color.h - git - Git at Google

 #ifndef COLOR_H
 #define COLOR_H

 struct strbuf;

 /*
  * The maximum length of ANSI color sequence we would generate:
  * - leading ESC '['            2
  * - attr + ';'                 2 * num_attr (e.g. "1;")
  * - no-attr + ';'              3 * num_attr (e.g. "22;")
  * - fg color + ';'             17 (e.g. "38;2;255;255;255;")
  * - bg color + ';'             17 (e.g. "48;2;255;255;255;")
  * - terminating 'm' NUL        2
  *
  * The above overcounts by one semicolon but it is close enough.
  *
  * The space for attributes is also slightly overallocated, as
  * the negation for some attributes is the same (e.g., nobold and nodim).
  *
  * We allocate space for 7 attributes.
  */
 #define COLOR_MAXLEN 75

 #define GIT_COLOR_NORMAL	""
 #define GIT_COLOR_RESET		"\033[m"
 #define GIT_COLOR_BOLD		"\033[1m"
 #define GIT_COLOR_RED		"\033[31m"
 #define GIT_COLOR_GREEN		"\033[32m"
 #define GIT_COLOR_YELLOW	"\033[33m"
 #define GIT_COLOR_BLUE		"\033[34m"
 #define GIT_COLOR_MAGENTA	"\033[35m"
 #define GIT_COLOR_CYAN		"\033[36m"
 #define GIT_COLOR_BOLD_RED	"\033[1;31m"
 #define GIT_COLOR_BOLD_GREEN	"\033[1;32m"
 #define GIT_COLOR_BOLD_YELLOW	"\033[1;33m"
 #define GIT_COLOR_BOLD_BLUE	"\033[1;34m"
 #define GIT_COLOR_BOLD_MAGENTA	"\033[1;35m"
 #define GIT_COLOR_BOLD_CYAN	"\033[1;36m"
 #define GIT_COLOR_BG_RED	"\033[41m"
 #define GIT_COLOR_BG_GREEN	"\033[42m"
 #define GIT_COLOR_BG_YELLOW	"\033[43m"
 #define GIT_COLOR_BG_BLUE	"\033[44m"
 #define GIT_COLOR_BG_MAGENTA	"\033[45m"
 #define GIT_COLOR_BG_CYAN	"\033[46m"
 #define GIT_COLOR_FAINT		"\033[2m"
 #define GIT_COLOR_FAINT_ITALIC	"\033[2;3m"

 /* A special value meaning "no color selected" */
 #define GIT_COLOR_NIL "NIL"

 /*
  * The first three are chosen to match common usage in the code, and what is
  * returned from git_config_colorbool. The "auto" value can be returned from
  * config_colorbool, and will be converted by want_color() into either 0 or 1.
  */
 #define GIT_COLOR_UNKNOWN -1
 #define GIT_COLOR_NEVER  0
 #define GIT_COLOR_ALWAYS 1
 #define GIT_COLOR_AUTO   2

 /* A default list of colors to use for commit graphs and show-branch output */
 extern const char *column_colors_ansi[];
 extern const int column_colors_ansi_max;

 /*
  * Generally the color code will lazily figure this out itself, but
  * this provides a mechanism for callers to override autodetection.
  */
 extern int color_stdout_is_tty;

 /*
  * Use the first one if you need only color config; the second is a convenience
  * if you are just going to change to git_default_config, too.
  */
 int git_color_config(const char *var, const char *value, void *cb);
 int git_color_default_config(const char *var, const char *value, void *cb);

 /*
  * Parse a config option, which can be a boolean or one of
  * "never", "auto", "always". Return a constant of
  * GIT_COLOR_NEVER for "never" or negative boolean,
  * GIT_COLOR_ALWAYS for "always" or a positive boolean,
  * and GIT_COLOR_AUTO for "auto".
  */
 int git_config_colorbool(const char *var, const char *value);

 /*
  * Return a boolean whether to use color, where the argument 'var' is
  * one of GIT_COLOR_UNKNOWN, GIT_COLOR_NEVER, GIT_COLOR_ALWAYS, GIT_COLOR_AUTO.
  */
 int want_color(int var);

 /*
  * Translate a Git color from 'value' into a string that the terminal can
  * interpret and store it into 'dst'. The Git color values are of the form
  * "foreground [background] [attr]" where fore- and background can be a color
  * name ("red"), a RGB code (#0xFF0000) or a 256-color-mode from the terminal.
  */
 int color_parse(const char *value, char *dst);
 int color_parse_mem(const char *value, int len, char *dst);

 /*
  * Output the formatted string in the specified color (and then reset to normal
  * color so subsequent output is uncolored). Omits the color encapsulation if
  * `color` is NULL. The `color_fprintf_ln` prints a new line after resetting
  * the color.  The `color_print_strbuf` prints the contents of the given
  * strbuf (BUG: but only up to its first NUL character).
  */
 __attribute__((format (printf, 3, 4)))
 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
 __attribute__((format (printf, 3, 4)))
 int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
 void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb);

 /*
  * Check if the given color is GIT_COLOR_NIL that means "no color selected".
  * The caller needs to replace the color with the actual desired color.
  */
 int color_is_nil(const char *color);

 #endif /* COLOR_H */
	#ifndef COLOR_H
	#define COLOR_H

	struct strbuf;

