62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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/*
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Copyright (C) 1995 Free Software Foundation
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This file is part of the GNU IO Library. This library is free
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software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option)
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any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does not cause
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the resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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#include <malloc.h>
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#include "libioP.h"
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#include "stdio.h"
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#include "strfile.h"
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int
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_IO_vasprintf (result_ptr, format, args)
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char **result_ptr;
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const char *format;
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_IO_va_list args;
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{
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/* Initial size of the buffer to be used. Will be doubled each time an
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overflow occurs. */
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const _IO_size_t init_string_size = 100;
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char *string;
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_IO_strfile sf;
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int ret;
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string = ALLOC_BUF(init_string_size);
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if (string == NULL)
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return -1;
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_IO_init((_IO_FILE*)&sf, 0);
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_IO_JUMPS((_IO_FILE*)&sf) = &_IO_str_jumps;
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_IO_str_init_static ((_IO_FILE*)&sf, string, init_string_size, string);
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sf._f._flags &= ~_IO_USER_BUF;
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sf._s._allocate_buffer = (_IO_alloc_type)malloc;
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sf._s._free_buffer = (_IO_free_type)free;
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ret = _IO_vfprintf((_IO_FILE*)&sf, format, args);
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if (ret < 0)
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return ret;
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*result_ptr = (char*)realloc(sf._f._IO_buf_base,
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(sf._f._IO_write_ptr - sf._f._IO_write_base) +1);
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if (*result_ptr == NULL)
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*result_ptr = sf._f._IO_buf_base;
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(*result_ptr)[sf._f._IO_write_ptr-sf._f._IO_write_base] = '\0';
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return ret;
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}
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weak_alias (_IO_vasprintf, vasprintf)
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