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auto-str.c
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auto-str.c
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#include <ctype.h>
#include "substdio.h"
#include "readwrite.h"
#include "exit.h"
char buf1[256];
substdio ss1 = SUBSTDIO_FDBUF(write,1,buf1,sizeof(buf1));
static void putstr(const char *s)
{
if (substdio_puts(&ss1,s) == -1) _exit(111);
}
// check if a given character can be printed unquoted in a C string
// does not accept digits as they may be hardly visible between octal encoded chars
static int is_legible(unsigned char ch)
{
if (isascii(ch))
return 1;
if (ch == '/' || ch == '_' || ch == '-' || ch == '.')
return 1;
return 0;
}
int main(int argc, char **argv)
{
char *name;
char *value;
unsigned char ch;
char octal[4];
if (argc != 3) return 100;
name = argv[1];
if (!name) return 100;
value = argv[2];
if (!value) return 100;
putstr("char ");
putstr(name);
putstr("[] = \"\\\n");
while ((ch = *value++)) {
if (is_legible(ch)) {
if (substdio_put(&ss1, (char *)&ch, 1) == -1)
_exit(111);
} else {
putstr("\\");
octal[3] = 0;
octal[2] = '0' + (ch & 7); ch >>= 3;
octal[1] = '0' + (ch & 7); ch >>= 3;
octal[0] = '0' + (ch & 7);
putstr(octal);
}
}
putstr("\\\n\";\n");
if (substdio_flush(&ss1) == -1) return 111;
return 0;
}