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stdio-common: Add __printf_function_invoke

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And __wprintf_function_invoke.  These functions will be used to
to call registered printf specifier callbacks on printf buffers
after vfprintf and vfwprintf have been converted to buffers.  The new
implementation avoids alloca/variable length arrays.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2022-12-19 18:56:54 +01:00
parent 659fe9fdd1
commit c7bf2e99ca
5 changed files with 114 additions and 0 deletions
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10
include/printf.h
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@@ -41,6 +41,16 @@ union printf_arg
void *pa_user;
};
/* Invoke a registered printf callback. Called from vfprintf and vfwprintf. */
int __printf_function_invoke (void *, printf_function callback,
union printf_arg *args_value,
size_t ndata_args,
struct printf_info *info) attribute_hidden;
int __wprintf_function_invoke (void *, printf_function callback,
union printf_arg *args_value,
size_t ndata_args,
struct printf_info *info) attribute_hidden;
#include <bits/types/locale_t.h>
/* Now define the internal interfaces. */