1  // SPDX-License-Identifier: GPL-2.0-only
  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 */
 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 */
 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 */
 43  void 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 */
 51  void 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 */
 65  void 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 */
 76  char *str_get(struct gstr *gs)
 77  {
 78  	return gs->s;
 79  }
 80  
 81  void *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  
 90  void *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  
 99  void *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  
108  char *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  
119  char *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  }