projects/linux·blob v5.2 · refs

129 lines · 2.2 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#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 if (gs->s)
46 free(gs->s);
47 gs->s = NULL;
48 gs->len = 0;
49}
50
51/* Append to growable string */
52void str_append(struct gstr *gs, const char *s)
53{
54 size_t l;
55 if (s) {
56 l = strlen(gs->s) + strlen(s) + 1;
57 if (l > gs->len) {
58 gs->s = xrealloc(gs->s, l);
59 gs->len = l;
60 }
61 strcat(gs->s, s);
62 }
63}
64
65/* Append printf formatted string to growable string */
66void str_printf(struct gstr *gs, const char *fmt, ...)
67{
68 va_list ap;
69 char s[10000]; /* big enough... */
70 va_start(ap, fmt);
71 vsnprintf(s, sizeof(s), fmt, ap);
72 str_append(gs, s);
73 va_end(ap);
74}
75
76/* Retrieve value of growable string */
77const char *str_get(struct gstr *gs)
78{
79 return gs->s;
80}
81
82void *xmalloc(size_t size)
83{
84 void *p = malloc(size);
85 if (p)
86 return p;
87 fprintf(stderr, "Out of memory.\n");
88 exit(1);
89}
90
91void *xcalloc(size_t nmemb, size_t size)
92{
93 void *p = calloc(nmemb, size);
94 if (p)
95 return p;
96 fprintf(stderr, "Out of memory.\n");
97 exit(1);
98}
99
100void *xrealloc(void *p, size_t size)
101{
102 p = realloc(p, size);
103 if (p)
104 return p;
105 fprintf(stderr, "Out of memory.\n");
106 exit(1);
107}
108
109char *xstrdup(const char *s)
110{
111 char *p;
112
113 p = strdup(s);
114 if (p)
115 return p;
116 fprintf(stderr, "Out of memory.\n");
117 exit(1);
118}
119
120char *xstrndup(const char *s, size_t n)
121{
122 char *p;
123
124 p = strndup(s, n);
125 if (p)
126 return p;
127 fprintf(stderr, "Out of memory.\n");
128 exit(1);
129}