You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
265 lines
7.7 KiB
265 lines
7.7 KiB
#ifndef _UTIL_H |
|
#define _UTIL_H |
|
|
|
#include <stdarg.h> |
|
#include <stdbool.h> |
|
#include <getopt.h> |
|
|
|
/* |
|
* Copyright 2011 The Chromium Authors, All Rights Reserved. |
|
* Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc. |
|
* |
|
* This program is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU General Public License as |
|
* published by the Free Software Foundation; either version 2 of the |
|
* License, or (at your option) any later version. |
|
* |
|
* This program is distributed in the hope that it will be useful, |
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* General Public License for more details. |
|
* |
|
* You should have received a copy of the GNU General Public License |
|
* along with this program; if not, write to the Free Software |
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
|
* USA |
|
*/ |
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) |
|
|
|
#ifdef __GNUC__ |
|
static inline void |
|
__attribute__((noreturn)) __attribute__((format (printf, 1, 2))) |
|
die(const char *str, ...) |
|
#else |
|
static inline void die(const char *str, ...) |
|
#endif |
|
{ |
|
va_list ap; |
|
|
|
va_start(ap, str); |
|
fprintf(stderr, "FATAL ERROR: "); |
|
vfprintf(stderr, str, ap); |
|
va_end(ap); |
|
exit(1); |
|
} |
|
|
|
static inline void *xmalloc(size_t len) |
|
{ |
|
void *new = malloc(len); |
|
|
|
if (!new) |
|
die("malloc() failed\n"); |
|
|
|
return new; |
|
} |
|
|
|
static inline void *xrealloc(void *p, size_t len) |
|
{ |
|
void *new = realloc(p, len); |
|
|
|
if (!new) |
|
die("realloc() failed (len=%zd)\n", len); |
|
|
|
return new; |
|
} |
|
|
|
extern char *xstrdup(const char *s); |
|
|
|
#ifdef __GNUC__ |
|
extern int __attribute__((format (printf, 2, 3))) |
|
xasprintf(char **strp, const char *fmt, ...); |
|
#else |
|
extern int xasprintf(char **strp, const char *fmt, ...); |
|
#endif |
|
extern char *join_path(const char *path, const char *name); |
|
|
|
/** |
|
* Check a property of a given length to see if it is all printable and |
|
* has a valid terminator. The property can contain either a single string, |
|
* or multiple strings each of non-zero length. |
|
* |
|
* @param data The string to check |
|
* @param len The string length including terminator |
|
* @return 1 if a valid printable string, 0 if not |
|
*/ |
|
bool util_is_printable_string(const void *data, int len); |
|
|
|
/* |
|
* Parse an escaped character starting at index i in string s. The resulting |
|
* character will be returned and the index i will be updated to point at the |
|
* character directly after the end of the encoding, this may be the '\0' |
|
* terminator of the string. |
|
*/ |
|
char get_escape_char(const char *s, int *i); |
|
|
|
/** |
|
* Read a device tree file into a buffer. This will report any errors on |
|
* stderr. |
|
* |
|
* @param filename The filename to read, or - for stdin |
|
* @return Pointer to allocated buffer containing fdt, or NULL on error |
|
*/ |
|
char *utilfdt_read(const char *filename); |
|
|
|
/** |
|
* Like utilfdt_read(), but also passes back the size of the file read. |
|
* |
|
* @param len If non-NULL, the amount of data we managed to read |
|
*/ |
|
char *utilfdt_read_len(const char *filename, off_t *len); |
|
|
|
/** |
|
* Read a device tree file into a buffer. Does not report errors, but only |
|
* returns them. The value returned can be passed to strerror() to obtain |
|
* an error message for the user. |
|
* |
|
* @param filename The filename to read, or - for stdin |
|
* @param buffp Returns pointer to buffer containing fdt |
|
* @return 0 if ok, else an errno value representing the error |
|
*/ |
|
int utilfdt_read_err(const char *filename, char **buffp); |
|
|
|
/** |
|
* Like utilfdt_read_err(), but also passes back the size of the file read. |
|
* |
|
* @param len If non-NULL, the amount of data we managed to read |
|
*/ |
|
int utilfdt_read_err_len(const char *filename, char **buffp, off_t *len); |
|
|
|
/** |
|
* Write a device tree buffer to a file. This will report any errors on |
|
* stderr. |
|
* |
|
* @param filename The filename to write, or - for stdout |
|
* @param blob Poiner to buffer containing fdt |
|
