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/* Copyright (C) 1997, 1998, 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: gsargs.h,v 1.7 2002/06/16 08:45:42 lpd Exp $ */
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/* Command line argument list management */
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#ifndef gsargs_INCLUDED
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# define gsargs_INCLUDED
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/*
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* We need to handle recursion into @-files.
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* The following structures keep track of the state.
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* Defining a maximum argument length and a maximum nesting depth
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* decreases generality, but eliminates the need for dynamic allocation.
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*/
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#define arg_str_max 2048
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#define arg_depth_max 10
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typedef struct arg_source_s {
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bool is_file;
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union _u {
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struct _su {
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char *chars; /* original string */
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gs_memory_t *memory; /* if non-0, free chars when done with it */
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const char *str; /* string being read */
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} s;
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FILE *file;
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} u;
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} arg_source;
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typedef struct arg_list_s {
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bool expand_ats; /* if true, expand @-files */
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FILE *(*arg_fopen) (const char *fname, void *fopen_data);
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void *fopen_data;
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const char **argp;
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int argn;
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int depth; /* depth of @-files */
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char cstr[arg_str_max + 1];
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arg_source sources[arg_depth_max];
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} arg_list;
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/* Initialize an arg list. */
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void arg_init(arg_list * pal, const char **argv, int argc,
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FILE * (*arg_fopen) (const char *fname, void *fopen_data),
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void *fopen_data);
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/*
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* Push a string onto an arg list.
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* This may also be used (once) to "unread" the last argument.
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* If mem != 0, it is used to free the string when we are done with it.
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* Return 0 on success, non-zero on failure
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*/
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int arg_push_memory_string(arg_list * pal, char *str, gs_memory_t * mem);
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#define arg_push_string(pal, str)\
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arg_push_memory_string(pal, str, (gs_memory_t *)0);
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/* Clean up an arg list before exiting. */
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void arg_finit(arg_list * pal);
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/*
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* Get the next arg from a list.
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* Note that these are not copied to the heap.
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*/
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const char *arg_next(arg_list * pal, int *code);
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/* Copy an argument string to the heap. */
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char *arg_copy(const char *str, gs_memory_t * mem);
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#endif /* gsargs_INCLUDED */
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