Example of doing normal printf with Jeff Robert's sprintf

stb_printf_test.cpp

#if 0 /* (sh-mode) 
set -e

LPATH=/Users/cro/Documents/PersonalProjects/Misc

tu_name=stb_printf_test

# -Ofast
[ ! ]&& time clang++ -g  --std=c++11 -fPIC -Wall \
  $LPATH/${tu_name}.cpp \
  -Wno-writable-strings \
  -Wno-unused-function \
  -Wno-deprecated-declarations \
  -I /Users/cro/Documents/shared \
  -o $LPATH/${tu_name}.bin

[ ! ]&&{
# ulimit -c unlimited
 $LPATH/${tu_name}.bin
}

true
exit # (c++-mode) 
*/
#endif
#include <unistd.h>
#include <assert.h>
#define STB_SPRINTF_IMPLEMENTATION
// #define STB_SPRINTF_MIN 16 // Just for testing
#include <stb/stb_sprintf.h>

#define stdout 1

char * __print_cb(char * buf, void * user_, int len ) {
    auto user = (char*)user_;
    auto r = write(stdout, buf, len);
    assert(r == len);
    return user;
}

void print(char const *fmt, ...) {
    va_list va;
    va_start( va, fmt );
    char buf[STB_SPRINTF_MIN];
    auto len = stbsp_vsprintfcb( __print_cb, buf, buf, fmt, va );
    assert (len >0);
    va_end(va);
    // auto r = write(stdout, buf, len - 1);
    // assert(r == len - 1);
    fsync(stdout);
}

int main() {
    print("zero\n");
    print("abcdefghijf1abcdefghijf2abcdefghijf3abcdefghijf4abcdefghijf5abcdefghijf6abcdefghijf7\n");
    print("Float: %0*.*f\n", 8, 3, 2.4);
    print("one\n");
    // char buf2[] = "ABCD\0ABCD\0ABCD";
    // auto r = write(stdout, buf2, sizeof(buf2)); 
    print("two\n");
    return 0;
}