Difference between revisions of "Patch (utility)"
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The '''diff''' utility is used to create patches, which can then be applied by '''patch'''. | The '''diff''' utility is used to create patches, which can then be applied by '''patch'''. | ||
| + | |||
| + | == Unified Diff == | ||
| + | The most common format for patches is the unified diff. The unified diff shows both line additions and removals, which are indicated by '+' and '-' symbols at the front of each line, respectively. | ||
| + | |||
| + | Example unified diff: | ||
| + | <pre> | ||
| + | --- a/pyl.asm | ||
| + | +++ b/pyl.asm | ||
| + | @@ -55,9 +55,9 @@ START: | ||
| + | jsr draw_active_square | ||
| + | |||
| + | main: | ||
| + | - ; Wait 16 frames. (1/3 second) | ||
| + | - ; TODO: Support PAL timing. | ||
| + | - moveq #15, d0 | ||
| + | + ; Wait a bit to advance the square. | ||
| + | + moveq #0, d0 | ||
| + | + move.b RAM_Frames_SquareAdvance, d0 | ||
| + | .vsync_loop: | ||
| + | jsr VSync | ||
| + | dbf d0, .vsync_loop | ||
| + | </pre> | ||
== Downloads == | == Downloads == | ||
Revision as of 16:16, 23 February 2009
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patch is a utility used to apply source code patches to a source code tree. Source code patches are commonly used to distribute code changes to developers working on an open-source project.
The diff utility is used to create patches, which can then be applied by patch.
Unified Diff
The most common format for patches is the unified diff. The unified diff shows both line additions and removals, which are indicated by '+' and '-' symbols at the front of each line, respectively.
Example unified diff:
--- a/pyl.asm
+++ b/pyl.asm
@@ -55,9 +55,9 @@ START:
jsr draw_active_square
main:
- ; Wait 16 frames. (1/3 second)
- ; TODO: Support PAL timing.
- moveq #15, d0
+ ; Wait a bit to advance the square.
+ moveq #0, d0
+ move.b RAM_Frames_SquareAdvance, d0
.vsync_loop:
jsr VSync
dbf d0, .vsync_loop
Downloads
- GNU patch: http://www.gnu.org/software/patch/
- GNU patch (Win32): http://gnuwin32.sourceforge.net/packages/patch.htm
- GNU diffutils: http://www.gnu.org/software/diffutils/
- GNU diffutils (Win32): http://gnuwin32.sourceforge.net/packages/diffutils.htm