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- /* Copyright (C) 1993, 1994, 1996 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* gsiodev.c */
- /* IODevice implementation for Ghostscript */
- #include "errno_.h"
- #include "string_.h"
- #include "gx.h"
- #include "gserrors.h"
- #include "gp.h"
- #include "gsparam.h"
- #include "gxiodev.h"
-
- /* Import the IODevice table from gconfig.c. */
- extern gx_io_device *gx_io_device_table[];
- extern uint gx_io_device_table_count;
-
- /* Define the OS (%os%) device. */
- iodev_proc_fopen(iodev_os_fopen);
- iodev_proc_fclose(iodev_os_fclose);
- private iodev_proc_delete_file(os_delete);
- private iodev_proc_rename_file(os_rename);
- private iodev_proc_file_status(os_status);
- private iodev_proc_enumerate_files(os_enumerate);
- private iodev_proc_get_params(os_get_params);
- gx_io_device gs_iodev_os = {
- "%os%", "FileSystem",
- { iodev_no_init, iodev_no_open_device,
- NULL /*iodev_os_open_file*/, iodev_os_fopen, iodev_os_fclose,
- os_delete, os_rename, os_status,
- os_enumerate, gp_enumerate_files_next, gp_enumerate_files_close,
- os_get_params, iodev_no_put_params
- }
- };
-
- /* ------ Initialization ------ */
-
- void
- gs_iodev_init(gs_memory_t *mem)
- { /* Run the one-time initialization of each IODevice. */
- gx_io_device **piodev = &gx_io_device_table[0];
- for ( ; *piodev; piodev++ )
- ((*piodev)->procs.init)(*piodev, mem);
- }
-
- /* ------ Default (unimplemented) IODevice procedures ------ */
-
- int
- iodev_no_init(gx_io_device *iodev, gs_memory_t *mem)
- { return 0;
- }
-
- int
- iodev_no_open_device(gx_io_device *iodev, const char *access, stream **ps,
- gs_memory_t *mem)
- { return_error(gs_error_invalidfileaccess);
- }
-
- int
- iodev_no_open_file(gx_io_device *iodev, const char *fname, uint namelen,
- const char *access, stream **ps, gs_memory_t *mem)
- { return_error(gs_error_invalidfileaccess);
- }
-
- int
- iodev_no_fopen(gx_io_device *iodev, const char *fname, const char *access,
- FILE **pfile, char *rfname, uint rnamelen)
- { return_error(gs_error_invalidfileaccess);
- }
-
- int
- iodev_no_fclose(gx_io_device *iodev, FILE *file)
- { return_error(gs_error_ioerror);
- }
-
- int
- iodev_no_delete_file(gx_io_device *iodev, const char *fname)
- { return_error(gs_error_invalidfileaccess);
- }
-
- int
- iodev_no_rename_file(gx_io_device *iodev, const char *from, const char *to)
- { return_error(gs_error_invalidfileaccess);
- }
-
- int
- iodev_no_file_status(gx_io_device *iodev, const char *fname, struct stat *pstat)
- { return_error(gs_error_undefinedfilename);
- }
-
- file_enum *
- iodev_no_enumerate_files(gx_io_device *iodev, const char *pat, uint patlen,
- gs_memory_t *memory)
- { return NULL;
- }
-
- int
- iodev_no_get_params(gx_io_device *iodev, gs_param_list *plist)
- { return 0;
- }
-
- int
- iodev_no_put_params(gx_io_device *iodev, gs_param_list *plist)
- { return param_commit(plist);
- }
-
- /* ------ %os% ------ */
-
- /* The fopen routine is exported for %null. */
- int
- iodev_os_fopen(gx_io_device *iodev, const char *fname, const char *access,
- FILE **pfile, char *rfname, uint rnamelen)
- { errno = 0;
- *pfile = gp_fopen(fname, access);
- if ( *pfile == NULL )
- return_error(gs_fopen_errno_to_code(errno));
- if ( rfname != NULL )
- strcpy(rfname, fname);
- return 0;
- }
-
