m_struct.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer 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
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 /// \file
  20 /// \ingroup OptionsStruct
  21
  22 #include "config.h"
  23
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "m_option.h"
  28 #include "m_struct.h"
  29 #include "mp_msg.h"
  30
  31 const m_option_t*
  32 m_struct_get_field(const m_struct_t* st,const char* f) {
  33   int i;
  34
  35   for(i = 0 ; st->fields[i].name ; i++) {
  36     if(strcasecmp(st->fields[i].name,f) == 0)
  37       return &st->fields[i];
  38   }
  39   return NULL;
  40 }
  41
  42 void*
  43 m_struct_alloc(const m_struct_t* st) {
  44   int i;
  45   void* r;
  46
  47   if(!st->defaults) {
  48     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s needs defaults\n",st->name);
  49     return NULL;
  50   }
  51
  52   r = calloc(1,st->size);
  53   memcpy(r,st->defaults,st->size);
  54
  55   for(i = 0 ; st->fields[i].name ; i++) {
  56     if(st->fields[i].type->flags & M_OPT_TYPE_DYNAMIC)
  57       memset(M_ST_MB_P(r,st->fields[i].p),0,st->fields[i].type->size);
  58     m_option_copy(&st->fields[i],M_ST_MB_P(r,st->fields[i].p),M_ST_MB_P(st->defaults,st->fields[i].p));
  59   }
  60   return r;
  61 }
  62
  63 int m_struct_set(const m_struct_t *st, void *obj, const char *field,
  64                  struct bstr param)
  65 {
  66   const m_option_t* f = m_struct_get_field(st,field);
  67
  68   if(!f) {
  69     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s doesn't have any %s field\n",
  70            st->name,field);
  71     return 0;
  72   }
  73
  74   if(f->type->parse(f, bstr(field), param, false, M_ST_MB_P(obj,f->p), NULL) < 0) {
  75     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s, field %s parsing error: %.*s\n",
  76            st->name, field, BSTR_P(param));
  77     return 0;
  78   }
  79
  80   return 1;
  81 }
  82
  83 void
  84 m_struct_reset(const m_struct_t* st, void* obj, const char* field) {
  85   const m_option_t* f;
  86
  87   if(!field) { // Reset all options
  88     int i;
  89     for(i = 0 ; st->fields[i].name ; i++)
  90       m_option_copy(&st->fields[i],M_ST_MB_P(obj,st->fields[i].p),M_ST_MB_P(st->defaults,st->fields[i].p));
  91     return;
  92   }
  93
  94   // Only one
  95   f = m_struct_get_field(st,field);
  96   if(!f) {
  97     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s doesn't have any %s field\n",
  98            st->name,field);
  99     return;
 100   }
 101   m_option_copy(f,M_ST_MB_P(obj,f->p),M_ST_MB_P(st->defaults,f->p));
 102 }
 103
 104 /// Free an allocated struct
 105 void
 106 m_struct_free(const m_struct_t* st, void* obj) {
 107   int i;
 108
 109   for(i = 0 ; st->fields[i].name ; i++)
 110     m_option_free(&st->fields[i],M_ST_MB_P(obj,st->fields[i].p));
 111   free(obj);
 112 }
 113
 114 void*
 115 m_struct_copy(const m_struct_t* st, void* obj) {
 116   void* r = malloc(st->size);
 117   int i;
 118
 119   memcpy(r,obj,st->size);
 120   for(i = 0 ; st->fields[i].name ; i++) {
 121     if(st->fields[i].type->flags & M_OPT_TYPE_DYNAMIC)
 122       memset(M_ST_MB_P(r,st->fields[i].p),0,st->fields[i].type->size);
 123     m_option_copy(&st->fields[i],M_ST_MB_P(r,st->fields[i].p),M_ST_MB_P(obj,st->fields[i].p));
 124   }
 125
 126   return r;
 127 }