diff options
Diffstat (limited to 'ccan/ilog/_info')
-rw-r--r-- | ccan/ilog/_info | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/ccan/ilog/_info b/ccan/ilog/_info deleted file mode 100644 index f1f3f2d..0000000 --- a/ccan/ilog/_info +++ /dev/null @@ -1,50 +0,0 @@ -/** - * ilog - Integer logarithm. - * - * ilog_32() and ilog_64() compute the minimum number of bits required to store - * an unsigned 32-bit or 64-bit value without any leading zero bits. - * - * This can also be thought of as the location of the highest set bit, with - * counting starting from one (so that 0 returns 0, 1 returns 1, and 2**31 - * returns 32). - * - * When the value is known to be non-zero ilog32_nz() and ilog64_nz() can - * compile into as few as two instructions, one of which may get optimized out - * later. - * - * STATIC_ILOG_32 and STATIC_ILOG_64 allow computation on compile-time - * constants, so other compile-time constants can be derived from them. - * - * Example: - * #include <stdio.h> - * #include <limits.h> - * #include <ccan/ilog/ilog.h> - * - * int main(void){ - * int i; - * printf("ilog32(0x%08X)=%i\n",0,ilog32(0)); - * for(i=1;i<=STATIC_ILOG_32(USHRT_MAX);i++){ - * uint32_t v; - * v=(uint32_t)1U<<(i-1); - * //Here we know v is non-zero, so we can use ilog32_nz(). - * printf("ilog32(0x%08X)=%i\n",v,ilog32_nz(v)); - * } - * return 0; - * } - * - * License: CC0 (Public domain) - * Author: Timothy B. Terriberry <tterribe@xiph.org> - */ -#include "config.h" -#include <string.h> -#include <stdio.h> - -int main(int _argc,const char *_argv[]){ - /*Expect exactly one argument.*/ - if(_argc!=2)return 1; - if(strcmp(_argv[1],"depends")==0){ - printf("ccan/compiler\n"); - return 0; - } - return 1; -} |