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Fix cctype return spec: true returns are encoded as non-zero, not 1 #49

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gmalecha-at-skylabs merged 1 commit into from
Apr 30, 2026
Merged

Fix cctype return spec: true returns are encoded as non-zero, not 1 #49

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25 changes: 14 additions & 11 deletions rocq-brick-libstdcpp/proof/cctype/spec.v
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Original file line number Diff line number Diff line change
Expand Up @@ -23,60 +23,63 @@ Section with_cpp.
(* TODO: these functions should be [extern "C"] and specified with
[cpp.spec "isalpha" with], troubleshoot why this doesn't work on Mac. *)

(** Determine if <i> represents <true> or <false>. *)
#[local] Notation int_bool i b := (bool_decide (i <> 0) = b) (only parsing).

cpp.spec (named "isalpha") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isalpha c)] emp).
\post{z}[Vint z] [| int_bool z (isalpha c) |]).

cpp.spec (named "isdigit") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isdigit c)] emp).
\post{z}[Vint z] [| int_bool z (isdigit c) |]).

cpp.spec (named "isalnum") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isalnum c)] emp).
\post{z}[Vint z] [| int_bool z (isalnum c) |]).

cpp.spec (named "isspace") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isspace c)] emp).
\post{z}[Vint z] [| int_bool z (isspace c) |]).

cpp.spec (named "islower") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (islower c)] emp).
\post{z}[Vint z] [| int_bool z (islower c) |]).

cpp.spec (named "isupper") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isupper c)] emp).
\post{z}[Vint z] [| int_bool z (isupper c) |]).

cpp.spec (named "isprint") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isprint c)] emp).
\post{z}[Vint z] [| int_bool z (isprint c) |]).

cpp.spec (named "ispunct") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (ispunct c)] emp).
\post{z}[Vint z] [| int_bool z (ispunct c) |]).

cpp.spec (named "iscntrl") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (iscntrl c)] emp).
\post{z}[Vint z] [| int_bool z (iscntrl c) |]).

cpp.spec (named "isgraph") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isgraph c)] emp).
\post{z}[Vint z] [| int_bool z (isgraph c) |]).

cpp.spec (named "isxdigit") with
(\arg{c} "c" (Vint c)
\require VALID c
\post[Vbool (isxdigit c)] emp).
\post{z}[Vint z] [| int_bool z (isxdigit c) |]).

(* Specifications for Character Conversion Functions *)

Expand Down