df3c6b13ab
Updates the minimal libc headers for differences between the C and C++
languages. This includes ...
1. Conditionally defining "bool", "true" and "false" as they are
already keywords in C++.
2. Making the definition of NULL language dependent.
3. Using the _Restrict macro instead of the restrict keyword as
restrict exists in C, but not in C++.
4. Changing the definition of size_t so that it is compatible with
what the compiler expects when building the new operator stubs
(as it varies by architecture).
Change-Id: I37ff058a60b90a05f96e9dd6f61d454d143041ce
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
121 lines
2.5 KiB
C
121 lines
2.5 KiB
C
/* sprintf.c */
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/*
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* Copyright (c) 1997-2010, 2013-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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extern int _prf(int (*func)(), void *dest,
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const char *format, va_list vargs);
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struct emitter {
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char *ptr;
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int len;
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};
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static int sprintf_out(int c, struct emitter *p)
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{
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if (p->len > 1) { /* need to reserve a byte for EOS */
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*(p->ptr) = c;
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p->ptr += 1;
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p->len -= 1;
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}
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return 0; /* indicate keep going so we get the total count */
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}
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int snprintf(char *_Restrict s, size_t len, const char *_Restrict format, ...)
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{
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va_list vargs;
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struct emitter p;
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int r;
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char dummy;
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if ((int) len <= 0) {
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if (len == 0) {
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s = &dummy; /* write final NUL to dummy, since can't change *s */
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} else {
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len = 0x7fffffff; /* allow up to "maxint" characters */
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}
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}
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p.ptr = s;
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p.len = (int) len;
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va_start(vargs, format);
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r = _prf(sprintf_out, (void *) (&p), format, vargs);
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va_end(vargs);
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*(p.ptr) = 0;
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return r;
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}
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int sprintf(char *_Restrict s, const char *_Restrict format, ...)
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{
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va_list vargs;
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struct emitter p;
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int r;
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p.ptr = s;
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p.len = (int) 0x7fffffff; /* allow up to "maxint" characters */
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va_start(vargs, format);
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r = _prf(sprintf_out, (void *) (&p), format, vargs);
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va_end(vargs);
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*(p.ptr) = 0;
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return r;
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}
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int vsnprintf(char *_Restrict s, size_t len, const char *_Restrict format, va_list vargs)
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{
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struct emitter p;
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int r;
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char dummy;
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if ((int) len <= 0) {
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if (len == 0) {
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s = &dummy; /* write final NUL to dummy, since can't change *s */
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} else {
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len = 0x7fffffff; /* allow up to "maxint" characters */
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}
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}
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p.ptr = s;
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p.len = (int) len;
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r = _prf(sprintf_out, (void *) (&p), format, vargs);
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*(p.ptr) = 0;
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return r;
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}
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int vsprintf(char *_Restrict s, const char *_Restrict format, va_list vargs)
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{
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struct emitter p;
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int r;
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p.ptr = s;
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p.len = (int) 0x7fffffff; /* allow up to "maxint" characters */
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r = _prf(sprintf_out, (void *) (&p), format, vargs);
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*(p.ptr) = 0;
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return r;
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}
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