1 /* Copyright (C) 2000 Aladdin Enterprises. All rights reserved. 2 3 This file is part of AFPL Ghostscript. 4 5 AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or 6 distributor accepts any responsibility for the consequences of using it, or 7 for whether it serves any particular purpose or works at all, unless he or 8 she says so in writing. Refer to the Aladdin Free Public License (the 9 "License") for full details. 10 11 Every copy of AFPL Ghostscript must include a copy of the License, normally 12 in a plain ASCII text file named PUBLIC. The License grants you the right 13 to copy, modify and redistribute AFPL Ghostscript, but only under certain 14 conditions described in the License. Among other things, the License 15 requires that the copyright notice and this notice be preserved on all 16 copies. 17 */ 18 19 /*$Id: gsiodevs.c,v 1.2 2000/09/19 19:00:29 lpd Exp $ */ 20 /* %stdxxx IODevice implementation for non-PostScript configurations */ 21 #include "gx.h" 22 #include "gserrors.h" 23 #include "gxiodev.h" 24 #include "stream.h" 25 #include "strimpl.h" 26 27 const char iodev_dtype_stdio[] = "Special"; 28 #define iodev_stdio(dname, open) {\ 29 dname, iodev_dtype_stdio,\ 30 { iodev_no_init, open, iodev_no_open_file,\ 31 iodev_no_fopen, iodev_no_fclose,\ 32 iodev_no_delete_file, iodev_no_rename_file, iodev_no_file_status,\ 33 iodev_no_enumerate_files, NULL, NULL,\ 34 iodev_no_get_params, iodev_no_put_params\ 35 }\ 36 } 37 38 #define STDIO_BUF_SIZE 128 39 private int 40 stdio_close_file(stream *s) 41 { 42 /* Don't close stdio files, but do free the buffer. */ 43 gs_memory_t *mem = s->memory; 44 45 s->file = 0; 46 gs_free_object(mem, s->cbuf, "stdio_close_file(buffer)"); 47 return 0; 48 } 49 private int 50 stdio_open(gx_io_device * iodev, const char *access, stream ** ps, 51 gs_memory_t * mem, char rw, FILE *file, 52 void (*srw_file)(P4(stream *, FILE *, byte *, uint))) 53 { 54 stream *s; 55 byte *buf; 56 57 if (!streq1(access, rw)) 58 return_error(gs_error_invalidfileaccess); 59 s = s_alloc(mem, "stdio_open(stream)"); 60 buf = gs_alloc_bytes(mem, STDIO_BUF_SIZE, "stdio_open(buffer)"); 61 if (s == 0 || buf == 0) { 62 gs_free_object(mem, buf, "stdio_open(buffer)"); 63 gs_free_object(mem, s, "stdio_open(stream)"); 64 return_error(gs_error_VMerror); 65 } 66 srw_file(s, file, buf, STDIO_BUF_SIZE); 67 s->procs.close = stdio_close_file; 68 *ps = s; 69 return 0; 70 } 71 72 private int 73 stdin_open(gx_io_device * iodev, const char *access, stream ** ps, 74 gs_memory_t * mem) 75 { 76 return stdio_open(iodev, access, ps, mem, 'r', gs_stdin, sread_file); 77 } 78 const gx_io_device gs_iodev_stdin = iodev_stdio("%stdin%", stdin_open); 79 80 private int 81 stdout_open(gx_io_device * iodev, const char *access, stream ** ps, 82 gs_memory_t * mem) 83 { 84 return stdio_open(iodev, access, ps, mem, 'w', gs_stdout, swrite_file); 85 } 86 const gx_io_device gs_iodev_stdout = iodev_stdio("%stdout%", stdout_open); 87 88 private int 89 stderr_open(gx_io_device * iodev, const char *access, stream ** ps, 90 gs_memory_t * mem) 91 { 92 return stdio_open(iodev, access, ps, mem, 'w', gs_stderr, swrite_file); 93 } 94 const gx_io_device gs_iodev_stderr = iodev_stdio("%stderr%", stderr_open); 95