swfdec/swfdec_utils.c

   1 /* Swfdec
   2  * Copyright (C) 2007-2008 Benjamin Otte <otte@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "swfdec_utils.h"
  25
  26 #include <math.h>
  27 #include <string.h>
  28
  29 #include "swfdec_as_internal.h"
  30 #include "swfdec_as_object.h"
  31 #include "swfdec_as_strings.h"
  32
  33 gboolean
  34 swfdec_str_case_equal (gconstpointer v1, gconstpointer v2)
  35 {
  36   const char *s1 = v1;
  37   const char *s2 = v2;
  38
  39   return g_ascii_strcasecmp (s1, s2) == 0;
  40 }
  41
  42 guint
  43 swfdec_str_case_hash (gconstpointer v)
  44 {
  45   const signed char *p;
  46   guint32 h = 0;
  47
  48   for (p = v; *p != '\0'; p++)
  49     h = (h << 5) - h + (*p & 0xDF);
  50
  51   return h;
  52 }
  53
  54 int
  55 swfdec_strcmp (guint version, const char *s1, const char *s2)
  56 {
  57   g_return_val_if_fail (s1 != NULL, 0);
  58   g_return_val_if_fail (s2 != NULL, 0);
  59
  60   if (version < 7) {
  61     return g_ascii_strcasecmp (s1, s2);
  62   } else {
  63     return strcmp (s1, s2);
  64   }
  65 }
  66
  67 int
  68 swfdec_strncmp (guint version, const char *s1, const char *s2, guint n)
  69 {
  70   g_return_val_if_fail (s1 != NULL, 0);
  71   g_return_val_if_fail (s2 != NULL, 0);
  72
  73   if (version < 7) {
  74     return g_ascii_strncasecmp (s1, s2, n);
  75   } else {
  76     return strncmp (s1, s2, n);
  77   }
  78 }
  79
  80 gboolean
  81 swfdec_matrix_from_as_object (cairo_matrix_t *matrix, SwfdecAsObject *object)
  82 {
  83   SwfdecAsValue *val;
  84   SwfdecAsContext *cx = object->context;
  85
  86   val = swfdec_as_object_peek_variable (object, SWFDEC_AS_STR_a);
  87   if (val == NULL ||
  88       !isfinite (matrix->xx = swfdec_as_value_to_number (cx, *val)))
  89     return FALSE;
  90   val = swfdec_as_object_peek_variable (object, SWFDEC_AS_STR_b);
  91   if (val == NULL ||
  92       !isfinite (matrix->yx = swfdec_as_value_to_number (cx, *val)))
  93     return FALSE;
  94   val = swfdec_as_object_peek_variable (object, SWFDEC_AS_STR_c);
  95   if (val == NULL ||
  96       !isfinite (matrix->xy = swfdec_as_value_to_number (cx, *val)))
  97     return FALSE;
  98   val = swfdec_as_object_peek_variable (object, SWFDEC_AS_STR_d);
  99   if (val == NULL ||
 100       !isfinite (matrix->yy = swfdec_as_value_to_number (cx, *val)))
 101     return FALSE;
 102
 103   val = swfdec_as_object_peek_variable (object, SWFDEC_AS_STR_tx);
 104   if (val == NULL)
 105       return FALSE;
 106   matrix->x0 = swfdec_as_value_to_number (cx, *val);
 107   if (!isfinite (matrix->x0))
 108     matrix->x0 = 0;
 109   val = swfdec_as_object_peek_variable (object, SWFDEC_AS_STR_ty);
 110   if (val == NULL)
 111       return FALSE;
 112   matrix->y0 = swfdec_as_value_to_number (cx, *val);
 113   if (!isfinite (matrix->y0))
 114     matrix->y0 = 0;
 115
 116   return TRUE;
 117 }
 118