- /* The fclose routine is exported for %null. */
- int
- iodev_os_fclose(gx_io_device *iodev, FILE *file)
- { fclose(file);
- return 0;
- }
-
- private int
- os_delete(gx_io_device *iodev, const char *fname)
- { return (unlink(fname) == 0 ? 0 : gs_error_ioerror);
- }
-
- private int
- os_rename(gx_io_device *iodev, const char *from, const char *to)
- { return (rename(from, to) == 0 ? 0 : gs_error_ioerror);
- }
-
- private int
- os_status(gx_io_device *iodev, const char *fname, struct stat *pstat)
- { /* The RS/6000 prototype for stat doesn't include const, */
- /* so we have to explicitly remove the const modifier. */
- return (stat((char *)fname, pstat) < 0 ? gs_error_undefinedfilename : 0);
- }
-
- private file_enum *
- os_enumerate(gx_io_device *iodev, const char *pat, uint patlen,
- gs_memory_t *mem)
- { return gp_enumerate_files_init(pat, patlen, mem);
- }
-
- private int
- os_get_params(gx_io_device *iodev, gs_param_list *plist)
- { /* We aren't going to implement *all* of the Adobe parameters.... */
- int code;
- bool btrue = true;
-
- if ( (code = param_write_bool(plist, "HasNames", &btrue)) < 0 )
- return code;
- return 0;
- }
-
- /* ------ Utilities ------ */
-
- /* Get the N'th IODevice from the known device table. */
- gx_io_device *
- gs_getiodevice(int index)
- { if ( index < 0 || index >= gx_io_device_table_count )
- return 0; /* index out of range */
- return gx_io_device_table[index];
- }
-
- /* Look up an IODevice name. */
- /* The name may be either %device or %device%. */
- gx_io_device *
- gs_findiodevice(const byte *str, uint len)
- { gx_io_device **pftab;
- if ( len > 1 && str[len - 1] == '%' )
- len--;
- for ( pftab = gx_io_device_table; *pftab != NULL; pftab++ )
- { const char *dname = (*pftab)->dname;
- if ( strlen(dname) == len + 1 && !memcmp(str, dname, len) )
- return *pftab;
- }
- return 0;
- }
-
- /* ------ Accessors ------ */
-
- /* Get IODevice parameters. */
- int
- gs_getdevparams(gx_io_device *iodev, gs_param_list *plist)
- { /* All IODevices have the Type parameter. */
- gs_param_string ts;
- int code;
-
- param_string_from_string(ts, iodev->dtype);
- code = param_write_name(plist, "Type", &ts);
- if ( code < 0 )
- return code;
- return (*iodev->procs.get_params)(iodev, plist);
- }
-
- /* Put IODevice parameters. */
- int
- gs_putdevparams(gx_io_device *iodev, gs_param_list *plist)
- { return (*iodev->procs.put_params)(iodev, plist);
- }
-
- /* Convert an OS error number to a PostScript error */
- /* if opening a file fails. */
- int
- gs_fopen_errno_to_code(int eno)
- { /* Different OSs vary widely in their error codes. */
- /* We try to cover as many variations as we know about. */
- switch ( eno )
- {
- #ifdef ENOENT
- case ENOENT:
- return_error(gs_error_undefinedfilename);
- #endif
- #ifdef ENOFILE
- # ifndef ENOENT
- # define ENOENT ENOFILE
- # endif
- # if ENOFILE != ENOENT
- case ENOFILE:
- return_error(gs_error_undefinedfilename);
- # endif
- #endif
- #ifdef ENAMETOOLONG
- case ENAMETOOLONG:
- return_error(gs_error_undefinedfilename);
- #endif
- #ifdef EACCES
- case EACCES:
- return_error(gs_error_invalidfileaccess);
- #endif
- #ifdef EMFILE
- case EMFILE:
- return_error(gs_error_limitcheck);
- #endif
- #ifdef ENFILE
- case ENFILE:
- return_error(gs_error_limitcheck);
- #endif
- default:
- return_error(gs_error_ioerror);
- }
- }
-