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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "runtime.h"
enum {
maxround = sizeof(uintptr),
};
static uint32 fastrand;
int32
runtime_mcmp(byte *s1, byte *s2, uint32 n)
{
uint32 i;
byte c1, c2;
for(i=0; i<n; i++) {
c1 = s1[i];
c2 = s2[i];
if(c1 < c2)
return -1;
if(c1 > c2)
return +1;
}
return 0;
}
byte*
runtime_mchr(byte *p, byte c, byte *ep)
{
for(; p < ep; p++)
if(*p == c)
return p;
return nil;
}
uint32
runtime_rnd(uint32 n, uint32 m)
{
uint32 r;
if(m > maxround)
m = maxround;
r = n % m;
if(r)
n += m-r;
return n;
}
int32
runtime_atoi(byte *p)
{
int32 n;
n = 0;
while('0' <= *p && *p <= '9')
n = n*10 + *p++ - '0';
return n;
}
uint32
runtime_fastrand1(void)
{
uint32 x;
x = fastrand;
x += x;
if(x & 0x80000000L)
x ^= 0x88888eefUL;
fastrand = x;
return x;
}
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