diff options
Diffstat (limited to 'contrib/libdiff/include/diff_output.h')
| -rw-r--r-- | contrib/libdiff/include/diff_output.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/contrib/libdiff/include/diff_output.h b/contrib/libdiff/include/diff_output.h new file mode 100644 index 000000000000..500ee6427574 --- /dev/null +++ b/contrib/libdiff/include/diff_output.h @@ -0,0 +1,116 @@ +/* Diff output generators and invocation shims. */ +/* + * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +struct diff_input_info { + const char *left_path; + const char *right_path; + + /* Set by caller of diff_output_* functions. */ + int flags; +#define DIFF_INPUT_LEFT_NONEXISTENT 0x00000001 +#define DIFF_INPUT_RIGHT_NONEXISTENT 0x00000002 +}; + +struct diff_output_info { + /* + * Byte offset to each line in the generated output file. + * The total number of lines in the file is line_offsets.len - 1. + * The last offset in this array corresponds to end-of-file. + */ + ARRAYLIST(off_t) line_offsets; + /* + * Type (i.e., context, minus, plus) of each line generated by the diff. + * nb. 0x00 to 0x3b reserved for client-defined line types. + */ + ARRAYLIST(uint8_t) line_types; +#define DIFF_LINE_HUNK 0x3c +#define DIFF_LINE_MINUS 0x3d +#define DIFF_LINE_PLUS 0x3e +#define DIFF_LINE_CONTEXT 0x3f +#define DIFF_LINE_NONE 0x40 /* binary or no EOF newline msg, etc. */ +}; + +void diff_output_info_free(struct diff_output_info *output_info); + +struct diff_chunk_context { + struct diff_range chunk; + struct diff_range left, right; +}; + +int diff_output_plain(struct diff_output_info **output_info, FILE *dest, + const struct diff_input_info *info, + const struct diff_result *result, + int hunk_headers_only); +int diff_output_unidiff(struct diff_output_info **output_info, + FILE *dest, const struct diff_input_info *info, + const struct diff_result *result, + unsigned int context_lines); +int diff_output_edscript(struct diff_output_info **output_info, + FILE *dest, const struct diff_input_info *info, + const struct diff_result *result); +int diff_chunk_get_left_start(const struct diff_chunk *c, + const struct diff_result *r, + int context_lines); +int diff_chunk_get_left_end(const struct diff_chunk *c, + const struct diff_result *r, + int context_lines); +int diff_chunk_get_right_start(const struct diff_chunk *c, + const struct diff_result *r, + int context_lines); +int diff_chunk_get_right_end(const struct diff_chunk *c, + const struct diff_result *r, + int context_lines); +off_t diff_chunk_get_left_start_pos(const struct diff_chunk *c); +off_t diff_chunk_get_right_start_pos(const struct diff_chunk *c); +struct diff_chunk *diff_chunk_get(const struct diff_result *r, int chunk_idx); +int diff_chunk_get_left_count(struct diff_chunk *c); +int diff_chunk_get_right_count(struct diff_chunk *c); +void diff_chunk_context_get(struct diff_chunk_context *cc, + const struct diff_result *r, + int chunk_idx, int context_lines); +void diff_chunk_context_load_change(struct diff_chunk_context *cc, + int *nchunks_used, + struct diff_result *result, + int start_chunk_idx, + int context_lines); + +struct diff_output_unidiff_state; +struct diff_output_unidiff_state *diff_output_unidiff_state_alloc(void); +void diff_output_unidiff_state_reset(struct diff_output_unidiff_state *state); +void diff_output_unidiff_state_free(struct diff_output_unidiff_state *state); +int diff_output_unidiff_chunk(struct diff_output_info **output_info, FILE *dest, + struct diff_output_unidiff_state *state, + const struct diff_input_info *info, + const struct diff_result *result, + const struct diff_chunk_context *cc); +int diff_output_chunk_left_version(struct diff_output_info **output_info, + FILE *dest, + const struct diff_input_info *info, + const struct diff_result *result, + const struct diff_chunk_context *cc); +int diff_output_chunk_right_version(struct diff_output_info **output_info, + FILE *dest, + const struct diff_input_info *info, + const struct diff_result *result, + const struct diff_chunk_context *cc); + +const char *diff_output_get_label_left(const struct diff_input_info *info); +const char *diff_output_get_label_right(const struct diff_input_info *info); + +void diff_output_set_colors(bool _color, + const char *_del_code, + const char *_add_code); |