01df97080e
This creates more object files in the static library which reduces the size of statically linked files as only the relevant object files are included. In my experience, it reduced the size of the system initrd from 1.9 MiB to 1.6 MiB which is valuable.
128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
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This file is part of LibMaxsi.
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LibMaxsi is free software: you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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details.
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You should have received a copy of the GNU Lesser General Public License
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along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
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print.cpp
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Provides the stubs for the printf family of functions.
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*******************************************************************************/
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#include <libmaxsi/platform.h>
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#include <libmaxsi/format.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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namespace Maxsi {
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static size_t FileWriteCallback(void* user, const char* string, size_t stringlen)
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{
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FILE* fp = (FILE*) user;
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return fwrite(string, 1, stringlen, fp);
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}
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extern "C" int vfprintf(FILE* fp, const char* /*restrict*/ format, va_list list)
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{
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size_t result = Maxsi::Format::Virtual(FileWriteCallback, fp, format, list);
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return (int) result;
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}
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extern "C" int fprintf(FILE* fp, const char* /*restrict*/ format, ...)
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{
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va_list list;
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va_start(list, format);
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size_t result = vfprintf(fp, format, list);
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va_end(list);
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return (int) result;
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}
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extern "C" int vprintf(const char* /*restrict*/ format, va_list list)
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{
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size_t result = vfprintf(stdout, format, list);
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return (int) result;
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}
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extern "C" int printf(const char* /*restrict*/ format, ...)
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{
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va_list list;
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va_start(list, format);
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size_t result = vprintf(format, list);
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va_end(list);
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return (int) result;
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}
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typedef struct vsnprintf_struct
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{
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char* str;
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size_t size;
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size_t produced;
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size_t written;
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} vsnprintf_t;
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static size_t StringPrintCallback(void* user, const char* string, size_t stringlen)
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{
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vsnprintf_t* info = (vsnprintf_t*) user;
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if ( info->produced < info->size )
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{
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size_t available = info->size - info->produced;
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size_t possible = (stringlen < available) ? stringlen : available;
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memcpy(info->str + info->produced, string, possible);
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info->written += possible;
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}
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info->produced += stringlen;
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return stringlen;
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}
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extern "C" int vsnprintf(char* restrict str, size_t size, const char* restrict format, va_list list)
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{
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vsnprintf_t info;
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info.str = str;
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info.size = (size) ? size-1 : 0;
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info.produced = 0;
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info.written = 0;
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Maxsi::Format::Virtual(StringPrintCallback, &info, format, list);
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if ( size ) { info.str[info.written] = '\0'; }
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return (int) info.produced;
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}
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extern "C" int snprintf(char* restrict str, size_t size, const char* restrict format, ...)
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{
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va_list list;
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va_start(list, format);
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int result = vsnprintf(str, size, format, list);
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va_end(list);
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return result;
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}
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extern "C" int vsprintf(char* restrict str, const char* restrict format, va_list list)
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{
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return vsnprintf(str, SIZE_MAX, format, list);
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}
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extern "C" int sprintf(char* restrict str, const char* restrict format, ...)
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{
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va_list list;
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va_start(list, format);
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int result = vsprintf(str, format, list);
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va_end(list);
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return result;
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}
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} // namespace Maxsi
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