projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| 59e0d9fe A |
1 | --- memcpy.3.orig Fri May 28 17:44:25 2004 |
| 2 | +++ memcpy.3 Fri May 28 17:45:22 2004 | |
| 3 | @@ -41,7 +41,7 @@ | |
| 4 | .Os | |
| 5 | .Sh NAME | |
| 6 | .Nm memcpy | |
| 7 | -.Nd copy byte string | |
| 8 | +.Nd copy memory area | |
| 9 | .Sh LIBRARY | |
| 10 | .Lb libc | |
| 11 | .Sh SYNOPSIS | |
| 12 | @@ -54,10 +54,22 @@ | |
| 13 | function | |
| 14 | copies | |
| 15 | .Fa len | |
| 16 | -bytes from string | |
| 17 | +bytes from memory area | |
| 9385eb3d | 18 | .Fa src |
| 59e0d9fe A |
19 | -to string |
| 20 | +to memory area | |
| 9385eb3d A |
21 | .Fa dst . |
| 22 | +If | |
| 23 | +.Fa src | |
| 24 | +and | |
| 25 | +.Fa dst | |
| 59e0d9fe | 26 | +overlap, behavior is undefined. |
| 9385eb3d A |
27 | +Applications in which |
| 28 | +.Fa src | |
| 29 | +and | |
| 30 | +.Fa dst | |
| 31 | +might overlap should use | |
| 32 | +.Xr memmove 3 | |
| 33 | +instead. | |
| 34 | .Sh RETURN VALUES | |
| 35 | The | |
| 36 | .Fn memcpy | |
| 37 | @@ -75,17 +87,3 @@ | |
| 38 | function | |
| 39 | conforms to | |
| 40 | .St -isoC . | |
| 41 | -.Sh BUGS | |
| 42 | -In this implementation | |
| 43 | -.Fn memcpy | |
| 44 | -is implemented using | |
| 45 | -.Xr bcopy 3 , | |
| 46 | -and therefore the strings may overlap. | |
| 47 | -On other systems, copying overlapping strings may produce surprises. | |
| 48 | -Programs intended to be portable should use | |
| 49 | -.Xr memmove 3 | |
| 50 | -when | |
| 51 | -.Fa src | |
| 52 | -and | |
| 53 | -.Fa dst | |
| 54 | -may overlap. |