1/* Print output of stream to given obstack. 2 Copyright (C) 1996, 1997 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Library General Public License as 8 published by the Free Software Foundation; either version 2 of the 9 License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Library General Public License for more details. 15 16 You should have received a copy of the GNU Library General Public 17 License along with the GNU C Library; see the file COPYING.LIB. If not, 18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. */ 20 21 22#ifdef __STDC__ 23#include <stdlib.h> 24#endif 25#include "libioP.h" 26#include <string.h> 27#include <errno.h> 28#include <obstack.h> 29#include <stdarg.h> 30 31 32struct _IO_obstack_file 33{ 34 struct _IO_FILE file; 35 const void *vtable; 36 struct obstack *obstack; 37}; 38 39 40static int 41_IO_obstack_overflow (_IO_FILE *fp, int c) 42{ 43 struct obstack *obstack = ((struct _IO_obstack_file *) fp)->obstack; 44 45 /* Make room for another character. This might as well allocate a 46 new chunk a memory and moves the old contents over. */ 47 if (c != EOF) 48 obstack_1grow (obstack, c); 49 50 /* Setup the buffer pointers again. */ 51 fp->_IO_write_base = obstack_base (obstack); 52 fp->_IO_write_ptr = obstack_next_free (obstack); 53 fp->_IO_write_end = fp->_IO_write_base + obstack_room (obstack); 54 /* Now allocate the rest of the current chunk. */ 55 obstack_blank_fast (obstack, fp->_IO_write_end - fp->_IO_write_ptr); 56 57 return c; 58} 59 60 61static _IO_size_t 62_IO_obstack_xsputn (_IO_FILE *fp, const void *data, _IO_size_t n) 63{ 64 struct obstack *obstack = ((struct _IO_obstack_file *) fp)->obstack; 65 66 if (fp->_IO_write_ptr + n > fp->_IO_write_end) 67 { 68 /* We need some more memory. First shrink the buffer to the 69 space we really currently need. */ 70 obstack_blank (obstack, fp->_IO_write_ptr - fp->_IO_write_end); 71 72 /* Now grow for N bytes. */ 73 obstack_blank (obstack, n); 74 75 /* Setup the buffer pointers again. */ 76 fp->_IO_write_base = obstack_base (obstack); 77 fp->_IO_write_ptr = obstack_next_free (obstack); 78 fp->_IO_write_end = (fp->_IO_write_base + obstack_room (obstack)); 79 /* Now allocate the rest of the current chunk. */ 80 obstack_blank_fast (obstack, fp->_IO_write_end - fp->_IO_write_ptr); 81 } 82 else 83 { 84 memcpy (fp->_IO_write_ptr, data, n); 85 fp->_IO_write_ptr += n; 86 } 87 88 return n; 89} 90 91 92/* the jump table. */ 93static struct _IO_jump_t _IO_obstack_jumps = 94{ 95 JUMP_INIT_DUMMY, 96 JUMP_INIT(finish, NULL), 97 JUMP_INIT(overflow, _IO_obstack_overflow), 98 JUMP_INIT(underflow, NULL), 99 JUMP_INIT(uflow, NULL), 100 JUMP_INIT(pbackfail, NULL), 101 JUMP_INIT(xsputn, _IO_obstack_xsputn), 102 JUMP_INIT(xsgetn, NULL), 103 JUMP_INIT(seekoff, NULL), 104 JUMP_INIT(seekpos, NULL), 105 JUMP_INIT(setbuf, NULL), 106 JUMP_INIT(sync, NULL), 107 JUMP_INIT(doallocate, NULL), 108 JUMP_INIT(read, NULL), 109 JUMP_INIT(write, NULL), 110 JUMP_INIT(seek, NULL), 111 JUMP_INIT(close, NULL), 112 JUMP_INIT(stat, NULL) 113}; 114 115 116int 117_IO_obstack_vprintf (struct obstack *obstack, const char *format, va_list args) 118{ 119 struct obstack_FILE 120 { 121 struct _IO_obstack_file ofile; 122#ifdef _IO_MTSAFE_IO 123 _IO_lock_t lock; 124#endif 125 } new_f; 126 int result; 127 128#ifdef _IO_MTSAFE_IO 129 new_f.ofile.file._lock = &new_f.lock; 130#endif 131 132 _IO_init ((_IO_FILE *) &new_f.ofile, 0); 133 _IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps; 134 _IO_str_init_static (&new_f.ofile.file, obstack_base (obstack), 135 (obstack_object_size (obstack) + 136 obstack_room (obstack)), obstack_next_free (obstack)); 137 /* Now allocate the rest of the current chunk. */ 138 obstack_blank_fast (obstack, 139 (new_f.ofile.file._IO_write_end 140 - new_f.ofile.file._IO_write_ptr)); 141 new_f.ofile.obstack = obstack; 142 143 result = _IO_vfprintf ((_IO_FILE *) &new_f, format, args); 144 145 /* Shrink the buffer to the space we really currently need. */ 146 obstack_blank (obstack, (new_f.ofile.file._IO_write_ptr 147 - new_f.ofile.file._IO_write_end)); 148 149 return result; 150} 151#ifdef weak_alias 152weak_alias (_IO_obstack_vprintf, obstack_vprintf) 153#endif 154 155 156int 157_IO_obstack_printf (struct obstack *obstack, const char *format, ...) 158{ 159 int result; 160 va_list ap; 161 va_start (ap, format); 162 result = _IO_obstack_vprintf (obstack, format, ap); 163 va_end (ap); 164 return result; 165} 166#ifdef weak_alias 167weak_alias (_IO_obstack_printf, obstack_printf) 168#endif 169