// SPDX-License-Identifier: GPL-2.0+
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/*
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* Convert a file image to a C define
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*
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* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
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*
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* For testing EFI disk management we need an in memory image of
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* a disk.
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*
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* The tool file2include converts a file to a C include. The file
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* is separated into strings of 8 bytes. Only the non-zero strings
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* are written to the include. The output format has been designed
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* to maintain readability.
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*
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* As the disk image needed for testing contains mostly zeroes a high
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* compression ratio can be attained.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <malloc.h>
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/* Size of the blocks written to the compressed file */
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#define BLOCK_SIZE 8
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int main(int argc, char *argv[])
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{
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FILE *file;
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int ret;
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unsigned char *buf;
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size_t count, i, j;
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/* Provide usage help */
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if (argc != 2) {
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printf("Usage:\n%s FILENAME\n", argv[0]);
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return EXIT_FAILURE;
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}
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/* Open file */
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file = fopen(argv[1], "r");
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if (!file) {
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perror("fopen");
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return EXIT_FAILURE;
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}
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/* Get file length */
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ret = fseek(file, 0, SEEK_END);
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if (ret < 0) {
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perror("fseek");
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return EXIT_FAILURE;
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}
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count = ftell(file);
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if (!count) {
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fprintf(stderr, "File %s has length 0\n", argv[1]);
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return EXIT_FAILURE;
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}
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rewind(file);
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/* Read file */
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buf = malloc(count);
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if (!buf) {
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perror("calloc");
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return EXIT_FAILURE;
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}
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count = fread(buf, 1, count, file);
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/* Generate output */
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printf("/* SPDX-License-Identifier: GPL-2.0+ */\n");
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printf("/*\n");
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printf(" * Non-zero %u byte strings of a disk image\n", BLOCK_SIZE);
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printf(" *\n");
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printf(" * Generated with tools/file2include\n");
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printf(" */\n\n");
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printf("#define EFI_ST_DISK_IMG { 0x%08zx, { \\\n", count);
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for (i = 0; i < count; i += BLOCK_SIZE) {
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int c = 0;
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for (j = i; j < i + BLOCK_SIZE && j < count; ++j) {
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if (buf[j])
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c = 1;
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}
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if (!c)
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continue;
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printf("\t{0x%08zx, \"", i);
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for (j = i; j < i + BLOCK_SIZE && j < count; ++j)
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printf("\\x%02x", buf[j]);
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printf("\"}, /* ");
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for (j = i; j < i + BLOCK_SIZE && j < count; ++j) {
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if (buf[j] != '*' && buf[j] >= 0x20 && buf[j] <= 0x7e)
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printf("%c", buf[j]);
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else
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printf(".");
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}
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printf(" */ \\\n");
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}
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printf("\t{0, NULL} } }\n");
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/* Release resources */
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free(buf);
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ret = fclose(file);
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if (ret) {
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perror("fclose");
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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