m_option.h

   1 #ifndef _M_OPTION_H
   2 #define _M_OPTION_H
   3
   4 typedef struct m_option_type m_option_type_t;
   5 typedef struct m_option m_option_t;
   6 struct m_struct_st;
   7
   8 ///////////////////////////// Options types declarations ////////////////////////////
   9
  10 // Simple types
  11 extern m_option_type_t m_option_type_flag;
  12 extern m_option_type_t m_option_type_int;
  13 extern m_option_type_t m_option_type_float;
  14 extern m_option_type_t m_option_type_double;
  15 extern m_option_type_t m_option_type_string;
  16 extern m_option_type_t m_option_type_string_list;
  17 extern m_option_type_t m_option_type_position;
  18
  19 extern m_option_type_t m_option_type_print;
  20 extern m_option_type_t m_option_type_print_indirect;
  21 extern m_option_type_t m_option_type_subconfig;
  22 extern m_option_type_t m_option_type_imgfmt;
  23
  24 // Func based types
  25 extern m_option_type_t m_option_type_func_full;
  26 extern m_option_type_t m_option_type_func_param;
  27 extern m_option_type_t m_option_type_func;
  28
  29 typedef void (*m_opt_default_func_t)(m_option_t *, char*);
  30 typedef int (*m_opt_func_full_t)(m_option_t *, char *, char *);
  31 typedef int (*m_opt_func_param_t)(m_option_t *, char *);
  32 typedef int (*m_opt_func_t)(m_option_t *);
  33 ///////////// Backward compat
  34 typedef m_opt_default_func_t cfg_default_func_t;
  35 typedef m_opt_func_full_t cfg_func_arg_param_t;
  36 typedef m_opt_func_param_t cfg_func_param_t;
  37 typedef m_opt_func_t cfg_func_t;
  38
  39 typedef struct {
  40   void** list;
  41   void* name_off;
  42   void* info_off;
  43   void* desc_off;
  44 } m_obj_list_t;
  45
  46 typedef struct {
  47   char* name;
  48   char** attribs;
  49 } m_obj_settings_t;
  50 extern m_option_type_t m_option_type_obj_settings_list;
  51
  52 // Presets are mean to be used with options struct
  53
  54
  55 typedef struct {
  56   struct m_struct_st* in_desc;
  57   struct m_struct_st* out_desc;
  58   void* presets; // Pointer to an arry of struct defined by in_desc
  59   void* name_off; // Offset of the preset name inside the in_struct
  60 } m_obj_presets_t;
  61 extern m_option_type_t m_option_type_obj_presets;
  62
  63 extern m_option_type_t m_option_type_custom_url;
  64
  65 typedef struct {
  66   struct m_struct_st* desc; // Fields description
  67   char separator; // Field separator to use
  68 } m_obj_params_t;
  69 extern m_option_type_t m_option_type_obj_params;
  70
  71 typedef struct {
  72   int start;
  73   int end;
  74 } m_span_t;
  75 extern m_obj_params_t m_span_params_def;
  76
  77
  78 // FIXME: backward compatibility
  79 #define CONF_TYPE_FLAG          (&m_option_type_flag)
  80 #define CONF_TYPE_INT           (&m_option_type_int)
  81 #define CONF_TYPE_FLOAT         (&m_option_type_float)
  82 #define CONF_TYPE_DOUBLE        (&m_option_type_double)
  83 #define CONF_TYPE_STRING        (&m_option_type_string)
  84 #define CONF_TYPE_FUNC          (&m_option_type_func)
  85 #define CONF_TYPE_FUNC_PARAM    (&m_option_type_func_param)
  86 #define CONF_TYPE_PRINT         (&m_option_type_print)
  87 #define CONF_TYPE_PRINT_INDIRECT (&m_option_type_print_indirect)
  88 #define CONF_TYPE_FUNC_FULL     (&m_option_type_func_full)
  89 #define CONF_TYPE_SUBCONFIG     (&m_option_type_subconfig)
  90 #define CONF_TYPE_STRING_LIST   (&m_option_type_string_list)
  91 #define CONF_TYPE_POSITION      (&m_option_type_position)
  92 #define CONF_TYPE_IMGFMT        (&m_option_type_imgfmt)
  93 #define CONF_TYPE_SPAN          (&m_option_type_span)
  94 #define CONF_TYPE_OBJ_SETTINGS_LIST (&m_option_type_obj_settings_list)
  95 #define CONF_TYPE_OBJ_PRESETS   (&m_option_type_obj_presets)
  96 #define CONF_TYPE_CUSTOM_URL    (&m_option_type_custom_url)
  97 #define CONF_TYPE_OBJ_PARAMS    (&m_option_type_obj_params)
  98
  99 /////////////////////////////////////////////////////////////////////////////////////////////
 100
 101 struct m_option_type {
 102   char* name;
 103   char* comments; // syntax desc, etc
 104   unsigned int size; // size needed for a save slot
 105   unsigned int flags;
 106
 107   // parse is the only requiered function all others can be NULL
 108   // If dst if non-NULL it should create/update the save slot
 109   // If dst is NULL it should just test the validity of the arg if possible
 110   // Src tell from where come this setting (ie cfg file, command line, playlist, ....
