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-rw-r--r--libio/vasprintf.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/libio/vasprintf.c b/libio/vasprintf.c
new file mode 100644
index 0000000000..ee92f83b1c
--- /dev/null
+++ b/libio/vasprintf.c
@@ -0,0 +1,61 @@
+/*
+Copyright (C) 1995 Free Software Foundation
+
+This file is part of the GNU IO Library. This library is free
+software; you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This library 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+As a special exception, if you link this library with files
+compiled with a GNU compiler to produce an executable, this does not cause
+the resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why
+the executable file might be covered by the GNU General Public License. */
+
+#include <malloc.h>
+#include "libioP.h"
+#include "stdio.h"
+#include "strfile.h"
+
+int
+_IO_vasprintf (result_ptr, format, args)
+ char **result_ptr;
+ const char *format;
+ _IO_va_list args;
+{
+ /* Initial size of the buffer to be used. Will be doubled each time an
+ overflow occurs. */
+ const _IO_size_t init_string_size = 100;
+ char *string;
+ _IO_strfile sf;
+ int ret;
+ string = ALLOC_BUF(init_string_size);
+ if (string == NULL)
+ return -1;
+ _IO_init((_IO_FILE*)&sf, 0);
+ _IO_JUMPS((_IO_FILE*)&sf) = &_IO_str_jumps;
+ _IO_str_init_static ((_IO_FILE*)&sf, string, init_string_size, string);
+ sf._f._flags &= ~_IO_USER_BUF;
+ sf._s._allocate_buffer = (_IO_alloc_type)malloc;
+ sf._s._free_buffer = (_IO_free_type)free;
+ ret = _IO_vfprintf((_IO_FILE*)&sf, format, args);
+ if (ret < 0)
+ return ret;
+ *result_ptr = (char*)realloc(sf._f._IO_buf_base,
+ (sf._f._IO_write_ptr - sf._f._IO_write_base) +1);
+ if (*result_ptr == NULL)
+ *result_ptr = sf._f._IO_buf_base;
+ (*result_ptr)[sf._f._IO_write_ptr-sf._f._IO_write_base] = '\0';
+ return ret;
+}
+weak_alias (_IO_vasprintf, vasprintf)