From c7b10ceadb1a78e7480d281444a31ae2a7dc1b05 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Fri, 06 May 2016 23:25:16 +0000
Subject: [PATCH] so much need to commit
---
src/utils.c | 61 ++++++++++++++++++++++++++++++
1 files changed, 61 insertions(+), 0 deletions(-)
diff --git a/src/utils.c b/src/utils.c
index 398d18a..1541e05 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -273,6 +273,42 @@
return line;
}
+int read_int(int fd)
+{
+ int n = 0;
+ int next = read(fd, &n, sizeof(int));
+ if(next <= 0) return -1;
+ return n;
+}
+
+void write_int(int fd, int n)
+{
+ int next = write(fd, &n, sizeof(int));
+ if(next <= 0) error("read failed");
+}
+
+int read_all_fail(int fd, char *buffer, size_t bytes)
+{
+ size_t n = 0;
+ while(n < bytes){
+ int next = read(fd, buffer + n, bytes-n);
+ if(next <= 0) return 1;
+ n += next;
+ }
+ return 0;
+}
+
+int write_all_fail(int fd, char *buffer, size_t bytes)
+{
+ size_t n = 0;
+ while(n < bytes){
+ size_t next = write(fd, buffer + n, bytes-n);
+ if(next <= 0) return 1;
+ n += next;
+ }
+ return 0;
+}
+
void read_all(int fd, char *buffer, size_t bytes)
{
size_t n = 0;
@@ -441,6 +477,19 @@
}
}
+int sample_array(float *a, int n)
+{
+ float sum = sum_array(a, n);
+ scale_array(a, n, 1./sum);
+ float r = rand_uniform(0, 1);
+ int i;
+ for(i = 0; i < n; ++i){
+ r = r - a[i];
+ if (r <= 0) return i;
+ }
+ return n-1;
+}
+
int max_index(float *a, int n)
{
if(n <= 0) return -1;
@@ -495,6 +544,18 @@
}
*/
+size_t rand_size_t()
+{
+ return ((size_t)(rand()&0xff) << 56) |
+ ((size_t)(rand()&0xff) << 48) |
+ ((size_t)(rand()&0xff) << 40) |
+ ((size_t)(rand()&0xff) << 32) |
+ ((size_t)(rand()&0xff) << 24) |
+ ((size_t)(rand()&0xff) << 16) |
+ ((size_t)(rand()&0xff) << 8) |
+ ((size_t)(rand()&0xff) << 0);
+}
+
float rand_uniform(float min, float max)
{
return ((float)rand()/RAND_MAX * (max - min)) + min;
--
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