Min/Max delay for Light and Temperature

[android-x86/hardware-intel-libsensors.git] / utils.c

diff --git a/utils.c b/utils.c
index d5ec492..fc03635 100644 (file)
--- a/utils.c
+++ b/utils.c
@@ -153,6 +153,40 @@ int sysfs_read_str(const char path[PATH_MAX], char *buf, int buf_len)
 }
 
 
+int sysfs_write_float(const char path[PATH_MAX], float value)
+{
+       int ret;
+       int fd;
+       int len;
+       char buf[20];
+
+       len = snprintf(buf, sizeof(buf), "%g", value);
+
+       if (!path[0] || len <= 0) {
+               ALOGE("Unexpected condition in sysfs_write_float\n");
+               return -1;
+       }
+
+       fd = open(path, O_WRONLY);
+
+       if (fd == -1) {
+               ALOGV("Cannot open %s (%s)\n", path, strerror(errno));
+               return -1;
+       }
+
+       ret = write(fd, buf, len);
+
+       if (ret != len) {
+               ALOGW("Cannot write %s (%d bytes) to %s (%s)\n", buf, len, path,
+                     strerror(errno));
+       }
+
+       close(fd);
+
+       return ret;
+}
+
+
 int sysfs_read_float(const char path[PATH_MAX], float *value)
 {
        int fd;
@@ -182,7 +216,7 @@ int sysfs_read_float(const char path[PATH_MAX], float *value)
 
        *value = (float) strtod(buf, NULL);
 
-       ALOGV("Read %f from %s\n", *value, path);
+       ALOGV("Read %g from %s\n", *value, path);
 
        return 0;
 }
@@ -220,12 +254,23 @@ int decode_type_spec(     const char type_buf[MAX_TYPE_SPEC_LEN],
        return storagebits / 8;
 }
 
+int64_t load_timestamp(struct timespec *ts)
+{
+       clock_gettime(CLOCK_MONOTONIC, ts);
+
+       return 1000000000LL * ts->tv_sec + ts->tv_nsec;
+}
 
 int64_t get_timestamp(void)
 {
        struct timespec ts = {0};
 
-       clock_gettime(CLOCK_MONOTONIC, &ts);
+       return load_timestamp(&ts);
+}
 
-       return 1000000000LL * ts.tv_sec + ts.tv_nsec;
+void set_timestamp(struct timespec *out, int64_t target_ns)
+{
+       out->tv_sec  = target_ns / 1000000000LL;
+       out->tv_nsec = target_ns % 1000000000LL;
 }
+