1 files changed, 92 insertions, 0 deletions
diff --git a/src/buffer.h b/src/buffer.h
index 8c2096bce..e75ecc15c 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -17,6 +17,21 @@
  * } git_buf;
  */
 
+typedef enum {
+	GIT_BOM_NONE = 0,
+	GIT_BOM_UTF8 = 1,
+	GIT_BOM_UTF16_LE = 2,
+	GIT_BOM_UTF16_BE = 3,
+	GIT_BOM_UTF32_LE = 4,
+	GIT_BOM_UTF32_BE = 5
+} git_bom_t;
+
+typedef struct {
+	git_bom_t bom; /* BOM found at head of text */
+	unsigned int nul, cr, lf, crlf; /* NUL, CR, LF and CRLF counts */
+	unsigned int printable, nonprintable; /* These are just approximations! */
+} git_buf_text_stats;
+
 extern char git_buf__initbuf[];
 extern char git_buf__oom[];
 
@@ -219,4 +234,81 @@ int git_buf_splice(
 	const char *data,
 	size_t nb_to_insert);
 
+/**
+ * Append string to buffer, prefixing each character from `esc_chars` with
+ * `esc_with` string.
+ *
+ * @param buf Buffer to append data to
+ * @param string String to escape and append
+ * @param esc_chars Characters to be escaped
+ * @param esc_with String to insert in from of each found character
+ * @return 0 on success, <0 on failure (probably allocation problem)
+ */
+extern int git_buf_puts_escaped(
+	git_buf *buf,
+	const char *string,
+	const char *esc_chars,
+	const char *esc_with);
+
+/**
+ * Append string escaping characters that are regex special
+ */
+GIT_INLINE(int) git_buf_puts_escape_regex(git_buf *buf, const char *string)
+{
+	return git_buf_puts_escaped(buf, string, "^.[]$()|*+?{}\\", "\\");
+}
+
+/**
+ * Unescape all characters in a buffer in place
+ *
+ * I.e. remove backslashes
+ */
+extern void git_buf_unescape(git_buf *buf);
+
+/**
+ * Replace all \r\n with \n.
+ *
+ * @return 0 on success, -1 on memory error
+ */
+extern int git_buf_crlf_to_lf(git_buf *tgt, const git_buf *src);
+
+/**
+ * Replace all \n with \r\n. Does not modify existing \r\n.
+ *
+ * @return 0 on success, -1 on memory error
+ */
+extern int git_buf_lf_to_crlf(git_buf *tgt, const git_buf *src);
+
+/**
+ * Fill buffer with the common prefix of a array of strings
+ *
+ * Buffer will be set to empty if there is no common prefix
+ */
+extern int git_buf_common_prefix(git_buf *buf, const git_strarray *strs);
+
+/**
+ * Check if a buffer begins with a UTF BOM
+ *
+ * @param bom Set to the type of BOM detected or GIT_BOM_NONE
+ * @param buf Buffer in which to check the first bytes for a BOM
+ * @return Number of bytes of BOM data (or 0 if no BOM found)
+ */
+extern int git_buf_detect_bom(git_bom_t *bom, const git_buf *buf);
+
+/**
+ * Gather stats for a piece of text
+ *
+ * Fill the `stats` structure with counts of unreadable characters, carriage
+ * returns, etc, so it can be used in heuristics.  This automatically skips
+ * a trailing EOF (\032 character).  Also it will look for a BOM at the
+ * start of the text and can be told to skip that as well.
+ *
+ * @param stats Structure to be filled in
+ * @param buf Text to process
+ * @param skip_bom Exclude leading BOM from stats if true
+ * @return Does the buffer heuristically look like binary data
+ */
+extern bool git_buf_gather_text_stats(
+	git_buf_text_stats *stats, const git_buf *buf, bool skip_bom);
+
 #endif