243 lines
6.9 KiB
C
243 lines
6.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
#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.
|
|
*/
|
|
|
|
#ifdef __GNUC__
|
|
#define PRINTF(i, j) __attribute__((format (printf, i, j)))
|
|
#define NORETURN __attribute__((noreturn))
|
|
#else
|
|
#define PRINTF(i, j)
|
|
#define NORETURN
|
|
#endif
|
|
|
|
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
|
|
|
#define stringify(s) stringify_(s)
|
|
#define stringify_(s) #s
|
|
|
|
static inline void NORETURN PRINTF(1, 2) die(const char *str, ...)
|
|
{
|
|
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);
|
|
|
|
extern int PRINTF(2, 3) xasprintf(char **strp, const char *fmt, ...);
|
|
extern int PRINTF(2, 3) xasprintf_append(char **strp, const char *fmt, ...);
|
|
extern int xavsprintf_append(char **strp, const char *fmt, va_list ap);
|
|
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
|
|
* @param len If non-NULL, the amount of data we managed to read
|
|
* @return Pointer to allocated buffer containing fdt, or NULL on error
|
|
*/
|
|
char *utilfdt_read(const char *filename, size_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
|
|
* @param len If non-NULL, the amount of data we managed to read
|
|
* @return 0 if ok, else an errno value representing the error
|
|
*/
|
|
int utilfdt_read_err(const char *filename, char **buffp, size_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 Pointer 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 Pointer 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 NORETURN util_version(void);
|
|
|
|
/**
|
|
* 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 NORETURN util_usage(const char *errmsg, const char *synopsis,
|
|
const char *short_opts,
|
|
struct option const long_opts[],
|
|
const char * const opts_help[]);
|
|
|
|
/**
|
|
* 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 */
|