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 */
file_lookup(const char * name)13 struct 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 */
str_new(void)32 struct 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 */
str_free(struct gstr * gs)43 void 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 */
str_append(struct gstr * gs,const char * s)52 void 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 */
str_printf(struct gstr * gs,const char * fmt,...)66 void 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 */
str_get(struct gstr * gs)77 const char *str_get(struct gstr *gs)
78 {
79 	return gs->s;
80 }
81 
xmalloc(size_t size)82 void *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 
xcalloc(size_t nmemb,size_t size)91 void *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 
xrealloc(void * p,size_t size)100 void *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 
xstrdup(const char * s)109 char *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 
xstrndup(const char * s,size_t n)120 char *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 }
130