mirror of
https://github.com/rkd77/elinks.git
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108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/* This is... er, the OS-independent part of osdep/ ;-). */
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#ifndef EL__OSDEP_GENERIC_H
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#define EL__OSDEP_GENERIC_H
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#ifdef HAVE_LIMITS_H
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#include <limits.h> /* may contain PIPE_BUF definition on some systems */
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#endif
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#ifdef HAVE_STDDEF_H
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#include <stddef.h> /* may contain offsetof() */
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#endif
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#ifndef PIPE_BUF
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#define PIPE_BUF 512 /* POSIX says that. -- Mikulas */
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#endif
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/* These are not available on some IRIX systems. */
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#ifndef INET_ADDRSTRLEN
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#define INET_ADDRSTRLEN 16
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#endif
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#ifndef INET6_ADDRSTRLEN
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#define INET6_ADDRSTRLEN 46
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#endif
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#ifdef CONFIG_IPV6
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#define IP_ADDRESS_BUFFER_SIZE INET6_ADDRSTRLEN
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#else
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#define IP_ADDRESS_BUFFER_SIZE INET_ADDRSTRLEN
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#endif
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#ifndef PF_INET
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#define PF_INET AF_INET
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#endif
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#ifndef PF_INET6
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#define PF_INET6 AF_INET6
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#endif
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/* Attempt to workaround the EINTR mess. */
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#if defined(EINTR) && !defined(CONFIG_OS_WIN32)
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#ifdef TEMP_FAILURE_RETRY /* GNU libc */
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#define safe_read(fd, buf, count) TEMP_FAILURE_RETRY(read(fd, buf, count))
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#define safe_write(fd, buf, count) TEMP_FAILURE_RETRY(write(fd, buf, count))
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#else /* TEMP_FAILURE_RETRY */
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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static inline ssize_t
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safe_read(int fd, void *buf, size_t count) {
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do {
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ssize_t r = read(fd, buf, count);
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if (r == -1 && errno == EINTR) continue;
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return r;
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} while (1);
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}
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static inline ssize_t
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safe_write(int fd, const void *buf, size_t count) {
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do {
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ssize_t w = write(fd, buf, count);
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if (w == -1 && errno == EINTR) continue;
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return w;
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} while (1);
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}
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#endif /* TEMP_FAILURE_RETRY */
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#else /* EINTR && !CONFIG_OS_WIN32 */
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#define safe_read(fd, buf, count) read(fd, buf, count)
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#define safe_write(fd, buf, count) write(fd, buf, count)
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#endif /* EINTR && !CONFIG_OS_WIN32 */
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#ifndef HAVE_FTELLO
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#define ftello(stream) ftell(stream)
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#endif
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#ifndef HAVE_FSEEKO
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#define fseeko(stream, offset, whence) fseek(stream, offset, whence)
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#endif
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/* Compiler area: */
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/* Some compilers, like SunOS4 cc, don't have offsetof in <stddef.h>. */
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#ifndef offsetof
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#define offsetof(type, ident) ((size_t) &(((type *) 0)->ident))
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#endif
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/* Alignment of types. */
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#define alignof(TYPE) \
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offsetof(struct { unsigned char dummy1; TYPE dummy2; }, dummy2)
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/* Using this macro to copy structs is both faster and safer than
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* memcpy(destination, source, sizeof(source)). Please, use this macro instead
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* of memcpy(). */
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#define copy_struct(destination, source) \
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do { (*(destination) = *(source)); } while (0)
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#define sizeof_array(array) (sizeof(array)/sizeof(*(array)))
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#endif
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