Re: [PATCH] compat/regex: fix compilation on Windows

> The real issue here is that GNU awk's regex implementation assumes a bit
> too much about the relative sizes of pointers and long integers. What they
> really want is to use intptr_t.
>
> This patch recapitulates what 56a1a3ab449 (Silence GCC's "cast of pointer
> to integer of a different size" warning, 2015-10-26) did to our previous
> copy of GNU awk's regex engine.
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
> Published-As: https://github.com/dscho/git/releases/tag/compat-regex-fixes-v1
> Fetch-It-Via: git fetch https://github.com/dscho/git compat-regex-fixes-v1
>
>  .../0003-Use-intptr_t-instead-of-long.patch        | 22 ++++++++++++++++++++++
>  compat/regex/regcomp.c                             |  4 ++--
>  2 files changed, 24 insertions(+), 2 deletions(-)
>  create mode 100644 compat/regex/patches/0003-Use-intptr_t-instead-of-long.patch
>
> diff --git a/compat/regex/patches/0003-Use-intptr_t-instead-of-long.patch b/compat/regex/patches/0003-Use-intptr_t-instead-of-long.patch
> new file mode 100644
> index 00000000000..246ff256fb8
> --- /dev/null
> +++ b/compat/regex/patches/0003-Use-intptr_t-instead-of-long.patch
> @@ -0,0 +1,22 @@
> +diff --git a/compat/regex/regcomp.c b/compat/regex/regcomp.c
> +index 5e9ea26cd46..e6469167a80 100644
> +--- a/compat/regex/regcomp.c
> ++++ b/compat/regex/regcomp.c
> +@@ -2641,7 +2641,7 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
> +     old_tree = NULL;
> +
> +   if (elem->token.type == SUBEXP)
> +-    postorder (elem, mark_opt_subexp, (void *) (long) elem->token.opr.idx);
> ++    postorder (elem, mark_opt_subexp, (void *) (intptr_t) elem->token.opr.idx);
> +
> +   tree = create_tree (dfa, elem, NULL, (end == -1 ? OP_DUP_ASTERISK : OP_ALT));
> +   if (BE (tree == NULL, 0))
> +@@ -3868,7 +3868,7 @@ create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
> + static reg_errcode_t
> + mark_opt_subexp (void *extra, bin_tree_t *node)
> + {
> +-  int idx = (int) (long) extra;
> ++  int idx = (int) (intptr_t) extra;
> +   if (node->token.type == SUBEXP && node->token.opr.idx == idx)
> +     node->token.opt_subexp = 1;
> +
> diff --git a/compat/regex/regcomp.c b/compat/regex/regcomp.c
> index 5e9ea26cd46..e6469167a80 100644
> --- a/compat/regex/regcomp.c
> +++ b/compat/regex/regcomp.c
> @@ -2641,7 +2641,7 @@ parse_dup_op (bin_tree_t *elem, re_string_t *regexp, re_dfa_t *dfa,
>      old_tree = NULL;
>
>    if (elem->token.type == SUBEXP)
> -    postorder (elem, mark_opt_subexp, (void *) (long) elem->token.opr.idx);
> +    postorder (elem, mark_opt_subexp, (void *) (intptr_t) elem->token.opr.idx);
>
>    tree = create_tree (dfa, elem, NULL, (end == -1 ? OP_DUP_ASTERISK : OP_ALT));
>    if (BE (tree == NULL, 0))
> @@ -3868,7 +3868,7 @@ create_token_tree (re_dfa_t *dfa, bin_tree_t *left, bin_tree_t *right,
>  static reg_errcode_t
>  mark_opt_subexp (void *extra, bin_tree_t *node)
>  {
> -  int idx = (int) (long) extra;
> +  int idx = (int) (intptr_t) extra;
>    if (node->token.type == SUBEXP && node->token.opr.idx == idx)
>      node->token.opt_subexp = 1;
>
>
> base-commit: 4e23cefb4da69a2d884c2d5a303825f40008ca42
> --
> 2.12.2.windows.2.800.gede8f145e06