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- /* Copyright (C) 1997 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.
- */
-
- /* gsargs.c */
- /* Command line argument list management */
- #include "ctype_.h"
- #include "stdio_.h"
- #include "string_.h"
- #include "gsexit.h"
- #include "gsmemory.h"
- #include "gsargs.h"
-
- /* Initialize an arg list. */
- void
- arg_init(arg_list *pal, const char **argv, int argc,
- FILE *(*arg_fopen)(P2(const char *fname, void *fopen_data)),
- void *fopen_data)
- { pal->expand_ats = true;
- pal->arg_fopen = arg_fopen;
- pal->fopen_data = fopen_data;
- pal->argp = argv + 1;
- pal->argn = argc - 1;
- pal->depth = 0;
- }
-
- /* Push a string onto an arg list. */
- void
- arg_push_string(arg_list *pal, const char *str)
- { arg_source *pas;
-
- if ( pal->depth == arg_depth_max )
- { lprintf("Too much nesting of @-files.\n");
- gs_exit(1);
- }
- pas = &pal->sources[pal->depth];
- pas->is_file = false;
- pas->u.str = str;
- pal->depth++;
- }
-
- /* Clean up an arg list. */
- void
- arg_finit(arg_list *pal)
- { while ( pal->depth )
- if ( pal->sources[--(pal->depth)].is_file )
- fclose(pal->sources[pal->depth].u.file);
- }
-
- /* Get the next arg from a list. */
- /* Note that these are not copied to the heap. */
- const char *
- arg_next(arg_list *pal)
- { arg_source *pas;
- FILE *f;
- const char *astr = 0; /* initialized only to pacify gcc */
- char *cstr;
- const char *result;
- int endc;
- register int c;
- register int i;
- bool in_quote;
-
- top: pas = &pal->sources[pal->depth - 1];
- if ( pal->depth == 0 )
- { if ( pal->argn <= 0 ) /* all done */
- return 0;
- pal->argn--;
- result = *(pal->argp++);
- goto at;
- }
- if ( pas->is_file )
- f = pas->u.file, endc = EOF;
- else
- astr = pas->u.str, f = NULL, endc = 0;
- result = cstr = pal->cstr;
- #define cfsgetc() (f == NULL ? (*astr ? *astr++ : 0) : fgetc(f))
- while ( isspace(c = cfsgetc()) ) ;
- if ( c == endc )
- { if ( f != NULL )
- fclose(f);
- pal->depth--;
- goto top;
- }
- in_quote = false;
- for ( i = 0; ; )
- { if ( i == arg_str_max - 1 )
- { cstr[i] = 0;
- fprintf(stdout, "Command too long: %s\n", cstr);
- gs_exit(1);
- }
- /* If input is coming from an @-file, allow quotes */
- /* to protect whitespace. */
- if ( c == '"' && f != NULL )
- in_quote = !in_quote;
- else
- cstr[i++] = c;
- c = cfsgetc();
- if ( c == endc )
- { if ( in_quote )
- { cstr[i] = 0;
- fprintf(stdout,
- "Unterminated quote in @-file: %s\n",
- cstr);
- gs_exit(1);
- }
- break;
- }
- if ( isspace(c) && !in_quote )
- break;
- }
- cstr[i] = 0;
- if ( f == NULL )
- pas->u.str = astr;
- at: if ( pal->expand_ats && result[0] == '@' )
- { if ( pal->depth == arg_depth_max )
- { lprintf("Too much nesting of @-files.\n");
- gs_exit(1);
- }
- result++; /* skip @ */
- f = (*pal->arg_fopen)(result, pal->fopen_data);
- if ( f == NULL )
- { fprintf(stdout, "Unable to open command line file %s\n", result);
- gs_exit(1);
- }
- pal->depth++;
- pas++;
- pas->is_file = true;
- pas->u.file = f;
- goto top;
- }
- return result;
- }
-
- /* Copy an argument string to the heap. */
- char *
- arg_copy(const char *str, gs_memory_t *mem)
- { char *sstr = (char *)gs_alloc_bytes(mem, strlen(str) + 1, "arg_copy");
- if ( sstr == 0 )
- { lprintf("Out of memory!\n");
- gs_exit(1);
- }
- strcpy(sstr, str);
- return sstr;
- }
-