harvey/sys/src/cmd/gs/src/zfontenum.c

/* Copyright (C) 2003 artofcode LLC.  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 the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: zfontenum.c,v 1.4 2004/08/04 19:36:13 stefan Exp $ */

/* 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>] ... ] */
private 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 'private' routines get called externally */
const op_def zfontenum_op_defs[] = {
    {"0.getnativefonts", z_fontenum},
    op_def_end(0)
};