From: anon Date: Mon, 18 Sep 2023 21:28:36 +0000 (+0200) Subject: more ideas X-Git-Url: https://git.xolatile.top/?a=commitdiff_plain;h=6b4c82668086b1d5d244c82362902b7f63fdfeb9;p=public-libhl.git more ideas --- diff --git a/README.md b/README.md index 5e4eb3d..f1e55e3 100644 --- a/README.md +++ b/README.md @@ -9,24 +9,34 @@ These functions are responsible for the library's "life time". `hl_init()` must be called before any other library function. `hl_deinit()` will ensure all occupied memory is freed. + ```C -void render_string(const char * const string, const char * const mode); +void render_string(const char * const string, const char * const mode); //XXX: rename ``` This function matches _string_ against all known highlighting rules and dispatches the appropriate callback depending on _mode_. + ```C #define HLPATH //?! ``` Coma separated list of directories to be searched for syntax scripts. `#undef` to disable it entirely. + ```C typedef void (*attribute_callback_t)(const char * const string, const int length, void * const attributes); ``` -The type used for defining appropriate callbacks for render_string(). +The type used for defining appropriate callbacks for render\_string(). + string - string to be outputed + length - number of characters that matched a highlighting rule + attributes - arbitrary data associated with the matched rule; intended to hold color/font information for example + +```C +struct token_table_t; +``` +Holds a group of tokens belonging to the same language. + + ```C typedef struct { char * key; @@ -35,8 +45,12 @@ typedef struct { ``` The type for defining display modes. - void new_display_mode(display_t * mode); -This is how you append a display mode that render_string() will search based on _.key_. + +```C +void new_display_mode(display_t * mode); +``` +This is how you append a display mode that render\_string() will search based on _.key_. + ```C typedef enum { @@ -57,24 +71,59 @@ These are the valid type of distinct token types. + MATCH - a regular expression to be recognized + REGION - a regular expression where the starting and ending patters are to be distinguished from the contents + The universal way to add a new pattern to be recognized is with: ```C token * new_token(const char * const syntax, const token_type_t t, const hl_group_t * const g); ``` + + There are also convinience functions: ```C // NOTE: the return value is the number tokens successfully inserted int new_keyword_tokens(const char * const * words, hl_group_t * const g); // _words_ must be NULL terminated int new_syntax_character_tokens(const char * const chars, hl_group_t * const g); ``` -The regex engine used for MATCHes is Jeger by default, emulating Vim regex. + + +The regex engine used for MATCH-es is Jeger by default, emulating Vim regex. However the regex engine can be overridden: ```C // ?! ``` + +### Default +There are default of most anything defined for convenience. They can be disable with `#undef`-ing the following macro: +```C +#define HL_DEFAULTS +``` + +```C +hl_group_t * normal_hl +hl_group_t * error_hl +hl_group_t * warning_hl +hl_group_t * search_hl + +hl_group_t * underlined_hl +hl_group_t * bold_hl +hl_group_t * italics_hl + +hl_group_t * comment_hl +hl_group_t * block_hl +hl_group_t * operator_hl +hl_group_t * constant_hl +hl_group_t * special_hl +hl_group_t * identifier_hl +hl_group_t * type_hl + +// --- +token_table_t std_token_table; +``` + --- + # hl General purpose highlighter (and demo program for libhl).