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| author | Dmitry V. Levin <ldv@altlinux.org> | 2020-03-16 21:02:18 +0000 |
|---|---|---|
| committer | Dmitry V. Levin <ldv@altlinux.org> | 2020-03-19 18:40:16 +0000 |
| commit | a8b4dce7b53d73de372e150028c970ee0a2a2e97 (patch) | |
| tree | ff1f409cc316701b981f8dadd3ddb14866c92b8b | |
| parent | 9db69633449a4829d971e8aded348c5c3e9dda64 (diff) | |
| download | pam-a8b4dce7b53d73de372e150028c970ee0a2a2e97.tar.gz pam-a8b4dce7b53d73de372e150028c970ee0a2a2e97.tar.bz2 pam-a8b4dce7b53d73de372e150028c970ee0a2a2e97.zip | |
Introduce pam_inline.h
Introduce a new internal header file for definitions of handly inline
functions and macros providing some convenient functionality to libpam
and its modules.
* libpam/include/pam_cc_compat.h (PAM_SAME_TYPE): New macro.
* libpam/include/pam_inline.h: New file.
* libpam/Makefile.am (noinst_HEADERS): Add include/pam_inline.h.
| -rw-r--r-- | libpam/Makefile.am | 3 | ||||
| -rw-r--r-- | libpam/include/pam_cc_compat.h | 13 | ||||
| -rw-r--r-- | libpam/include/pam_inline.h | 37 |
3 files changed, 52 insertions, 1 deletions
diff --git a/libpam/Makefile.am b/libpam/Makefile.am index bd3dc5d3..3845517f 100644 --- a/libpam/Makefile.am +++ b/libpam/Makefile.am @@ -23,7 +23,8 @@ include_HEADERS = include/security/_pam_compat.h \ include/security/pam_ext.h include/security/pam_modutil.h noinst_HEADERS = pam_prelude.h pam_private.h pam_tokens.h \ - pam_modutil_private.h include/pam_cc_compat.h + pam_modutil_private.h include/pam_cc_compat.h \ + include/pam_inline.h libpam_la_LDFLAGS = -no-undefined -version-info 85:1:85 libpam_la_LIBADD = @LIBAUDIT@ $(LIBPRELUDE_LIBS) $(ECONF_LIBS) @LIBDL@ diff --git a/libpam/include/pam_cc_compat.h b/libpam/include/pam_cc_compat.h index c43989f7..69190368 100644 --- a/libpam/include/pam_cc_compat.h +++ b/libpam/include/pam_cc_compat.h @@ -50,4 +50,17 @@ # define DIAG_POP_IGNORE_CAST_ALIGN /* empty */ #endif +/* + * Evaluates to + * 1, if the given two types are known to be the same + * 0, otherwise. + */ +#if PAM_GNUC_PREREQ(3, 0) +# define PAM_IS_SAME_TYPE(x_, y_) \ + __builtin_types_compatible_p(__typeof__(x_), __typeof__(y_)) +#else +/* Cannot tell whether these types are the same. */ +# define PAM_IS_SAME_TYPE(x_, y_) 0 +#endif + #endif /* PAM_CC_COMPAT_H */ diff --git a/libpam/include/pam_inline.h b/libpam/include/pam_inline.h new file mode 100644 index 00000000..d93f8474 --- /dev/null +++ b/libpam/include/pam_inline.h @@ -0,0 +1,37 @@ +/* + * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org> + * + * Handy inline functions and macros providing some convenient functionality + * to libpam and its modules. + */ + +#ifndef PAM_INLINE_H +#define PAM_INLINE_H + +#include "pam_cc_compat.h" + +/* + * Evaluates to + * - a syntax error if the argument is 0, + * 0, otherwise. + */ +#define PAM_FAIL_BUILD_ON_ZERO(e_) (sizeof(int[-1 + 2 * !!(e_)]) * 0) + +/* + * Evaluates to + * 1, if the given type is known to be a non-array type + * 0, otherwise. + */ +#define PAM_IS_NOT_ARRAY(a_) PAM_IS_SAME_TYPE((a_), &(a_)[0]) + +/* + * Evaluates to + * - a syntax error if the argument is not an array, + * 0, otherwise. + */ +#define PAM_MUST_BE_ARRAY(a_) PAM_FAIL_BUILD_ON_ZERO(!PAM_IS_NOT_ARRAY(a_)) + +/* Evaluates to the number of elements in the specified array. */ +#define PAM_ARRAY_SIZE(a_) (sizeof(a_) / sizeof((a_)[0]) + PAM_MUST_BE_ARRAY(a_)) + +#endif /* PAM_INLINE_H */ |