| // Copyright 2016 The Fuchsia Authors |
| // Copyright (c) 2008 Travis Geiselbrecht |
| // |
| // Use of this source code is governed by a MIT-style |
| // license that can be found in the LICENSE file or at |
| // https://opensource.org/licenses/MIT |
| |
| #pragma once |
| |
| #include <stdarg.h> |
| #include <zircon/compiler.h> |
| #include <stddef.h> |
| |
| __BEGIN_CDECLS |
| |
| /* printf engine that parses the format string and generates output */ |
| |
| /* function pointer to pass the printf engine, called back during the formatting. |
| * input is a string to output, length bytes to output, |
| * return code is number of characters that would have been written, or error code (if negative) |
| */ |
| typedef int (*_printf_engine_output_func)(const char *str, size_t len, void *state); |
| |
| #ifndef PRINTF_DECL |
| #define PRINTF_DECL(name) int name |
| #endif |
| #ifndef PRINTF_CALL |
| #define PRINTF_CALL(name) name |
| #endif |
| |
| PRINTF_DECL(_printf_engine)(_printf_engine_output_func out, void *state, const char *fmt, va_list ap); |
| |
| __END_CDECLS |