* @return 0 if ok, -1 on error |
|
*/ |
|
int utilfdt_write(const char *filename, const void *blob); |
|
|
|
/** |
|
* Write a device tree buffer to a file. Does not report errors, but only |
|
* returns them. The value returned can be passed to strerror() to obtain |
|
* an error message for the user. |
|
* |
|
* @param filename The filename to write, or - for stdout |
|
* @param blob Poiner to buffer containing fdt |
|
* @return 0 if ok, else an errno value representing the error |
|
*/ |
|
int utilfdt_write_err(const char *filename, const void *blob); |
|
|
|
/** |
|
* Decode a data type string. The purpose of this string |
|
* |
|
* The string consists of an optional character followed by the type: |
|
* Modifier characters: |
|
* hh or b 1 byte |
|
* h 2 byte |
|
* l 4 byte, default |
|
* |
|
* Type character: |
|
* s string |
|
* i signed integer |
|
* u unsigned integer |
|
* x hex |
|
* |
|
* TODO: Implement ll modifier (8 bytes) |
|
* TODO: Implement o type (octal) |
|
* |
|
* @param fmt Format string to process |
|
* @param type Returns type found(s/d/u/x), or 0 if none |
|
* @param size Returns size found(1,2,4,8) or 4 if none |
|
* @return 0 if ok, -1 on error (no type given, or other invalid format) |
|
*/ |
|
int utilfdt_decode_type(const char *fmt, int *type, int *size); |
|
|
|
/* |
|
* This is a usage message fragment for the -t option. It is the format |
|
* supported by utilfdt_decode_type. |
|
*/ |
|
|
|
#define USAGE_TYPE_MSG \ |
|
"<type>\ts=string, i=int, u=unsigned, x=hex\n" \ |
|
"\tOptional modifier prefix:\n" \ |
|
"\t\thh or b=byte, h=2 byte, l=4 byte (default)"; |
|
|
|
/** |
|
* Print property data in a readable format to stdout |
|
* |
|
* Properties that look like strings will be printed as strings. Otherwise |
|
* the data will be displayed either as cells (if len is a multiple of 4 |
|
* bytes) or bytes. |
|
* |
|
* If len is 0 then this function does nothing. |
|
* |
|
* @param data Pointers to property data |
|
* @param len Length of property data |
|
*/ |
|
void utilfdt_print_data(const char *data, int len); |
|
|
|
/** |
|
* Show source version and exit |
|
*/ |
|
void util_version(void) __attribute__((noreturn)); |
|
|
|
/** |
|
* Show usage and exit |
|
* |
|
* This helps standardize the output of various utils. You most likely want |
|
* to use the usage() helper below rather than call this. |
|
* |
|
* @param errmsg If non-NULL, an error message to display |
|
* @param synopsis The initial example usage text (and possible examples) |
|
* @param short_opts The string of short options |
|
* @param long_opts The structure of long options |
|
* @param opts_help An array of help strings (should align with long_opts) |
|
*/ |
|
void util_usage(const char *errmsg, const char *synopsis, |
|
const char *short_opts, struct option const long_opts[], |
|
const char * const opts_help[]) __attribute__((noreturn)); |
|
|
|
/** |
|
* Show usage and exit |
|
* |
|
* If you name all your usage variables with usage_xxx, then you can call this |
|
* help macro rather than expanding all arguments yourself. |
|
* |
|
* @param errmsg If non-NULL, an error message to display |
|
*/ |
|
#define usage(errmsg) \ |
|
util_usage(errmsg, usage_synopsis, usage_short_opts, \ |
|
usage_long_opts, usage_opts_help) |
|
|
|
/** |
|
* Call getopt_long() with standard options |
|
* |
|
* Since all util code runs getopt in the same way, provide a helper. |
|
*/ |
|
#define util_getopt_long() getopt_long(argc, argv, usage_short_opts, \ |
|
usage_long_opts, NULL) |
|
|
|
/* Helper for aligning long_opts array */ |
|
#define a_argument required_argument |
|
|
|
/* Helper for usage_short_opts string constant */ |
|
#define USAGE_COMMON_SHORT_OPTS "hV" |
|
|
|
/* Helper for usage_long_opts option array */ |
|
#define USAGE_COMMON_LONG_OPTS \ |
|
{"help", no_argument, NULL, 'h'}, \ |
|
{"version", no_argument, NULL, 'V'}, \ |
|
{NULL, no_argument, NULL, 0x0} |
|
|
|
/* Helper for usage_opts_help array */ |
|
#define USAGE_COMMON_OPTS_HELP \ |
|
"Print this help and exit", \ |
|
"Print version and exit", \ |
|
NULL |
|
|
|
/* Helper for getopt case statements */ |
|
#define case_USAGE_COMMON_FLAGS \ |
|
case 'h': usage(NULL); \ |
|
case 'V': util_version(); \ |
|
case '?': usage("unknown option"); |
|
|
|
#endif /* _UTIL_H */
|
|
|