 111   // It should return 1 if param was used, 0 if not.
 112   // On error it must return 1 of the error code below
 113   int (*parse)(m_option_t* opt,char *name, char *param, void* dst, int src);
 114   // Print back a value in human form
 115   char* (*print)(m_option_t* opt,  void* val);
 116
 117   // These 3 will be a memcpy in 50% of the case, it's called to save/restore the status of
 118   // the var it's there for complex type like CONF_TYPE_FUNC*
 119   // update a save slot (dst) from the current value in the prog (src)
 120   void (*save)(m_option_t* opt,void* dst, void* src);
 121   // set the current value (dst) from a save slot
 122   void (*set)(m_option_t* opt,void* dst, void* src);
 123   // Copy betewen 2 slot (if NULL and size > 0 a memcpy will be used
 124   void (*copy)(m_option_t* opt,void* dst, void* src);
 125   // Free the data allocated for a save slot if needed
 126   void (*free)(void* dst);
 127 };
 128
 129 struct m_option {
 130   char *name;
 131   void *p;
 132   m_option_type_t* type;
 133   unsigned int flags;
 134   double min,max;
 135   // This used to be function pointer to hold a 'reverse to defaults' func.
 136   // Nom it can be used to pass any type of extra args.
 137   // Passing a 'default func' is still valid for all func based option types
 138   void* priv; // Type dependent data (for all kind of extended setting)
 139 };
 140
 141
 142 //////////////////////////////// Option flags /////////////////////////////////
 143
 144 // Option flags
 145 #define M_OPT_MIN               (1<<0)
 146 #define M_OPT_MAX               (1<<1)
 147 #define M_OPT_RANGE             (M_OPT_MIN|M_OPT_MAX)
 148 #define M_OPT_NOCFG             (1<<2)
 149 #define M_OPT_NOCMD             (1<<3)
 150 // This option is global : it won't be saved on push and the command
 151 // line parser will set it when it's parsed (ie. it won't be set later)
 152 // e.g options : -v, -quiet
 153 #define M_OPT_GLOBAL            (1<<4)
 154 // Do not save this option : it won't be saved on push but the command
 155 // line parser will put it with it's entry (ie : it may be set later)
 156 // e.g options : -include
 157 #define M_OPT_NOSAVE            (1<<5)
 158 // Emulate old behaviour by pushing the option only if it was set by the user
 159 #define M_OPT_OLD               (1<<6)
 160
 161 // FIXME: backward compatibility
 162 #define CONF_MIN                M_OPT_MIN
 163 #define CONF_MAX                M_OPT_MAX
 164 #define CONF_RANGE              M_OPT_RANGE
 165 #define CONF_NOCFG              M_OPT_NOCFG
 166 #define CONF_NOCMD              M_OPT_NOCMD
 167 #define CONF_GLOBAL             M_OPT_GLOBAL
 168 #define CONF_NOSAVE             M_OPT_NOSAVE
 169 #define CONF_OLD                M_OPT_OLD
 170
 171
 172 ///////////////////////////// Option type flags ///////////////////////////////////
 173
 174 // These flags are for the parsers. The description here apply to the m_config_t
 175 // based parsers (ie. cmd line and config file parsers)
 176 // Some parser will refuse option types that have some of these flags
 177
 178 // This flag is used for the subconfig
 179 // When this flag is set, opt->p should point to another m_option_t array
 180 // Only the parse function will be called. If dst is set, it should create/update
 181 // an array of char* containg opt/val pairs.
