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Adds SetDefault methods to NetworkTables (#54)

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There was no way to atomically check for a key in the table,
and then setting if it if non existant. Back before persistent
this was not a problem, however now it is, as its possible for
values to be added before team's robot programs start. This makes
the old method of calling Put*** methods in RobotInit invalid.
This adds SetDefault methods, which do this atomically.
This commit is contained in:
Thad House
2016-07-13 00:31:03 -07:00
committed by Peter Johnson
parent 6615a34e99
commit 58092c5190
15 changed files with 785 additions and 1 deletions
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114
include/ntcore_c.h
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@@ -174,6 +174,19 @@ struct NT_RpcCallInfo {
*/
void NT_GetEntryValue(const char *name, size_t name_len,
struct NT_Value *value);
/** Set Default Entry Value.
* Returns copy of current entry value if it exists.
* Otherwise, sets passed in value, and returns set value.
* Note that one of the type options is "unassigned".
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_value value to be set if name does not exist
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryValue(const char* name, size_t name_len,
const struct NT_Value *default_value);
/** Set Entry Value.
* Sets new entry value. If type of new value differs from the type of the
@@ -802,6 +815,107 @@ NT_String *NT_GetEntryStringArray(const char *name, size_t name_len,
unsigned long long *last_change,
size_t *arr_size);
/* Set Default Values */
/** Set Default Entry Boolean.
* Sets the default for the specified key to be a boolean.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_boolean value to be set if name does not exist
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryBoolean(const char *name, size_t name_len,
int default_boolean);
/** Set Default Entry Double.
* Sets the default for the specified key.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_double value to be set if name does not exist
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryDouble(const char *name, size_t name_len,
double default_double);
/** Set Default Entry String.
* Sets the default for the specified key.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_value value to be set if name does not exist
* @param default_len length of value
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryString(const char *name, size_t name_len,
const char *default_value, size_t default_len);
/** Set Default Entry Raw.
* Sets the default for the specified key.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_value value to be set if name does not exist
* @param default_len length of value array
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryRaw(const char *name, size_t name_len,
const char *default_value, size_t default_len);
/** Set Default Entry Boolean Array.
* Sets the default for the specified key.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_value value to be set if name does not exist
* @param default_size size of value array
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryBooleanArray(const char *name, size_t name_len,
const int *default_value,
size_t default_size);
/** Set Default Entry Double Array.
* Sets the default for the specified key.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_value value to be set if name does not exist
* @param default_size size of value array
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryDoubleArray(const char *name, size_t name_len,
const double *default_value,
size_t default_size);
/** Set Default Entry String Array.
* Sets the default for the specified key.
* If key exists with same type, does not set value. Otherwise
* sets value to the default.
*
* @param name entry name (UTF-8 string)
* @param name_len length of name in bytes
* @param default_value value to be set if name does not exist
* @param default_size size of value array
* @return 0 on error (value not set), 1 on success
*/
int NT_SetDefaultEntryStringArray(const char *name, size_t name_len,
const struct NT_String* default_value,
size_t default_size);
/* Entry Value Setters */
/** Set Entry Boolean