util/cbfstool/common.h

/*
 * Copyright (C) 2009 coresystems GmbH
 *                 written by Patrick Georgi <patrick.georgi@coresystems.de>
 * Copyright (C) 2012 Google, 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; version 2 of the License.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
 */

#ifndef __CBFSTOOL_COMMON_H
#define __CBFSTOOL_COMMON_H

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>

/* Endianess */
#include "swab.h"
#ifndef __APPLE__
#define ntohl(x)	(is_big_endian() ? (uint32_t)(x) : swab32(x))
#define htonl(x)	(is_big_endian() ? (uint32_t)(x) : swab32(x))
#endif
#define ntohll(x)	(is_big_endian() ? (uint64_t)(x) : swab64(x))
#define htonll(x)	(is_big_endian() ? (uint64_t)(x) : swab64(x))
int is_big_endian(void);

/* Message output */
extern int verbose;
#define ERROR(...) { fprintf(stderr, "E: " __VA_ARGS__); }
#define WARN(...) { fprintf(stderr, "W: " __VA_ARGS__); }
#define LOG(...) { fprintf(stderr, __VA_ARGS__); }
#define INFO(...) { if (verbose > 0) fprintf(stderr, "INFO: " __VA_ARGS__); }
#define DEBUG(...) { if (verbose > 1) fprintf(stderr, "DEBUG: " __VA_ARGS__); }

/* Helpers */
#define ARRAY_SIZE(a) (int)(sizeof(a) / sizeof((a)[0]))
#define ALIGN(val, by) (((val) + (by)-1)&~((by)-1))
#define MAX(x, y) ((x) > (y) ? (x) : (y))
#define MIN(x, y) ((x) < (y) ? (x) : (y))

#define unused __attribute__((unused))

static inline uint32_t align_up(uint32_t value, uint32_t align)
{
	if (value % align)
		value += align - (value % align);
	return value;
}

/* Buffer and file I/O */
struct buffer {
	char *name;
	char *data;
	size_t offset;
	size_t size;
};

static inline void *buffer_get(const struct buffer *b)
{
	return b->data;
}

static inline size_t buffer_size(const struct buffer *b)
{
	return b->size;
}

/*
 * Shrink a buffer toward the beginning of its previous space.
 * Afterward, buffer_delete() remains the means of cleaning it up. */
static inline void buffer_set_size(struct buffer *b, size_t size)
{
	b->size = size;
}

/* Initialize a buffer with the given constraints. */
static inline void buffer_init(struct buffer *b, char *name, void *data,
                               size_t size)
{
	b->name = name;
	b->data = data;
	b->size = size;
}

/* Splice a buffer into another buffer. Note that it's up to the caller to
 * bounds check the offset and size. The resulting buffer is backed by the same
 * storage as the original, so although it is valid to buffer_delete() either
 * one of them, doing so releases both simultaneously. */
static inline void buffer_splice(struct buffer *dest, const struct buffer *src,
                                 size_t offset, size_t size)
{
	dest->name = src->name;
	dest->data = src->data + offset;
	dest->offset = src->offset + offset;
	dest->size = size;
}

/*
 * Shallow copy a buffer. To clean up the resources, buffer_delete()
 * either one, but not both. */
static inline void buffer_clone(struct buffer *dest, const struct buffer *src)
{
	buffer_splice(dest, src, 0, src->size);
}

/*
 * Shrink a buffer toward the end of its previous space.
 * Afterward, buffer_delete() remains the means of cleaning it up. */
static inline void buffer_seek(struct buffer *b, size_t size)
{
	b->offset += size;
	b->size -= size;
	b->data += size;
}

/* Returns whether the buffer begins with the specified magic bytes. */
static inline bool buffer_check_magic(const struct buffer *b, const char *magic,
							size_t magic_len)
{
	assert(magic);
	return b && b->size >= magic_len &&
					memcmp(b->data, magic, magic_len) == 0;
}

/* Creates an empty memory buffer with given size.
 * Returns 0 on success, otherwise non-zero. */
int buffer_create(struct buffer *buffer, size_t size, const char *name);

/* Loads a file into memory buffer. Returns 0 on success, otherwise non-zero. */
int buffer_from_file(struct buffer *buffer, const char *filename);

/* Writes memory buffer content into file.
 * Returns 0 on success, otherwise non-zero. */
int buffer_write_file(struct buffer *buffer, const char *filename);

/* Destroys a memory buffer. */
void buffer_delete(struct buffer *buffer);

const char *arch_to_string(uint32_t a);
uint32_t string_to_arch(const char *arch_string);

typedef int (*comp_func_ptr) (char *, int, char *, int *);
typedef enum { CBFS_COMPRESS_NONE = 0, CBFS_COMPRESS_LZMA = 1 } comp_algo;

comp_func_ptr compression_function(comp_algo algo);

uint64_t intfiletype(const char *name);

/* cbfs-mkpayload.c */
int parse_elf_to_payload(const struct buffer *input, struct buffer *output,
			 comp_algo algo);
int parse_fv_to_payload(const struct buffer *input,
			 struct buffer *output, comp_algo algo);
int parse_bzImage_to_payload(const struct buffer *input,
			     struct buffer *output, const char *initrd,
			     char *cmdline, comp_algo algo);
int parse_flat_binary_to_payload(const struct buffer *input,
				 struct buffer *output,
				 uint32_t loadaddress,
				 uint32_t entrypoint,
				 comp_algo algo);
/* cbfs-mkstage.c */
int parse_elf_to_stage(const struct buffer *input, struct buffer *output,
		       comp_algo algo, uint32_t *location,
		       const char *ignore_section);

void print_supported_filetypes(void);

/* lzma/lzma.c */
int do_lzma_compress(char *in, int in_len, char *out, int *out_len);
int do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len);

/* xdr.c */
struct xdr {
	uint8_t (*get8)(struct buffer *input);
	uint16_t (*get16)(struct buffer *input);
	uint32_t (*get32)(struct buffer *input);
	uint64_t (*get64)(struct buffer *input);
	void (*put8)(struct buffer *input, uint8_t val);
	void (*put16)(struct buffer *input, uint16_t val);
	void (*put32)(struct buffer *input, uint32_t val);
	void (*put64)(struct buffer *input, uint64_t val);
};

extern struct xdr xdr_le, xdr_be;
size_t bgets(struct buffer *input, void *output, size_t len);
size_t bputs(struct buffer *b, const void *data, size_t len);

#endif