merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/convert.h

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2011, Google Inc.
+ */
+#ifndef CONVERT_H
+#define CONVERT_H
+
+#include "string-list.h"
+
+struct index_state;
+struct object_id;
+struct strbuf;
+
+#define CONV_EOL_RNDTRP_DIE   (1<<0) /* Die if CRLF to LF to CRLF is different */
+#define CONV_EOL_RNDTRP_WARN  (1<<1) /* Warn if CRLF to LF to CRLF is different */
+#define CONV_EOL_RENORMALIZE  (1<<2) /* Convert CRLF to LF */
+#define CONV_EOL_KEEP_CRLF    (1<<3) /* Keep CRLF line endings as is */
+#define CONV_WRITE_OBJECT     (1<<4) /* Content is written to the index */
+
+extern int global_conv_flags_eol;
+
+enum auto_crlf {
+	AUTO_CRLF_FALSE = 0,
+	AUTO_CRLF_TRUE = 1,
+	AUTO_CRLF_INPUT = -1
+};
+
+extern enum auto_crlf auto_crlf;
+
+enum eol {
+	EOL_UNSET,
+	EOL_CRLF,
+	EOL_LF,
+#ifdef NATIVE_CRLF
+	EOL_NATIVE = EOL_CRLF
+#else
+	EOL_NATIVE = EOL_LF
+#endif
+};
+
+enum ce_delay_state {
+	CE_NO_DELAY = 0,
+	CE_CAN_DELAY = 1,
+	CE_RETRY = 2
+};
+
+struct delayed_checkout {
+	/*
+	 * State of the currently processed cache entry. If the state is
+	 * CE_CAN_DELAY, then the filter can delay the current cache entry.
+	 * If the state is CE_RETRY, then this signals the filter that the
+	 * cache entry was requested before.
+	 */
+	enum ce_delay_state state;
+	/* List of filter drivers that signaled delayed blobs. */
+	struct string_list filters;
+	/* List of delayed blobs identified by their path. */
+	struct string_list paths;
+};
+
+extern enum eol core_eol;
+extern char *check_roundtrip_encoding;
+const char *get_cached_convert_stats_ascii(const struct index_state *istate,
+					   const char *path);
+const char *get_wt_convert_stats_ascii(const char *path);
+const char *get_convert_attr_ascii(const struct index_state *istate,
+				   const char *path);
+
+/* returns 1 if *dst was used */
+int convert_to_git(const struct index_state *istate,
+		   const char *path, const char *src, size_t len,
+		   struct strbuf *dst, int conv_flags);
+int convert_to_working_tree(const struct index_state *istate,
+			    const char *path, const char *src,
+			    size_t len, struct strbuf *dst);
+int async_convert_to_working_tree(const struct index_state *istate,
+				  const char *path, const char *src,
+				  size_t len, struct strbuf *dst,
+				  void *dco);
+int async_query_available_blobs(const char *cmd,
+				struct string_list *available_paths);
+int renormalize_buffer(const struct index_state *istate,
+		       const char *path, const char *src, size_t len,
+		       struct strbuf *dst);
+static inline int would_convert_to_git(const struct index_state *istate,
+				       const char *path)
+{
+	return convert_to_git(istate, path, NULL, 0, NULL, 0);
+}
+/* Precondition: would_convert_to_git_filter_fd(path) == true */
+void convert_to_git_filter_fd(const struct index_state *istate,
+			      const char *path, int fd,
+			      struct strbuf *dst,
+			      int conv_flags);
+int would_convert_to_git_filter_fd(const struct index_state *istate,
+				   const char *path);
+
+/*****************************************************************
+ *
+ * Streaming conversion support
+ *
+ *****************************************************************/
+
+struct stream_filter; /* opaque */
+
+struct stream_filter *get_stream_filter(const struct index_state *istate,
+					const char *path,
+					const struct object_id *);
+void free_stream_filter(struct stream_filter *);
+int is_null_stream_filter(struct stream_filter *);
+
+/*
+ * Use as much input up to *isize_p and fill output up to *osize_p;
+ * update isize_p and osize_p to indicate how much buffer space was
+ * consumed and filled. Return 0 on success, non-zero on error.
+ *
+ * Some filters may need to buffer the input and look-ahead inside it
+ * to decide what to output, and they may consume more than zero bytes
+ * of input and still not produce any output. After feeding all the
+ * input, pass NULL as input and keep calling this function, to let
+ * such filters know there is no more input coming and it is time for
+ * them to produce the remaining output based on the buffered input.
+ */
+int stream_filter(struct stream_filter *,
+		  const char *input, size_t *isize_p,
+		  char *output, size_t *osize_p);
+
+#endif /* CONVERT_H */