 182 // Then the options in the child array will then be set automaticly.
 183 // You can only affect the way suboption are parsed.
 184 // Also note that suboptions may be directly accessed by using -option:subopt blah :-)
 185 #define M_OPT_TYPE_HAS_CHILD            (1<<0)
 186 // If this flag is set the option type support option name with * at the end (used for -aa*)
 187 // This only affect the option name matching, the option type have to implement
 188 // the needed stuff.
 189 #define M_OPT_TYPE_ALLOW_WILDCARD       (1<<1)
 190 // This flag indicate that the data is dynamicly allocated (opt->p point to a pointer)
 191 // It enable a little hack wich replace the initial value by a dynamic copy
 192 // in case the initial value is staticly allocated (pretty common with strings)
 193 #define M_OPT_TYPE_DYNAMIC              (1<<2)
 194 /// If this is set the parse function doesn't directly return
 195 // the wanted thing. Options use this if for some reasons they have to wait
 196 // until the set call to be able to correctly set the target var.
 197 // So for those types you have to first parse and then set the target var
 198 // If this flag isn't set you can parse directly to the target var
 199 // It's used for the callback based option as the callback call may append
 200 // later on.
 201 #define M_OPT_TYPE_INDIRECT             (1<<3)
 202
 203
 204 ///////////////////////////// Parser flags ////////////////////////////////////////
 205
 206 // Config mode : some parser type behave differently depending
 207 // on config->mode value wich is passed in the src param of parse()
 208 #define M_CONFIG_FILE 0
 209 #define M_COMMAND_LINE 1
 210
 211 // Option parser error code
 212 #define M_OPT_UNKNOWN           -1
 213 #define M_OPT_MISSING_PARAM     -2
 214 #define M_OPT_INVALID           -3
 215 #define M_OPT_OUT_OF_RANGE      -4
 216 #define M_OPT_PARSER_ERR        -5
 217 #define M_OPT_EXIT              -6
 218
 219 // FIXME: backward compatibility
 220 #define ERR_NOT_AN_OPTION       M_OPT_UNKNOWN
 221 #define ERR_MISSING_PARAM       M_OPT_MISSING_PARAM
 222 #define ERR_OUT_OF_RANGE        M_OPT_OUT_OF_RANGE
 223 #define ERR_FUNC_ERR            M_OPT_PARSER_ERR
 224
 225 m_option_t* m_option_list_find(m_option_t* list,char* name);
 226
 227 inline static int
 228 m_option_parse(m_option_t* opt,char *name, char *param, void* dst, int src) {
 229   return opt->type->parse(opt,name,param,dst,src);
 230 }
 231
 232 inline static  char*
 233 m_option_print(m_option_t* opt,  void* val_ptr) {
 234   if(opt->type->print)
 235     return opt->type->print(opt,val_ptr);
 236   else
 237     return (char*)-1;
 238 }
 239
 240 inline static  void
 241 m_option_save(m_option_t* opt,void* dst, void* src) {
 242   if(opt->type->save)
 243     opt->type->save(opt,dst,src);
 244 }
 245
 246 inline static  void
 247 m_option_set(m_option_t* opt,void* dst, void* src) {
 248   if(opt->type->set)
 249     opt->type->set(opt,dst,src);
 250 }
 251
 252 inline  static void
 253 m_option_copy(m_option_t* opt,void* dst, void* src) {
 254   if(opt->type->copy)
 255     opt->type->set(opt,dst,src);
 256   else if(opt->type->size > 0)
 257     memcpy(dst,src,opt->type->size);
 258 }
 259
 260 inline static void
 261 m_option_free(m_option_t* opt,void* dst) {
 262   if(opt->type->free)
 263     opt->type->free(dst);
 264 }
 265
 266 #endif /* _M_OPTION_H */