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Diffstat (limited to 'src/libbasic/stdio-util.h')
| -rw-r--r-- | src/libbasic/stdio-util.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/libbasic/stdio-util.h b/src/libbasic/stdio-util.h new file mode 100644 index 0000000000..bd1144b4c9 --- /dev/null +++ b/src/libbasic/stdio-util.h @@ -0,0 +1,76 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <printf.h> +#include <stdarg.h> +#include <stdio.h> +#include <sys/types.h> + +#include "macro.h" + +#define xsprintf(buf, fmt, ...) \ + assert_message_se((size_t) snprintf(buf, ELEMENTSOF(buf), fmt, __VA_ARGS__) < ELEMENTSOF(buf), "xsprintf: " #buf "[] must be big enough") + + +#define VA_FORMAT_ADVANCE(format, ap) \ +do { \ + int _argtypes[128]; \ + size_t _i, _k; \ + _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \ + assert(_k < ELEMENTSOF(_argtypes)); \ + for (_i = 0; _i < _k; _i++) { \ + if (_argtypes[_i] & PA_FLAG_PTR) { \ + (void) va_arg(ap, void*); \ + continue; \ + } \ + \ + switch (_argtypes[_i]) { \ + case PA_INT: \ + case PA_INT|PA_FLAG_SHORT: \ + case PA_CHAR: \ + (void) va_arg(ap, int); \ + break; \ + case PA_INT|PA_FLAG_LONG: \ + (void) va_arg(ap, long int); \ + break; \ + case PA_INT|PA_FLAG_LONG_LONG: \ + (void) va_arg(ap, long long int); \ + break; \ + case PA_WCHAR: \ + (void) va_arg(ap, wchar_t); \ + break; \ + case PA_WSTRING: \ + case PA_STRING: \ + case PA_POINTER: \ + (void) va_arg(ap, void*); \ + break; \ + case PA_FLOAT: \ + case PA_DOUBLE: \ + (void) va_arg(ap, double); \ + break; \ + case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \ + (void) va_arg(ap, long double); \ + break; \ + default: \ + assert_not_reached("Unknown format string argument."); \ + } \ + } \ +} while (false) |