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/*
* This C program takes a filename and an array name, and prints to
* stdout an array of the data contained in the file.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
int main(int argc, char *argv[])
{
char *arrayname, *filename;
unsigned char *src;
struct stat stat_buf;
int length, fd, i, n;
if (argc != 3) {
fprintf(stderr, "usage: %s [filename] [arrayname]\n", argv[0]);
return 1;
}
filename = argv[1];
arrayname = argv[2];
/* open the file */
fd = open(filename, O_RDONLY);
if (fd < 0) {
fprintf(stderr, "unable to open(2) %s (%s)\n",
filename, strerror(errno));
return 1;
}
/* get the length of the file */
if (fstat(fd, &stat_buf) != 0) {
fprintf(stderr, "unable to stat(2) %s (%s)\n",
filename, strerror(errno));
return 1;
}
length = stat_buf.st_size;
/* map the file */
src = mmap(0, length, PROT_READ, MAP_SHARED, fd, 0);
if (src == (void *) -1) {
fprintf(stderr, "unable to mmap(2) %s (%s)\n",
filename, strerror(errno));
return 1;
}
/* print the header */
printf("/*\n");
printf( " * THIS FILE IS AUTOMATICALLY GENERATED - DO NOT EDIT\n");
printf( " *\n");
printf( " * This file contains the contents of the file \"%s\"\n",
filename);
printf( " * as the byte array %s[].\n", arrayname);
printf( " */\n\n");
/* print a separate variable that stores the size */
printf("const int %s_size = %d;\n\n", arrayname, length);
/* print the array name */
printf("const unsigned char %s[%d] = {\n", arrayname, length);
for (i = 0, n = 0; i < length; i++, n++) {
if (n == 0) printf(" ");
printf("0x%02x, ", src[i]);
if (n >= 11) { printf("\n"); n = -1; }
}
printf("\n};\n\n");
/* unmap the file */
munmap(src, length);
/* close the file */
close(fd);
return 0;
}
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