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More diff.h comment fixes

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Based on feedback from the ObjectiveGit folks, these are some
further updates to diff.h areas that are poorly documented.
This commit is contained in:
Russell Belfer 2012-12-17 11:03:42 -08:00
parent 56c72b759c
commit ba084f7aaf
1 changed files with 52 additions and 34 deletions
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86
include/git2/diff.h
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@ -139,7 +139,8 @@ typedef enum {
* - `new_prefix` is the virtual "directory" to prefix to new file names
* in hunk headers (default "b")
* - `pathspec` is an array of paths / fnmatch patterns to constrain diff
* - `max_size` is a file size above which a blob will be marked as binary
* - `max_size` is a file size (in bytes) above which a blob will be marked
* as binary automatically; pass a negative value to disable.
*/
typedef struct {
unsigned int version; /**< version for the struct */
@ -148,8 +149,8 @@ typedef struct {
uint16_t interhunk_lines; /**< defaults to 0 */
const char *old_prefix; /**< defaults to "a" */
const char *new_prefix; /**< defaults to "b" */
git_strarray pathspec; /**< defaults to show all paths */
git_off_t max_size; /**< defaults to 512mb */
git_strarray pathspec; /**< defaults to include all paths */
git_off_t max_size; /**< defaults to 512MB */
} git_diff_options;
#define GIT_DIFF_OPTIONS_VERSION 1
@ -157,14 +158,19 @@ typedef struct {
/**
* The diff list object that contains all individual file deltas.
*
* This is an opaque structure which will be allocated by one of the diff
* generator functions below (such as `git_diff_tree_to_tree`). You are
* responsible for releasing the object memory when done, using the
* `git_diff_list_free()` function.
*/
typedef struct git_diff_list git_diff_list;
/**
* Flags that can be set for the file on side of a diff.
* Flags for the file object on each side of a diff.
*
* Most of the flags are just for internal consumption by libgit2,
* but some of them may be interesting to external users.
* Note: most of these flags are just for **internal** consumption by
* libgit2, but some of them may be interesting to external users.
*/
typedef enum {
GIT_DIFF_FILE_VALID_OID = (1 << 0), /** `oid` value is known correct */
@ -187,34 +193,38 @@ typedef enum {
* DELETED pairs).
*/
typedef enum {
GIT_DELTA_UNMODIFIED = 0,
GIT_DELTA_ADDED = 1,
GIT_DELTA_DELETED = 2,
GIT_DELTA_MODIFIED = 3,
GIT_DELTA_RENAMED = 4,
GIT_DELTA_COPIED = 5,
GIT_DELTA_IGNORED = 6,
GIT_DELTA_UNTRACKED = 7,
GIT_DELTA_TYPECHANGE = 8,
GIT_DELTA_UNMODIFIED = 0, /** no changes */
GIT_DELTA_ADDED = 1, /** entry does not exist in old version */
GIT_DELTA_DELETED = 2, /** entry does not exist in new version */
GIT_DELTA_MODIFIED = 3, /** entry content changed between old and new */
GIT_DELTA_RENAMED = 4, /** entry was renamed between old and new */
GIT_DELTA_COPIED = 5, /** entry was copied from another old entry */
GIT_DELTA_IGNORED = 6, /** entry is ignored item in workdir */
GIT_DELTA_UNTRACKED = 7, /** entry is untracked item in workdir */
GIT_DELTA_TYPECHANGE = 8, /** type of entry changed between old and new */
} git_delta_t;
/**
* Description of one side of a diff.
* Description of one side of a diff entry.
*
* The `oid` is the `git_oid` of the item. If it represents an absent side
* of a diff (e.g. the `old_file` of a `GIT_DELTA_ADDED` delta), then the
* oid will be zeroes.
* Although this is called a "file", it may actually represent a file, a
* symbolic link, a submodule commit id, or even a tree (although that only
* if you are tracking type changes or ignored/untracked directories).
*
* `path` is the NUL-terminated path to the file relative to the working
* The `oid` is the `git_oid` of the item. If the entry represents an
* absent side of a diff (e.g. the `old_file` of a `GIT_DELTA_ADDED` delta),
* then the oid will be zeroes.
*
* `path` is the NUL-terminated path to the entry relative to the working
* directory of the repository.
*
* `size` is the size of the file in bytes.
* `size` is the size of the entry in bytes.
*
* `flags` is a combination of the `git_diff_file_flag_t` types, but those
* are largely internal values.
*
* `mode` is, roughly, the stat() st_mode value for the item. This will be
* restricted to one of the `git_filemode_t` values.
* `mode` is, roughly, the stat() `st_mode` value for the item. This will
* be restricted to one of the `git_filemode_t` values.
*/
typedef struct {
git_oid oid;
@ -225,7 +235,11 @@ typedef struct {
} git_diff_file;
/**
* Description of changes to one file.
* Description of changes to one entry.
*
* When iterating over a diff list object, this will be passed to most
* callback functions and you can use the contents to understand exactly
* what has changed.
*
* The `old_file` repesents the "from" side of the diff and the `new_file`
* repesents to "to" side of the diff. What those means depend on the
@ -253,6 +267,10 @@ typedef struct {
/**
* When iterating over a diff, callback that will be made per file.
*
* @param delta A pointer to the delta data for the file
* @param progress Goes from 0 to 1 over the diff list
* @param payload User-specified pointer from foreach function
*/
typedef int (*git_diff_file_cb)(
const git_diff_delta *delta,
@ -263,10 +281,10 @@ typedef int (*git_diff_file_cb)(
* Structure describing a hunk of a diff.
*/
typedef struct {
int old_start;
int old_lines;
int new_start;
int new_lines;
int old_start; /** Starting line number in old_file */
int old_lines; /** Number of lines in old_file */
int new_start; /** Starting line number in new_file */
int new_lines; /** Number of lines in new_file */
} git_diff_range;
/**
@ -314,12 +332,12 @@ typedef enum {
* of lines of file and hunk headers.
*/
typedef int (*git_diff_data_cb)(
const git_diff_delta *delta,
const git_diff_range *range,
char line_origin, /**< GIT_DIFF_LINE_... value from above */
const char *content,
size_t content_len,
void *payload);
const git_diff_delta *delta, /** delta that contains this data */
const git_diff_range *range, /** range of lines containing this data */
char line_origin, /** git_diff_list_t value from above */
const char *content, /** diff data - not NUL terminated */
size_t content_len, /** number of bytes of diff data */
void *payload); /** user reference data */
/**
* The diff patch is used to store all the text diffs for a delta.