1 /* UI_FILE - a generic STDIO like output stream. 2 Copyright (C) 1999-2016 Free Software Foundation, Inc. 3 4 This file is part of GDB. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program 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 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 18 19 #ifndef UI_FILE_H 20 #define UI_FILE_H 21 22 struct obstack; 23 struct ui_file; 24 25 /* Create a generic ui_file object with null methods. */ 26 27 extern struct ui_file *ui_file_new (void); 28 29 /* Override methods used by specific implementations of a UI_FILE 30 object. */ 31 32 typedef void (ui_file_flush_ftype) (struct ui_file *stream); 33 extern void set_ui_file_flush (struct ui_file *stream, 34 ui_file_flush_ftype *flush); 35 36 /* NOTE: Both fputs and write methods are available. Default 37 implementations that mapping one onto the other are included. */ 38 typedef void (ui_file_write_ftype) (struct ui_file *stream, 39 const char *buf, long length_buf); 40 extern void set_ui_file_write (struct ui_file *stream, 41 ui_file_write_ftype *fputs); 42 43 typedef void (ui_file_fputs_ftype) (const char *, struct ui_file *stream); 44 extern void set_ui_file_fputs (struct ui_file *stream, 45 ui_file_fputs_ftype *fputs); 46 47 /* This version of "write" is safe for use in signal handlers. 48 It's not guaranteed that all existing output will have been 49 flushed first. 50 Implementations are also free to ignore some or all of the request. 51 fputs_async is not provided as the async versions are rarely used, 52 no point in having both for a rarely used interface. */ 53 typedef void (ui_file_write_async_safe_ftype) 54 (struct ui_file *stream, const char *buf, long length_buf); 55 extern void set_ui_file_write_async_safe 56 (struct ui_file *stream, ui_file_write_async_safe_ftype *write_async_safe); 57 58 typedef long (ui_file_read_ftype) (struct ui_file *stream, 59 char *buf, long length_buf); 60 extern void set_ui_file_read (struct ui_file *stream, 61 ui_file_read_ftype *fread); 62 63 typedef int (ui_file_isatty_ftype) (struct ui_file *stream); 64 extern void set_ui_file_isatty (struct ui_file *stream, 65 ui_file_isatty_ftype *isatty); 66 67 typedef void (ui_file_rewind_ftype) (struct ui_file *stream); 68 extern void set_ui_file_rewind (struct ui_file *stream, 69 ui_file_rewind_ftype *rewind); 70 71 typedef void (ui_file_put_method_ftype) (void *object, const char *buffer, 72 long length_buffer); 73 typedef void (ui_file_put_ftype) (struct ui_file *stream, 74 ui_file_put_method_ftype *method, 75 void *context); 76 extern void set_ui_file_put (struct ui_file *stream, ui_file_put_ftype *put); 77 78 typedef void (ui_file_delete_ftype) (struct ui_file * stream); 79 extern void set_ui_file_data (struct ui_file *stream, void *data, 80 ui_file_delete_ftype *to_delete); 81 82 typedef int (ui_file_fseek_ftype) (struct ui_file *stream, long offset, 83 int whence); 84 extern void set_ui_file_fseek (struct ui_file *stream, 85 ui_file_fseek_ftype *fseek_ptr); 86 87 extern void *ui_file_data (struct ui_file *file); 88 89 90 extern void gdb_flush (struct ui_file *); 91 92 extern void ui_file_delete (struct ui_file *stream); 93 94 extern void ui_file_rewind (struct ui_file *stream); 95 96 extern int ui_file_isatty (struct ui_file *); 97 98 extern void ui_file_write (struct ui_file *file, const char *buf, 99 long length_buf); 100 101 /* A wrapper for ui_file_write that is suitable for use by 102 ui_file_put. */ 103 104 extern void ui_file_write_for_put (void *data, const char *buffer, 105 long length_buffer); 106 107 extern void ui_file_write_async_safe (struct ui_file *file, const char *buf, 108 long length_buf); 109 110 /* NOTE: copies left to right. */ 111 extern void ui_file_put (struct ui_file *src, 112 ui_file_put_method_ftype *write, void *dest); 113 114 /* Returns a freshly allocated buffer containing the entire contents 115 of FILE (as determined by ui_file_put()) with a NUL character 116 appended. LENGTH, if not NULL, is set to the size of the buffer 117 minus that appended NUL. */ 118 extern char *ui_file_xstrdup (struct ui_file *file, long *length); 119 120 /* Similar to ui_file_xstrdup, but return a new string allocated on 121 OBSTACK. */ 122 extern char *ui_file_obsavestring (struct ui_file *file, 123 struct obstack *obstack, long *length); 124 125 extern long ui_file_read (struct ui_file *file, char *buf, long length_buf); 126 127 extern int ui_file_fseek (struct ui_file *file, long offset, int whence); 128 129 /* Create/open a memory based file. Can be used as a scratch buffer 130 for collecting output. */ 131 extern struct ui_file *mem_fileopen (void); 132 133 134 135 /* Open/create a STDIO based UI_FILE using the already open FILE. */ 136 extern struct ui_file *stdio_fileopen (FILE *file); 137 138 /* Likewise, for stderr-like streams. */ 139 extern struct ui_file *stderr_fileopen (FILE *file); 140 141 142 /* Open NAME returning an STDIO based UI_FILE. */ 143 extern struct ui_file *gdb_fopen (const char *name, const char *mode); 144 145 /* Create a file which writes to both ONE and TWO. CLOSE_ONE 146 and CLOSE_TWO indicate whether the original files should be 147 closed when the new file is closed. */ 148 extern struct ui_file *tee_file_new (struct ui_file *one, 149 int close_one, 150 struct ui_file *two, 151 int close_two); 152 #endif 153