8 * Copyright 2011 The Chromium Authors, All Rights Reserved.
9 * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of the
14 * License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
29 static inline void __attribute__((noreturn)) die(const char *str, ...)
34 fprintf(stderr, "FATAL ERROR: ");
35 vfprintf(stderr, str, ap);
39 static inline void *xmalloc(size_t len)
41 void *new = malloc(len);
44 die("malloc() failed\n");
49 static inline void *xrealloc(void *p, size_t len)
51 void *new = realloc(p, len);
54 die("realloc() failed (len=%d)\n", len);
59 extern char *xstrdup(const char *s);
60 extern char *join_path(const char *path, const char *name);
63 * Check a property of a given length to see if it is all printable and
64 * has a valid terminator. The property can contain either a single string,
65 * or multiple strings each of non-zero length.
67 * @param data The string to check
68 * @param len The string length including terminator
69 * @return 1 if a valid printable string, 0 if not
71 int util_is_printable_string(const void *data, int len);
74 * Parse an escaped character starting at index i in string s. The resulting
75 * character will be returned and the index i will be updated to point at the
76 * character directly after the end of the encoding, this may be the '\0'
77 * terminator of the string.
79 char get_escape_char(const char *s, int *i);
82 * Read a device tree file into a buffer. This will report any errors on
85 * @param filename The filename to read, or - for stdin
86 * @return Pointer to allocated buffer containing fdt, or NULL on error
88 char *utilfdt_read(const char *filename);
91 * Like utilfdt_read(), but also passes back the size of the file read.
93 * @param len If non-NULL, the amount of data we managed to read
95 char *utilfdt_read_len(const char *filename, off_t *len);
98 * Read a device tree file into a buffer. Does not report errors, but only
99 * returns them. The value returned can be passed to strerror() to obtain
100 * an error message for the user.
102 * @param filename The filename to read, or - for stdin
103 * @param buffp Returns pointer to buffer containing fdt
104 * @return 0 if ok, else an errno value representing the error
106 int utilfdt_read_err(const char *filename, char **buffp);
109 * Like utilfdt_read_err(), but also passes back the size of the file read.
111 * @param len If non-NULL, the amount of data we managed to read
113 int utilfdt_read_err_len(const char *filename, char **buffp, off_t *len);
116 * Write a device tree buffer to a file. This will report any errors on
119 * @param filename The filename to write, or - for stdout
120 * @param blob Poiner to buffer containing fdt
121 * @return 0 if ok, -1 on error
123 int utilfdt_write(const char *filename, const void *blob);
126 * Write a device tree buffer to a file. Does not report errors, but only
127 * returns them. The value returned can be passed to strerror() to obtain
128 * an error message for the user.
130 * @param filename The filename to write, or - for stdout
131 * @param blob Poiner to buffer containing fdt
132 * @return 0 if ok, else an errno value representing the error
134 int utilfdt_write_err(const char *filename, const void *blob);
137 * Decode a data type string. The purpose of this string
139 * The string consists of an optional character followed by the type:
140 * Modifier characters:
151 * TODO: Implement ll modifier (8 bytes)
152 * TODO: Implement o type (octal)
154 * @param fmt Format string to process
155 * @param type Returns type found(s/d/u/x), or 0 if none
156 * @param size Returns size found(1,2,4,8) or 4 if none
157 * @return 0 if ok, -1 on error (no type given, or other invalid format)
159 int utilfdt_decode_type(const char *fmt, int *type, int *size);
162 * This is a usage message fragment for the -t option. It is the format
163 * supported by utilfdt_decode_type.
166 #define USAGE_TYPE_MSG \
167 "<type>\ts=string, i=int, u=unsigned, x=hex\n" \
168 "\tOptional modifier prefix:\n" \
169 "\t\thh or b=byte, h=2 byte, l=4 byte (default)";
172 * Print property data in a readable format to stdout
174 * Properties that look like strings will be printed as strings. Otherwise
175 * the data will be displayed either as cells (if len is a multiple of 4
178 * If len is 0 then this function does nothing.
180 * @param data Pointers to property data
181 * @param len Length of property data
183 void utilfdt_print_data(const char *data, int len);
186 * Show source version and exit
188 void util_version(void) __attribute__((noreturn));
191 * Show usage and exit
193 * This helps standardize the output of various utils. You most likely want
194 * to use the usage() helper below rather than call this.
196 * @param errmsg If non-NULL, an error message to display
197 * @param synopsis The initial example usage text (and possible examples)
198 * @param short_opts The string of short options
199 * @param long_opts The structure of long options
200 * @param opts_help An array of help strings (should align with long_opts)
202 void util_usage(const char *errmsg, const char *synopsis,
203 const char *short_opts, struct option const long_opts[],
204 const char * const opts_help[]) __attribute__((noreturn));
207 * Show usage and exit
209 * If you name all your usage variables with usage_xxx, then you can call this
210 * help macro rather than expanding all arguments yourself.
212 * @param errmsg If non-NULL, an error message to display
214 #define usage(errmsg) \
215 util_usage(errmsg, usage_synopsis, usage_short_opts, \
216 usage_long_opts, usage_opts_help)
219 * Call getopt_long() with standard options
221 * Since all util code runs getopt in the same way, provide a helper.
223 #define util_getopt_long() getopt_long(argc, argv, usage_short_opts, \
224 usage_long_opts, NULL)
226 /* Helper for aligning long_opts array */
227 #define a_argument required_argument
229 /* Helper for usage_short_opts string constant */
230 #define USAGE_COMMON_SHORT_OPTS "hV"
232 /* Helper for usage_long_opts option array */
233 #define USAGE_COMMON_LONG_OPTS \
234 {"help", no_argument, NULL, 'h'}, \
235 {"version", no_argument, NULL, 'V'}, \
236 {NULL, no_argument, NULL, 0x0}
238 /* Helper for usage_opts_help array */
239 #define USAGE_COMMON_OPTS_HELP \
240 "Print this help and exit", \
241 "Print version and exit", \
244 /* Helper for getopt case statements */
245 #define case_USAGE_COMMON_FLAGS \
246 case 'h': usage(NULL); \
247 case 'V': util_version(); \
248 case '?': usage("unknown option");