--- /dev/null
+Callouts API Version 6.8.2 2018/04/10
+
+#include <oniguruma.h>
+
+
+(1) Callouts function type
+
+ typedef int (*OnigCalloutFunc)(OnigCalloutArgs* args, void* user_data);
+
+ If 0 (NULL) is set as a callout function value, never called.
+
+
+ * callouts function return value (int)
+
+ ONIG_CALLOUT_FAIL(1): fail
+ ONIG_CALLOUT_SUCCESS(0): success
+ less than -1: error code (terminate search/match)
+
+ ONIG_CALLOUT_FAIL/SUCCESS values are ignored in retraction,
+ because retraction is a recovery process after failure.
+
+
+
+(2) Set/Get a function for Callouts of contents
+
+# OnigCalloutFunc onig_get_progress_callout(void)
+
+ Get a function for callouts of contents in progress.
+
+
+# int onig_set_progress_callout(OnigCalloutFunc f)
+
+ Set a function for callouts of contents in progress.
+ This value set in onig_initialize_match_param() as default callout function.
+
+ normal return: ONIG_NORMAL
+
+
+# OnigCalloutFunc onig_get_retraction_callout(void)
+
+ Get a function for callouts of contents in retraction (backtrack).
+
+
+# int onig_set_retraction_callout(OnigCalloutFunc f)
+
+ Set a function for callouts of contents in retraction (backtrack).
+ This value set in onig_initialize_match_param() as default callout function.
+
+ normal return: ONIG_NORMAL
+
+
+# int onig_set_progress_callout_of_match_param(OnigMatchParam* mp, OnigCalloutFunc f)
+
+ Set a function for callouts of contents in progress.
+
+ arguments
+ 1 mp: match-param pointer
+ 2 f: function
+
+ normal return: ONIG_NORMAL
+
+
+# int onig_set_retraction_callout_of_match_param(OnigMatchParam* mp, OnigCalloutFunc f)
+
+ Set a function for callouts of contents in retraction (backtrack).
+
+ arguments
+ 1 mp: match-param pointer
+ 2 f: function
+
+ normal return: ONIG_NORMAL
+
+
+
+(3) Set a function for Callouts of name
+
+# int onig_set_callout_of_name(OnigEncoding enc, OnigCalloutType type, OnigUChar* name, OnigUChar* name_end, int callout_in, OnigCalloutFunc callout, OnigCalloutFunc end_callout, int arg_num, unsigned int arg_types[], int optional_arg_num, OnigValue opt_defaults[])
+
+ Set a function for callouts of name.
+ Allowed name string characters: _ A-Z a-z 0-9 (* first character: _ A-Z a-z)
+
+ (enc, name) pair is used as key value to find callout function.
+ You have to call this function for every encoding which used in your applications.
+ But if enc is ASCII compatible and (enc, name) entry is not found,
+ then (ASCII, name) entry is used.
+ Therefore, if you use ASCI compatible encodings only, it is enough to call
+ this function one time for (ASCII, name).
+
+ arguments
+ 1 enc: character encoding
+ 2 type: callout type (currently ONIG_CALLOUT_TYPE_SINGLE only supported)
+ 3 name: name string pointer (the string is encoded by enc)
+ 4 name_end: name string end pointer
+ 5 callout_in: direction flag (ONIG_CALLOUT_IN_PROGRESS/RETRACTION/BOTH)
+ 6 callout: callout function
+ 7 end_callout: * not used currently (set 0)
+ 8 arg_num: number of arguments (*limit by ONIG_CALLOUT_MAX_ARGS_NUM == 4)
+ 9 arg_types: type array of arguments
+ 10 optional_arg_num: number of optional arguments
+ 11 opt_defaults: option values array of arguments
+
+ normal return: ONIG_NORMAL
+ error:
+ ONIGERR_INVALID_CALLOUT_NAME
+ ONIGERR_INVALID_ARGUMENT
+ ONIGERR_INVALID_CALLOUT_ARG
+
+
+
+(4) User data
+
+# int onig_set_callout_user_data_of_match_param(OnigMatchParam* param, void* user_data)
+
+ Set a user_data value which passed as a argument of callout for both of progress and retractions.
+
+ normal return: ONIG_NORMAL
+
+
+
+(5) Get values from OnigCalloutArgs
+
+# int onig_get_callout_num_by_callout_args(OnigCalloutArgs* args)
+
+ Return callout number of this callout.
+ Callout number is an identifier of callout in the regex pattern.
+
+
+# OnigCalloutIn onig_get_callout_in_by_callout_args(OnigCalloutArgs* args)
+
+ Return the direction of this callout.
+ (ONIG_CALLOUT_IN_PROGRESS or ONIG_CALLOUT_IN_RETRACTION)
+
+
+# int onig_get_name_id_by_callout_args(OnigCalloutArgs* args)
+
+ Return the name identiifer of this callout.
+ If this callout is callout of contents, then return ONIG_NON_NAME_ID.
+
+
+# const OnigUChar* onig_get_contents_by_callout_args(OnigCalloutArgs* args)
+
+ Return the contents of this callout.
+ If this callout is callout of name, then return NULL.
+
+
+# const OnigUChar* onig_get_contents_end_by_callout_args(OnigCalloutArgs* args)
+
+ Return the end of contents of this callout.
