datasize.c
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上传日期:2010-01-21
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文件大小:1k
- /*
- * datasize.c -- print the size of common data items
- * This runs with any Linux kernel (not any Unix, because of <linux/types.h>)
- *
- * Copyright (C) 2001 Alessandro Rubini and Jonathan Corbet
- * Copyright (C) 2001 O'Reilly & Associates
- *
- * The source code in this file can be freely used, adapted,
- * and redistributed in source or binary form, so long as an
- * acknowledgment appears in derived source files. The citation
- * should list that the code comes from the book "Linux Device
- * Drivers" by Alessandro Rubini and Jonathan Corbet, published
- * by O'Reilly & Associates. No warranty is attached;
- * we cannot take responsibility for errors or fitness for use.
- */
- #include <stdio.h>
- #include <sys/utsname.h>
- #include <linux/types.h>
- int main(int argc, char **argv)
- {
- struct utsname name;
- uname(&name); /* never fails :) */
- printf("arch Size: char short int long ptr long-long "
- " u8 u16 u32 u64n");
- printf( "%-12s %3i %3i %3i %3i %3i %3i "
- "%3i %3i %3i %3in",
- name.machine,
- (int)sizeof(char), (int)sizeof(short), (int)sizeof(int),
- (int)sizeof(long),
- (int)sizeof(void *), (int)sizeof(long long), (int)sizeof(__u8),
- (int)sizeof(__u16), (int)sizeof(__u32), (int)sizeof(__u64));
- return 0;
- }