File: zfontenum.c

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/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: zfontenum.c 9043 2008-08-28 22:48:19Z giles $ */

/* this is the ps interpreter interface to the native font
   enumeration code. it calls the platform-specific routines
   to obtain an additional set of entries that can be added
   to the Fontmap to reference fonts stored on the system.
 */

#include "memory_.h"
#include "string_.h"
#include <stdlib.h>
#include "ghost.h"
#include "oper.h"
#include "gsstruct.h"
#include "gsmalloc.h"
#include "ialloc.h"
#include "iname.h"
#include "iutil.h"
#include "store.h"
#include "gp.h"


typedef struct fontenum_s {
	char *fontname, *path;
	struct fontenum_s *next;
} fontenum_t;

/* .getnativefonts [ [<name> <path>] ... ] */
static int
z_fontenum(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    void *enum_state;
    int code = 0;
    int e,elements;
    char *fontname, *path;
    fontenum_t *r, *results;
    ref array;
    uint length;
    byte *string;
	
    enum_state = gp_enumerate_fonts_init(imemory);
    if (enum_state == NULL) {
      /* put false on the stack and return */
      push(1);
      make_bool(op, false);
      return code;
    }

    r = results = gs_malloc(imemory->non_gc_memory, 1, sizeof(fontenum_t), "fontenum list");
    elements = 0;
    while((code = gp_enumerate_fonts_next(enum_state, &fontname, &path )) > 0) {
	if (fontname == NULL || path == NULL) {
	    gp_enumerate_fonts_free(enum_state);
	    return_error(e_ioerror);
	}

	length = strlen(fontname) + 1;
	r->fontname = gs_malloc(imemory->non_gc_memory, length, 1, "native font name");
	memcpy(r->fontname, fontname, length);

	length = strlen(path) + 1;
	    r->path = gs_malloc(imemory->non_gc_memory, length, 1, "native font path");
	    memcpy(r->path, path, length);

	    r->next = gs_malloc(imemory->non_gc_memory, 1, sizeof(fontenum_t), "fontenum list");
	    r = r->next;
	    elements += 1;
	}
	
	gp_enumerate_fonts_free(enum_state);

	code = ialloc_ref_array(&array, a_all | icurrent_space, elements, "native fontmap");

	r = results;
	for (e = 0; e < elements; e++) {
	    ref mapping;
	
	    code = ialloc_ref_array(&mapping, a_all | icurrent_space, 2, "native font mapping");
		
	    length = strlen(r->fontname);
	    string = ialloc_string(length, "native font name");
	    if (string == NULL)
		return_error(e_VMerror);
	    memcpy(string, r->fontname, length);
	    make_string(&(mapping.value.refs[0]), a_all | icurrent_space, length, string);
	 	
	    length = strlen(r->path);
	    string = ialloc_string(length, "native font path");
	    if (string == NULL)
		return_error(e_VMerror);
	    memcpy(string, r->path, length);
	    make_string(&(mapping.value.refs[1]), a_all | icurrent_space, length, string);
	 	
	    ref_assign(&(array.value.refs[e]), &mapping);
	    results = r;
	    r = r->next;

	    gs_free(imemory->non_gc_memory, 
		    results->fontname, strlen(results->fontname) + 1, 1, "native font name");
	    gs_free(imemory->non_gc_memory, 
		    results->path, strlen(results->path) + 1, 1, "native font path");
	    gs_free(imemory->non_gc_memory, 
		    results, 1, sizeof(fontenum_t), "fontenum list");
	}

    push(2);   
    ref_assign(op-1, &array);
    make_bool(op, true);
	
    return code;
}


/* Match the above routines to their postscript filter names.
   This is how our static routines get called externally. */
const op_def zfontenum_op_defs[] = {
    {"0.getnativefonts", z_fontenum},
    op_def_end(0)
};