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docs: repair and clarify memmove and memcpy contract

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The old format didn't cover some possibilities.
This commit is contained in:
Matthew Flatt 2018-01-24 15:41:16 -07:00
parent a12a4a51b0
commit 5680721f04
1 changed files with 5 additions and 32 deletions
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37
pkgs/racket-doc/scribblings/foreign/pointers.scrbl
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@ -138,20 +138,9 @@ easily lead to a segmentation fault or memory corruption.}
@defproc*[([(memmove [cptr cpointer?] @defproc*[([(memmove [cptr cpointer?]
[offset exact-integer? 0]
[src-cptr cpointer?] [src-cptr cpointer?]
[count exact-nonnegative-integer?] [src-offset exact-integer? 0]
[type ctype? _byte])
void?]
[(memmove [cptr cpointer?]
[offset exact-integer?]
[src-cptr cpointer?]
[count exact-nonnegative-integer?]
[type ctype? _byte])
void?]
[(memmove [cptr cpointer?]
[offset exact-integer?]
[src-cptr cpointer?]
[src-offset exact-integer?]
[count exact-nonnegative-integer?] [count exact-nonnegative-integer?]
[type ctype? _byte]) [type ctype? _byte])
void?])]{ void?])]{
@ -164,20 +153,9 @@ destination is determined by @racket[count], which is in @racket[type]
instances when supplied.} instances when supplied.}
@defproc*[([(memcpy [cptr cpointer?] @defproc*[([(memcpy [cptr cpointer?]
[offset exact-integer? 0]
[src-cptr cpointer?] [src-cptr cpointer?]
[count exact-nonnegative-integer?] [src-offset exact-integer? 0]
[type ctype? _byte])
void?]
[(memcpy [cptr cpointer?]
[offset exact-integer?]
[src-cptr cpointer?]
[count exact-nonnegative-integer?]
[type ctype? _byte])
void?]
[(memcpy [cptr cpointer?]
[offset exact-integer?]
[src-cptr cpointer?]
[src-offset exact-integer?]
[count exact-nonnegative-integer?] [count exact-nonnegative-integer?]
[type ctype? _byte]) [type ctype? _byte])
void?])]{ void?])]{
@ -186,12 +164,7 @@ Like @racket[memmove], but the result is undefined if the destination
and source overlap.} and source overlap.}
@defproc*[([(memset [cptr cpointer?] @defproc*[([(memset [cptr cpointer?]
[byte byte?] [offset exact-integer? 0]
[count exact-nonnegative-integer?]
[type ctype? _byte])
void?]
[(memset [cptr cpointer?]
[offset exact-integer?]
[byte byte?] [byte byte?]
[count exact-nonnegative-integer?] [count exact-nonnegative-integer?]
[type ctype? _byte]) [type ctype? _byte])