With no base class for all fixed_string types, though, there's no way to pass fixed_string objects around, short of templating every function that uses them. A base class seems to be needed. Otherwise, there's no direct replacement for "char *" arguments. Here's a simple test program. It should be possible to do the common operations done here. That doesn't seem possible with the latest version in the Boost sandbox. John Nagle Animats ==== static void printstring(const char_string_base& str) { printf("Printing from a function: %s\n",str.c_str()); } static void editstring(char_string_base& str,float val) { sprintf(str,"F = %f\n",val); } int maindunn() { // String test char_string<80> s1; char_string<10> s2; s1.copy("This is a test"); printf("Hello: %s\n",s1.c_str()); sprintf(s1,"N=%d\n",100); s2.copy(s1); printf("Printing with printf directly: %s",s2.c_str()); editstring(s2,100); // This overflows the string. printstring(s2); } John Nagle Reece Dunn wrote:

John Nagle wrote:

...

That's an older version, though; the strings have no length field, and you said you were putting one in. Should I do that?

I have been busy with other things. I have finally gotten around to updating the code, which now includes: * internal length tracking * null-termination as a given (i.e. it will no longer work in data structure headers for signature checking, etc.) * safe_strings.hpp uses your strategy of putting the C-string functions in the global namespace (I would have liked a better approach to this).

#include <boost/fixed_string/safe_strings.hpp> // ... boost::char_string< 15 > cstr; strcpy( cstr, "Meine Grosse Welt!" ); std::cout << cstr << '\n';

sprintf( cstr, "Hello %d Worlds!", 10 ); std::cout << cstr << '\n';

Results in: Meine Grosse W Hello 10 World

Regards, Reece

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