/** Allocate and print to string.
*
* @param strp Address of the pointer where to store the address of
* the newly allocated string.
* @fmt Format string.
*
* @return Number of characters printed or a negative error code.
*
*/
int asprintf(char **strp, const char *fmt, ...)
{
printf_spec_t ps = {
asprintf_str_write,
asprintf_wstr_write,
NULL
};
va_list args;
va_start(args, fmt);
int ret = printf_core(fmt, &ps, args);
va_end(args);
if (ret > 0) {
*strp = malloc(STR_BOUNDS(ret) + 1);
if (*strp == NULL)
return -1;
va_start(args, fmt);
vsnprintf(*strp, STR_BOUNDS(ret) + 1, fmt, args);
va_end(args);
}
return ret;
}
int vdprintf(int fd, const char *format, va_list ap) {
struct _fd_printer fp;
fp.fd = fd;
fp.err = 0;
fp.count = 0;
printf_core(fd_printer, &fp, format, ap);
return fp.count;
}
/** Print formatted text to kio.
*
* @param fmt Format string
* @param ap Format parameters
*
* \see For more details about format string see printf_core.
*
*/
int kio_vprintf(const char *fmt, va_list ap)
{
printf_spec_t ps = {
kio_vprintf_str_write,
kio_vprintf_wstr_write,
NULL
};
return printf_core(fmt, &ps, ap);
}
/** Append a message to the currently being written entry.
*
* Requires that an entry has been started using log_begin()
*/
int log_vprintf(const char *fmt, va_list args)
{
int ret;
printf_spec_t ps = {
log_printf_str_write,
log_printf_wstr_write,
NULL
};
ret = printf_core(fmt, &ps, args);
return ret;
}
int
vsnprintf(char *s, size_t num, const char *format, va_list args)
{
struct string_printer_ctx ctx = { s, num };
return printf_core(format, string_printer, &ctx, args);
}
int
vfprintf(FILE *stream, const char *format, va_list args)
{
return printf_core(format, file_printer, stream, args);
}
