calloc(nmemb, size);
93 if (p)
94 return p;
95 fprintf(stderr, "Out of memory.\n");
96 exit(1);
97}
98
99void *xrealloc(void *p, size_t size)
100{
101 p = realloc(p, size);
102 if (p)
103 return p;
104 fprintf(stderr, "Out of memory.\n");
105 exit(1);
106}
107
108char *xstrdup(const char *s)
109{
110 char *p;
111
112 p = strdup(s);
113 if (p)
114 return p;
115 fprintf(stderr, "Out of memory.\n");
116 exit(1);
117}
118
119char *xstrndup(const char *s, size_t n)
120{
121 char *p;
122
123 p = strndup(s, n);
124 if (p)
125 return p;
126 fprintf(stderr, "Out of memory.\n");
127 exit(1);
128}