Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 130 insertions, 0 deletions

diff --git a/color.h b/color.h
new file mode 100644
index 000000000000..98894d6a1756
--- /dev/null
+++ b/color.h
@@ -0,0 +1,130 @@
+#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_FAINT_RED	"\033[2;31m"
+#define GIT_COLOR_FAINT_GREEN	"\033[2;32m"
+#define GIT_COLOR_FAINT_YELLOW	"\033[2;33m"
+#define GIT_COLOR_FAINT_BLUE	"\033[2;34m"
+#define GIT_COLOR_FAINT_MAGENTA	"\033[2;35m"
+#define GIT_COLOR_FAINT_CYAN	"\033[2;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"
+#define GIT_COLOR_REVERSE	"\033[7m"
+
+/* 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_fd(int fd, int var);
+#define want_color(colorbool) want_color_fd(1, (colorbool))
+#define want_color_stderr(colorbool) want_color_fd(2, (colorbool))
+
+/*
+ * 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 */