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   // Check the struct fields
  52   for(i = 0 ; st->fields[i].name ; i++) {
  53     if(st->fields[i].type->flags & M_OPT_TYPE_INDIRECT) {
  54       mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s->%s: Option types with the indirect flag are forbidden.\n",st->name,st->fields[i].name);
  55       return NULL;
  56     }
  57   }
  58
  59   r = calloc(1,st->size);
  60   memcpy(r,st->defaults,st->size);
  61
  62   for(i = 0 ; st->fields[i].name ; i++) {
  63     if(st->fields[i].type->flags & M_OPT_TYPE_DYNAMIC)
  64       memset(M_ST_MB_P(r,st->fields[i].p),0,st->fields[i].type->size);
  65     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));
  66   }
  67   return r;
  68 }
  69
  70 int
  71 m_struct_set(const m_struct_t* st, void* obj, const char* field, const char* param) {
  72   const m_option_t* f = m_struct_get_field(st,field);
  73
  74   if(!f) {
  75     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s doesn't have any %s field\n",
  76            st->name,field);
  77     return 0;
  78   }
  79
  80   if(f->type->parse(f,field,param,M_ST_MB_P(obj,f->p),M_CONFIG_FILE) < 0) {
  81     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s, field %s parsing error: %s\n",
  82            st->name,field,param);
  83     return 0;
  84   }
  85
  86   return 1;
  87 }
  88
  89 void
  90 m_struct_reset(const m_struct_t* st, void* obj, const char* field) {
  91   const m_option_t* f;
  92
  93   if(!field) { // Reset all options
  94     int i;
  95     for(i = 0 ; st->fields[i].name ; i++)
  96       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));
  97     return;
  98   }
  99
 100   // Only one
 101   f = m_struct_get_field(st,field);
 102   if(!f) {
 103     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s doesn't have any %s field\n",
 104            st->name,field);
 105     return;
 106   }
 107   m_option_copy(f,M_ST_MB_P(obj,f->p),M_ST_MB_P(st->defaults,f->p));
 108 }
 109
 110 /// Free an allocated struct
 111 void
 112 m_struct_free(const m_struct_t* st, void* obj) {
 113   int i;
 114
 115   for(i = 0 ; st->fields[i].name ; i++)
 116     m_option_free(&st->fields[i],M_ST_MB_P(obj,st->fields[i].p));
 117   free(obj);
 118 }
 119
 120 void*
 121 m_struct_copy(const m_struct_t* st, void* obj) {
 122   void* r = malloc(st->size);
 123   int i;
 124
 125   memcpy(r,obj,st->size);
 126   for(i = 0 ; st->fields[i].name ; i++) {
 127     if(st->fields[i].type->flags & M_OPT_TYPE_DYNAMIC)
 128       memset(M_ST_MB_P(r,st->fields[i].p),0,st->fields[i].type->size);
 129     m_option_copy(&st->fields[i],M_ST_MB_P(r,st->fields[i].p),M_ST_MB_P(obj,st->fields[i].p));
 130   }
 131
 132   return r;
 133 }