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/* Copyright (C) 1993, 1999 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: gsfname.c,v 1.4 2002/02/21 22:24:52 giles Exp $ */
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/* File name utilities */
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#include "memory_.h"
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#include "gserror.h"
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#include "gserrors.h"
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#include "gsmemory.h"
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#include "gstypes.h"
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#include "gsfname.h"
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#include "gxiodev.h"
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/* Parse a file name into device and individual name. */
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/* The device may be NULL, or the name may be NULL, but not both. */
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/* According to the Adobe documentation, %device and %device% */
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/* are equivalent; both return name==NULL. */
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int
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gs_parse_file_name(gs_parsed_file_name_t * pfn, const char *pname, uint len)
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{
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uint dlen;
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const char *pdelim;
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gx_io_device *iodev;
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if (len == 0)
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return_error(gs_error_undefinedfilename); /* null name not allowed */
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if (pname[0] != '%') { /* no device */
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pfn->memory = 0;
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pfn->iodev = NULL;
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pfn->fname = pname;
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pfn->len = len;
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return 0;
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}
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pdelim = memchr(pname + 1, '%', len - 1);
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if (pdelim == NULL) /* %device */
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dlen = len;
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else if (pdelim[1] == 0) { /* %device% */
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pdelim = NULL;
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dlen = len;
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} else {
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dlen = pdelim - pname;
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pdelim++, len--;
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}
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iodev = gs_findiodevice((const byte *)pname, dlen);
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if (iodev == 0)
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return_error(gs_error_undefinedfilename);
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pfn->memory = 0;
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pfn->iodev = iodev;
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pfn->fname = pdelim;
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pfn->len = len - dlen;
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return 0;
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}
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/* Parse a real (non-device) file name and convert to a C string. */
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int
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gs_parse_real_file_name(gs_parsed_file_name_t * pfn, const char *pname,
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uint len, gs_memory_t *mem, client_name_t cname)
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{
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int code = gs_parse_file_name(pfn, pname, len);
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if (code < 0)
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return code;
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if (pfn->len == 0)
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return_error(gs_error_invalidfileaccess); /* device only */
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return gs_terminate_file_name(pfn, mem, cname);
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}
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/* Convert a file name to a C string by adding a null terminator. */
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int
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gs_terminate_file_name(gs_parsed_file_name_t * pfn, gs_memory_t *mem,
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client_name_t cname)
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{
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uint len = pfn->len;
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char *fname;
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if (pfn->iodev == NULL) /* no device */
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pfn->iodev = iodev_default;
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if (pfn->memory)
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return 0; /* already copied */
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/* Copy the file name to a C string. */
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fname = (char *)gs_alloc_string(mem, len + 1, cname);
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if (fname == 0)
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return_error(gs_error_VMerror);
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memcpy(fname, pfn->fname, len);
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fname[len] = 0;
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pfn->memory = mem;
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pfn->fname = fname;
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pfn->len = len + 1; /* null terminator */
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return 0;
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}
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/* Free a file name that was copied to a C string. */
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void
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gs_free_file_name(gs_parsed_file_name_t * pfn, client_name_t cname)
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{
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if (pfn->fname != 0)
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gs_free_const_string(pfn->memory, (const byte *)pfn->fname, pfn->len,
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cname);
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}
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