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 m_struct_set(const m_struct_t *st, void *obj, const char *field,
  71                  struct bstr param)
  72 {
  73   const m_option_t* f = m_struct_get_field(st,field);
  74
  75   if(!f) {
  76     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s doesn't have any %s field\n",
  77            st->name,field);
  78     return 0;
  79   }
  80
  81   if(f->type->parse(f, bstr(field), param, false, M_ST_MB_P(obj,f->p)) < 0) {
  82     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s, field %s parsing error: %.*s\n",
  83            st->name, field, BSTR_P(param));
  84     return 0;
  85   }
  86
  87   return 1;
  88 }
  89
  90 void
  91 m_struct_reset(const m_struct_t* st, void* obj, const char* field) {
  92   const m_option_t* f;
  93
  94   if(!field) { // Reset all options
  95     int i;
  96     for(i = 0 ; st->fields[i].name ; i++)
  97       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));
  98     return;
  99   }
 100
 101   // Only one
 102   f = m_struct_get_field(st,field);
 103   if(!f) {
 104     mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Struct %s doesn't have any %s field\n",
 105            st->name,field);
 106     return;
 107   }
 108   m_option_copy(f,M_ST_MB_P(obj,f->p),M_ST_MB_P(st->defaults,f->p));
 109 }
 110
 111 /// Free an allocated struct
 112 void
 113 m_struct_free(const m_struct_t* st, void* obj) {
 114   int i;
 115
 116   for(i = 0 ; st->fields[i].name ; i++)
 117     m_option_free(&st->fields[i],M_ST_MB_P(obj,st->fields[i].p));
 118   free(obj);
 119 }
 120
 121 void*
 122 m_struct_copy(const m_struct_t* st, void* obj) {
 123   void* r = malloc(st->size);
 124   int i;
 125
 126   memcpy(r,obj,st->size);
 127   for(i = 0 ; st->fields[i].name ; i++) {
 128     if(st->fields[i].type->flags & M_OPT_TYPE_DYNAMIC)
 129       memset(M_ST_MB_P(r,st->fields[i].p),0,st->fields[i].type->size);
 130     m_option_copy(&st->fields[i],M_ST_MB_P(r,st->fields[i].p),M_ST_MB_P(obj,st->fields[i].p));
 131   }
 132
 133   return r;
 134 }