	/*
	* The maximum length of ANSI color sequence we would generate:
	* - leading ESC '[' 2
	* - attr + ';' 2 * num_attr (e.g. "1;")
	* - no-attr + ';' 3 * num_attr (e.g. "22;")
	* - fg color + ';' 17 (e.g. "38;2;255;255;255;")
	* - bg color + ';' 17 (e.g. "48;2;255;255;255;")
	* - terminating 'm' NUL 2
	*
	* The above overcounts by one semicolon but it is close enough.
	*
	* The space for attributes is also slightly overallocated, as
	* the negation for some attributes is the same (e.g., nobold and nodim).
	*
	* We allocate space for 7 attributes.
	*/
	#define COLOR_MAXLEN 75

	#define GIT_COLOR_NORMAL ""
	#define GIT_COLOR_RESET "\033[m"
	#define GIT_COLOR_BOLD "\033[1m"
	#define GIT_COLOR_RED "\033[31m"
	#define GIT_COLOR_GREEN "\033[32m"
	#define GIT_COLOR_YELLOW "\033[33m"
	#define GIT_COLOR_BLUE "\033[34m"
	#define GIT_COLOR_MAGENTA "\033[35m"
	#define GIT_COLOR_CYAN "\033[36m"
	#define GIT_COLOR_BOLD_RED "\033[1;31m"
	#define GIT_COLOR_BOLD_GREEN "\033[1;32m"
	#define GIT_COLOR_BOLD_YELLOW "\033[1;33m"
	#define GIT_COLOR_BOLD_BLUE "\033[1;34m"
	#define GIT_COLOR_BOLD_MAGENTA "\033[1;35m"
	#define GIT_COLOR_BOLD_CYAN "\033[1;36m"
	#define GIT_COLOR_BG_RED "\033[41m"
	#define GIT_COLOR_BG_GREEN "\033[42m"
	#define GIT_COLOR_BG_YELLOW "\033[43m"
	#define GIT_COLOR_BG_BLUE "\033[44m"
	#define GIT_COLOR_BG_MAGENTA "\033[45m"
	#define GIT_COLOR_BG_CYAN "\033[46m"
	#define GIT_COLOR_FAINT "\033[2m"
	#define GIT_COLOR_FAINT_ITALIC "\033[2;3m"

	/* A special value meaning "no color selected" */
	#define GIT_COLOR_NIL "NIL"

	/*
	* The first three are chosen to match common usage in the code, and what is
	* returned from git_config_colorbool. The "auto" value can be returned from
	* config_colorbool, and will be converted by want_color() into either 0 or 1.
	*/
	#define GIT_COLOR_UNKNOWN -1
	#define GIT_COLOR_NEVER 0
	#define GIT_COLOR_ALWAYS 1
	#define GIT_COLOR_AUTO 2

	/* A default list of colors to use for commit graphs and show-branch output */
	extern const char *column_colors_ansi[];
	extern const int column_colors_ansi_max;

	/*
	* Generally the color code will lazily figure this out itself, but
	* this provides a mechanism for callers to override autodetection.
	*/
	extern int color_stdout_is_tty;

	/*
	* Use the first one if you need only color config; the second is a convenience
	* if you are just going to change to git_default_config, too.
	*/
	int git_color_config(const char var, const char value, void *cb);
	int git_color_default_config(const char var, const char value, void *cb);

	/*
	* Parse a config option, which can be a boolean or one of
	* "never", "auto", "always". Return a constant of
	* GIT_COLOR_NEVER for "never" or negative boolean,
	* GIT_COLOR_ALWAYS for "always" or a positive boolean,
	* and GIT_COLOR_AUTO for "auto".
	*/
	int git_config_colorbool(const char var, const char value);

	/*
	* Return a boolean whether to use color, where the argument 'var' is
	* one of GIT_COLOR_UNKNOWN, GIT_COLOR_NEVER, GIT_COLOR_ALWAYS, GIT_COLOR_AUTO.
	*/
	int want_color(int var);

	/*
	* Translate a Git color from 'value' into a string that the terminal can
	* interpret and store it into 'dst'. The Git color values are of the form
	* "foreground [background] [attr]" where fore- and background can be a color
	* name ("red"), a RGB code (#0xFF0000) or a 256-color-mode from the terminal.
	*/
	int color_parse(const char value, char dst);
	int color_parse_mem(const char value, int len, char dst);

	/*
	* Output the formatted string in the specified color (and then reset to normal
	* color so subsequent output is uncolored). Omits the color encapsulation if
	* `color` is NULL. The `color_fprintf_ln` prints a new line after resetting
	* the color. The `color_print_strbuf` prints the contents of the given
	* strbuf (BUG: but only up to its first NUL character).
	*/
	__attribute__((format (printf, 3, 4)))
	int color_fprintf(FILE fp, const char color, const char *fmt, ...);
	__attribute__((format (printf, 3, 4)))
	int color_fprintf_ln(FILE fp, const char color, const char *fmt, ...);
	void color_print_strbuf(FILE fp, const char color, const struct strbuf *sb);

	/*
	* Check if the given color is GIT_COLOR_NIL that means "no color selected".
	* The caller needs to replace the color with the actual desired color.
	*/
	int color_is_nil(const char *color);

	#endif /* COLOR_H */