util-lib: split out printf() helpers to stdio-util.h

2015-10-27 13:25:57 +01:00
parent c7f1808add
commit 15a5e95075
28 changed files with 114 additions and 57 deletions
@@ -0,0 +1,78 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#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)