+ If this callout is callout of name, then return NULL.
+
+
+# int onig_get_args_num_by_callout_args(OnigCalloutArgs* args)
+
+ Return the number of args of this callout.
+ It includes optional arguments that doesn't passed in regex pattern.
+ If this callout is callout of contents, then return ONIGERR_INVALID_ARGUMENT.
+
+
+# int onig_get_passed_args_num_by_callout_args(OnigCalloutArgs* args)
+
+ Return the number of args that passed really in regex pattern.
+ If this callout is callout of contents, then return ONIGERR_INVALID_ARGUMENT.
+
+
+# int onig_get_arg_by_callout_args(OnigCalloutArgs* args, int index, OnigType* type, OnigValue* val)
+
+ Return a value and a type of the callout argument.
+ If this callout is callout of contents, then return ONIGERR_INVALID_ARGUMENT.
+
+ normal return: ONIG_NORMAL
+
+
+# const OnigUChar* onig_get_string_by_callout_args(OnigCalloutArgs* args)
+
+ Return the subject string adress.
+ This is the second argument(str) of onig_search().
+
+
+# const OnigUChar* onig_get_string_end_by_callout_args(OnigCalloutArgs* args)
+
+ Return the end address of subject string.
+ This is the third argument(end) of onig_search().
+
+
+# const OnigUChar* onig_get_start_by_callout_args(OnigCalloutArgs* args)
+
+ Return the start address of subject string in current match process.
+
+
+# const OnigUChar* onig_get_right_range_by_callout_args(OnigCalloutArgs* args)
+
+ Return the right range address of subject string.
+
+
+# const OnigUChar* onig_get_current_by_callout_args(OnigCalloutArgs* args)
+
+ Return the current address of subject string in current match process.
+
+
+# OnigRegex onig_get_regex_by_callout_args(OnigCalloutArgs* args)
+
+ Return the regex object address of this callout.
+
+
+# unsigned long onig_get_retry_counter_by_callout_args(OnigCalloutArgs* args)
+
+ Return the current counter value for retry-limit-in-match.
+
+
+
+(6) Tag
+
+ "Tag" is a name which assigned to a callout in regexp pattern.
+ Allowed tag string characters: _ A-Z a-z 0-9 (* first character: _ A-Z a-z)
+
+
+# int onig_callout_tag_is_exist_at_callout_num(OnigRegex reg, int callout_num)
+
+ Return 1 if tag is assigned for the callout, else return 0.
+
+
+# const OnigUChar* onig_get_callout_tag_start(OnigRegex reg, int callout_num)
+
+ Return the start address of tag string for the callout.
+
+
+# const OnigUChar* onig_get_callout_tag_end(OnigRegex reg, int callout_num)
+
+ Return the end address of tag string for the callout.
+
+
+# int onig_get_callout_num_by_tag(OnigRegex reg, const OnigUChar* tag, const OnigUChar* tag_end)
+
+ Return the callout number for the tag.
+
+
+
+(7) Access to callout data
+
+ "Callout data" is ONIG_CALLOUT_DATA_SLOT_NUM(5) values area
+ for each callout in each search process.
+ Each value area in the callout is indicated by "slot" number (0 - 4).
+
+
+# int onig_get_callout_data_dont_clear_old(OnigRegex reg, OnigMatchParam* mp, int callout_num, int slot, OnigType* type, OnigValue* val)
+# int onig_get_callout_data_by_callout_args_self_dont_clear_old(OnigCalloutArgs* args, int slot, OnigType* type, OnigValue* val)
+# int onig_get_callout_data(OnigRegex reg, OnigMatchParam* mp, int callout_num, int slot, OnigType* type, OnigValue* val)
+# int onig_get_callout_data_by_callout_args(OnigCalloutArgs* args, int callout_num, int slot, OnigType* type, OnigValue* val)
+# int onig_get_callout_data_by_callout_args_self(OnigCalloutArgs* args, int slot, OnigType* type, OnigValue* val)
+# int onig_set_callout_data(OnigRegex reg, OnigMatchParam* mp, int callout_num, int slot, OnigType type, OnigValue* val)
+# int onig_set_callout_data_by_callout_args(OnigCalloutArgs* args, int callout_num, int slot, OnigType type, OnigValue* val)
+# int onig_set_callout_data_by_callout_args_self(OnigCalloutArgs* args, int slot, OnigType type, OnigValue* val)
+# int onig_get_callout_data_by_tag(OnigRegex reg, OnigMatchParam* mp, const OnigUChar* tag, const OnigUChar* tag_end, int slot, OnigType* type, OnigValue* val)
+# int onig_set_callout_data_by_tag(OnigRegex reg, OnigMatchParam* mp, const OnigUChar* tag, const OnigUChar* tag_end, int slot, OnigType type, OnigValue* val)
+
+
+
+(8) Miscellaneous functions
+
+# OnigUChar* onig_get_callout_name_by_name_id(int id)
+# int onig_get_capture_range_in_callout(OnigCalloutArgs* args, int mem_num, int* begin, int* end)
+# int onig_get_used_stack_size_in_callout(OnigCalloutArgs* args, int* used_num, int* used_bytes)
+
+//END
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