convert.h

   1 /*
   2  * Copyright (c) 2011, Google Inc.
   3  */
   4 #ifndef CONVERT_H
   5 #define CONVERT_H
   6
   7 #include "string-list.h"
   8
   9 struct index_state;
  10
  11 #define CONV_EOL_RNDTRP_DIE   (1<<0) /* Die if CRLF to LF to CRLF is different */
  12 #define CONV_EOL_RNDTRP_WARN  (1<<1) /* Warn if CRLF to LF to CRLF is different */
  13 #define CONV_EOL_RENORMALIZE  (1<<2) /* Convert CRLF to LF */
  14 #define CONV_EOL_KEEP_CRLF    (1<<3) /* Keep CRLF line endings as is */
  15 #define CONV_WRITE_OBJECT     (1<<4) /* Content is written to the index */
  16
  17 extern int global_conv_flags_eol;
  18
  19 enum auto_crlf {
  20         AUTO_CRLF_FALSE = 0,
  21         AUTO_CRLF_TRUE = 1,
  22         AUTO_CRLF_INPUT = -1
  23 };
  24
  25 extern enum auto_crlf auto_crlf;
  26
  27 enum eol {
  28         EOL_UNSET,
  29         EOL_CRLF,
  30         EOL_LF,
  31 #ifdef NATIVE_CRLF
  32         EOL_NATIVE = EOL_CRLF
  33 #else
  34         EOL_NATIVE = EOL_LF
  35 #endif
  36 };
  37
  38 enum ce_delay_state {
  39         CE_NO_DELAY = 0,
  40         CE_CAN_DELAY = 1,
  41         CE_RETRY = 2
  42 };
  43
  44 struct delayed_checkout {
  45         /*
  46          * State of the currently processed cache entry. If the state is
  47          * CE_CAN_DELAY, then the filter can delay the current cache entry.
  48          * If the state is CE_RETRY, then this signals the filter that the
  49          * cache entry was requested before.
  50          */
  51         enum ce_delay_state state;
  52         /* List of filter drivers that signaled delayed blobs. */
  53         struct string_list filters;
  54         /* List of delayed blobs identified by their path. */
  55         struct string_list paths;
  56 };
  57
  58 extern enum eol core_eol;
  59 extern const char *get_cached_convert_stats_ascii(const struct index_state *istate,
  60                                                   const char *path);
  61 extern const char *get_wt_convert_stats_ascii(const char *path);
  62 extern const char *get_convert_attr_ascii(const char *path);
  63
  64 /* returns 1 if *dst was used */
  65 extern int convert_to_git(const struct index_state *istate,
  66                           const char *path, const char *src, size_t len,
  67                           struct strbuf *dst, int conv_flags);
  68 extern int convert_to_working_tree(const char *path, const char *src,
  69                                    size_t len, struct strbuf *dst);
  70 extern int async_convert_to_working_tree(const char *path, const char *src,
  71                                          size_t len, struct strbuf *dst,
  72                                          void *dco);
  73 extern int async_query_available_blobs(const char *cmd, struct string_list *available_paths);
  74 extern int renormalize_buffer(const struct index_state *istate,
  75                               const char *path, const char *src, size_t len,
  76                               struct strbuf *dst);
  77 static inline int would_convert_to_git(const struct index_state *istate,
  78                                        const char *path)
  79 {
  80         return convert_to_git(istate, path, NULL, 0, NULL, 0);
  81 }
  82 /* Precondition: would_convert_to_git_filter_fd(path) == true */
  83 extern void convert_to_git_filter_fd(const struct index_state *istate,
  84                                      const char *path, int fd,
  85                                      struct strbuf *dst,
  86                                      int conv_flags);
  87 extern int would_convert_to_git_filter_fd(const char *path);
  88
  89 /*****************************************************************
  90  *
  91  * Streaming conversion support
  92  *
  93  *****************************************************************/
  94
  95 struct stream_filter; /* opaque */
  96
  97 extern struct stream_filter *get_stream_filter(const char *path, const unsigned char *);
  98 extern void free_stream_filter(struct stream_filter *);
  99 extern int is_null_stream_filter(struct stream_filter *);
 100
 101 /*
 102  * Use as much input up to *isize_p and fill output up to *osize_p;
 103  * update isize_p and osize_p to indicate how much buffer space was
 104  * consumed and filled. Return 0 on success, non-zero on error.
 105  *
 106  * Some filters may need to buffer the input and look-ahead inside it
 107  * to decide what to output, and they may consume more than zero bytes
 108  * of input and still not produce any output. After feeding all the
 109  * input, pass NULL as input and keep calling this function, to let
 110  * such filters know there is no more input coming and it is time for
 111  * them to produce the remaining output based on the buffered input.
 112  */
 113 extern int stream_filter(struct stream_filter *,
 114                          const char *input, size_t *isize_p,
 115                          char *output, size_t *osize_p);
 116
 117 #endif /* CONVERT_H */