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bin2c: Add option for alignment

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Sometimes it's useful if structures are aligned. This patch add a

  -A alignment

option. Note that this doesn't check for valid alignments. It accepts
any positive number in decimal or hex format. If for example an
alignment of 7 is specified, the compiler will complain that it is not a
power of 2. But it's not really useful to duplicate this check here.
This commit is contained in:
Christian Mauderer
2022-02-14 16:14:32 +01:00
parent 5c80f3023e
commit 3c0e4f74f1
1 changed files with 38 additions and 4 deletions
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42
misc/bin2c/rtems-bin2c.c
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@@ -42,6 +42,7 @@ int verbose = 0;
int zeroterminated = 0;
int createC = 1;
int createH = 1;
unsigned int align = 0;
static void sanitize_file_name(char *p)
{
@@ -175,11 +176,22 @@ void process(const char *ifname, const char *ofname, const char *forced_name)
/* print structure */
fprintf(
ocfile,
"%s%sunsigned char %s[] = {\n ",
"%s%sunsigned char %s[] ",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
buf
);
if (align > 0) {
fprintf(
ocfile,
"__attribute__(( __aligned__(%d) )) ",
align
);
}
fprintf(
ocfile,
"= {\n "
);
int c, col = 1;
while ((c = myfgetc(ifile)) != EOF) {
if (col >= 78 - 6) {
@@ -238,15 +250,22 @@ void process(const char *ifname, const char *ofname, const char *forced_name)
/* print structure */
fprintf(
ohfile,
"extern %s%sunsigned char %s[];",
"extern %s%sunsigned char %s[]",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
buf
);
if (align > 0) {
fprintf(
ohfile,
" __attribute__(( __aligned__(%d) ))",
align
);
};
/* print sizeof */
fprintf(
ohfile,
"\n"
";\n"
"extern %s%ssize_t %s_size;\n",
((usestatic) ? "static " : ""),
((useconst) ? "const " : ""),
@@ -274,7 +293,7 @@ void usage(void)
{
fprintf(
stderr,
"usage: bin2c [-csvzCH] [-N name] <input_file> <output_file>\n"
"usage: bin2c [-csvzCH] [-N name] [-A alignment] <input_file> <output_file>\n"
" <input_file> is the binary file to convert\n"
" <output_file> should not have a .c or .h extension\n"
"\n"
@@ -285,6 +304,7 @@ void usage(void)
" -H - create c-header only\n"
" -C - create c-source file only\n"
" -N - force name of data array\n"
" -A - add alignment - parameter can be a hexadecimal or decimal number\n"
);
exit(1);
}
@@ -329,6 +349,20 @@ int main(int argc, char **argv)
name = argv[1];
--argc;
++argv;
} else if (!strcmp(argv[1], "-A")) {
--argc;
++argv;
if (argc <= 1) {
fprintf(stderr, "error: -A needs an alignment\n");
usage();
}
align = strtoul(argv[1], NULL, 0);
if (align == 0) {
fprintf(stderr, "error: Couldn't convert argument of -A\n");
usage();
}
--argc;
++argv;
} else {
usage();
}