From de848d9e9146434817c65d74d1d0313e9d729462 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 14:01:37 +0200 Subject: Adding upstream version 1.4.0. Signed-off-by: Daniel Baumann --- libpam/include/pam_inline.h | 67 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 libpam/include/pam_inline.h (limited to 'libpam/include/pam_inline.h') diff --git a/libpam/include/pam_inline.h b/libpam/include/pam_inline.h new file mode 100644 index 0000000..ec05fe4 --- /dev/null +++ b/libpam/include/pam_inline.h @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2020 Dmitry V. Levin + * + * 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" +#include + +/* + * 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_)) + +/* + * Returns NULL if STR does not start with PREFIX, + * or a pointer to the first char in STR after PREFIX. + * The length of PREFIX is specified by PREFIX_LEN. + */ +static inline const char * +pam_str_skip_prefix_len(const char *str, const char *prefix, size_t prefix_len) +{ + return strncmp(str, prefix, prefix_len) ? NULL : str + prefix_len; +} + +#define pam_str_skip_prefix(str_, prefix_) \ + pam_str_skip_prefix_len((str_), (prefix_), sizeof(prefix_) - 1 + PAM_MUST_BE_ARRAY(prefix_)) + +/* + * Returns NULL if STR does not start with PREFIX + * (ignoring the case of the characters), + * or a pointer to the first char in STR after PREFIX. + * The length of PREFIX is specified by PREFIX_LEN. + */ +static inline const char * +pam_str_skip_icase_prefix_len(const char *str, const char *prefix, size_t prefix_len) +{ + return strncasecmp(str, prefix, prefix_len) ? NULL : str + prefix_len; +} + +#define pam_str_skip_icase_prefix(str_, prefix_) \ + pam_str_skip_icase_prefix_len((str_), (prefix_), sizeof(prefix_) - 1 + PAM_MUST_BE_ARRAY(prefix_)) + +#endif /* PAM_INLINE_H */ -- cgit v1.2.3