buf: bom enum is in the buf namespace

Instead of a `git_bom_t` that a `git_buf` function returns, let's keep
it `git_buf_bom_t`.

src/attr_file.c

@@ -122,7 +122,7 @@ int git_attr_file__load(
 	struct stat st;
 	bool nonexistent = false;
 	int bom_offset;
-	git_bom_t bom;
+	git_buf_bom_t bom;
 	git_oid id;
 	git_object_size_t blobsize;
 
@@ -193,7 +193,7 @@ int git_attr_file__load(
 	content_str = git_buf_cstr(&content);
 	bom_offset = git_buf_detect_bom(&bom, &content);
 
-	if (bom == GIT_BOM_UTF8)
+	if (bom == GIT_BUF_BOM_UTF8)
 		content_str += bom_offset;
 
 	/* store the key of the attr_reader; don't bother with cache

src/buffer.c

@@ -1227,12 +1227,12 @@ int git_buf_common_prefix(git_buf *buf, const git_strarray *strings)
 int git_buf_is_binary(const git_buf *buf)
 {
 	const char *scan = buf->ptr, *end = buf->ptr + buf->size;
-	git_bom_t bom;
+	git_buf_bom_t bom;
 	int printable = 0, nonprintable = 0;
 
 	scan += git_buf_detect_bom(&bom, buf);
 
-	if (bom > GIT_BOM_UTF8)
+	if (bom > GIT_BUF_BOM_UTF8)
 		return 1;
 
 	while (scan < end) {
@@ -1257,12 +1257,12 @@ int git_buf_contains_nul(const git_buf *buf)
 	return (memchr(buf->ptr, '\0', buf->size) != NULL);
 }
 
-int git_buf_detect_bom(git_bom_t *bom, const git_buf *buf)
+int git_buf_detect_bom(git_buf_bom_t *bom, const git_buf *buf)
 {
 	const char *ptr;
 	size_t len;
 
-	*bom = GIT_BOM_NONE;
+	*bom = GIT_BUF_BOM_NONE;
 	/* need at least 2 bytes to look for any BOM */
 	if (buf->size < 2)
 		return 0;
@@ -1273,19 +1273,19 @@ int git_buf_detect_bom(git_bom_t *bom, const git_buf *buf)
 	switch (*ptr++) {
 	case 0:
 		if (len >= 4 && ptr[0] == 0 && ptr[1] == '\xFE' && ptr[2] == '\xFF') {
-			*bom = GIT_BOM_UTF32_BE;
+			*bom = GIT_BUF_BOM_UTF32_BE;
 			return 4;
 		}
 		break;
 	case '\xEF':
 		if (len >= 3 && ptr[0] == '\xBB' && ptr[1] == '\xBF') {
-			*bom = GIT_BOM_UTF8;
+			*bom = GIT_BUF_BOM_UTF8;
 			return 3;
 		}
 		break;
 	case '\xFE':
 		if (*ptr == '\xFF') {
-			*bom = GIT_BOM_UTF16_BE;
+			*bom = GIT_BUF_BOM_UTF16_BE;
 			return 2;
 		}
 		break;
@@ -1293,10 +1293,10 @@ int git_buf_detect_bom(git_bom_t *bom, const git_buf *buf)
 		if (*ptr != '\xFE')
 			break;
 		if (len >= 4 && ptr[1] == 0 && ptr[2] == 0) {
-			*bom = GIT_BOM_UTF32_LE;
+			*bom = GIT_BUF_BOM_UTF32_LE;
 			return 4;
 		} else {
-			*bom = GIT_BOM_UTF16_LE;
+			*bom = GIT_BUF_BOM_UTF16_LE;
 			return 2;
 		}
 		break;

src/buffer.h

@@ -18,16 +18,16 @@
  */
 
 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;
+	GIT_BUF_BOM_NONE = 0,
+	GIT_BUF_BOM_UTF8 = 1,
+	GIT_BUF_BOM_UTF16_LE = 2,
+	GIT_BUF_BOM_UTF16_BE = 3,
+	GIT_BUF_BOM_UTF32_LE = 4,
+	GIT_BUF_BOM_UTF32_BE = 5
+} git_buf_bom_t;
 
 typedef struct {
-	git_bom_t bom; /* BOM found at head of text */
+	git_buf_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;
@@ -293,7 +293,7 @@ extern int git_buf_common_prefix(git_buf *buf, const git_strarray *strs);
  * @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);
+extern int git_buf_detect_bom(git_buf_bom_t *bom, const git_buf *buf);
 
 /**
  * Gather stats for a piece of text

src/config_parse.c

@@ -228,10 +228,10 @@ fail_parse:
 static int skip_bom(git_parse_ctx *parser)
 {
 	git_buf buf = GIT_BUF_INIT_CONST(parser->content, parser->content_len);
-	git_bom_t bom;
+	git_buf_bom_t bom;
 	int bom_offset = git_buf_detect_bom(&bom, &buf);
 
-	if (bom == GIT_BOM_UTF8)
+	if (bom == GIT_BUF_BOM_UTF8)
 		git_parse_advance_chars(parser, bom_offset);
 
 	/* TODO: reference implementation is pretty stupid with BoM */

tests/object/blob/filter.c

@@ -43,9 +43,9 @@ static git_buf_text_stats g_crlf_filtered_stats[CRLF_NUM_TEST_OBJECTS] = {
 	{ 0, 0, 2, 2, 2, 6, 0 },
 	{ 0, 0, 4, 4, 1, 31, 0 },
 	{ 0, 1, 1, 2, 1, 9, 5 },
-	{ GIT_BOM_UTF8, 0, 0, 1, 0, 16, 0 },
-	{ GIT_BOM_UTF8, 0, 2, 2, 2, 27, 0 },
-	{ GIT_BOM_UTF16_BE, 5, 0, 0, 0, 7, 5 },
+	{ GIT_BUF_BOM_UTF8, 0, 0, 1, 0, 16, 0 },
+	{ GIT_BUF_BOM_UTF8, 0, 2, 2, 2, 27, 0 },
+	{ GIT_BUF_BOM_UTF16_BE, 5, 0, 0, 0, 7, 5 },
 };
 
 void test_object_blob_filter__initialize(void)