refactor localtime functions to use time crate

lint fixes

build/emtests.rs

@@ -11,11 +11,12 @@ use std::process::Command;
 static BANNER: &str = "// Rust test file autogenerated with cargo build (build/emtests.rs).
 // Please do NOT modify it by hand, as it will be reseted on next build.\n";
 
-const TESTS: [&str; 4] = [
+const TESTS: [&str; 5] = [
     "emtests/env.c",
     "emtests/puts.c",
     "emtests/printf.c",
     "emtests/clock_gettime.c",
+    "emtests/localtime.c",
 ];
 
 pub fn compile(file: &str) -> String {

emtests/localtime.c

@@ -2,19 +2,14 @@
 #include <time.h>
 
 int main (int argc, char *argv[]) {
-    printf("Hello wasmer!\n");
     time_t rawtime;
     struct tm *info;
-    char buffer[80];
-
     time( &rawtime );
-
     info = localtime( &rawtime );
-
-    printf("Almost!\n");
-    printf("Current local time and date: %s\n", asctime(info));
-    printf("Done!\n");
-
+    struct tm info2;
+    time (&rawtime );
+    struct tm *p = localtime_r(&rawtime, &info2);
+    printf("localtime\n");
     return(0);
 }
 

emtests/localtime.output

@@ -0,0 +1 @@
+localtime

src/apis/emscripten/time.rs

@@ -74,17 +74,15 @@ pub extern "C" fn _difftime(t0: u32, t1: u32) -> c_int {
 
 #[repr(C)]
 struct guest_tm {
-    pub tm_sec: c_int,    // 0
-    pub tm_min: c_int,    // 4
-    pub tm_hour: c_int,   // 8
-    pub tm_mday: c_int,   // 12
-    pub tm_mon: c_int,    // 16
-    pub tm_year: c_int,   // 20
-    pub tm_wday: c_int,   // 24
-    pub tm_yday: c_int,   // 28
-    pub tm_isdst: c_int,  // 32
-    pub tm_gmtoff: c_int, // 36
-    pub tm_zone: c_int,   // 40
+    pub tm_sec: c_int,   // 0
+    pub tm_min: c_int,   // 4
+    pub tm_hour: c_int,  // 8
+    pub tm_mday: c_int,  // 12
+    pub tm_mon: c_int,   // 16
+    pub tm_year: c_int,  // 20
+    pub tm_wday: c_int,  // 24
+    pub tm_yday: c_int,  // 28
+    pub tm_isdst: c_int, // 32
 }
 
 /// emscripten: _tvset
@@ -155,21 +153,24 @@ pub extern "C" fn _localtime(time_p: u32, instance: &mut Instance) -> c_int {
     // NOTE: emscripten seems to want tzset() called in this function
     //      https://stackoverflow.com/questions/19170721/real-time-awareness-of-timezone-change-in-localtime-vs-localtime-r
 
+    let timespec = unsafe {
+        let mut time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
+        let seconds = *time_p_addr.clone();
+        time::Timespec::new(seconds, 0)
+    };
+    let result_tm = time::at(timespec);
+
     unsafe {
-        let time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
-        let result_tm = &*localtime(time_p_addr);
         let tm_struct_offset = (instance.emscripten_data.as_ref().unwrap().malloc)(
             mem::size_of::<guest_tm>() as _,
             instance,
         );
-
         let tm_struct_ptr = instance.memory_offset_addr(0, tm_struct_offset as _) as *mut guest_tm;
         // debug!(
         //     ">>>>>>> time = {}, {}, {}, {}, {}, {}, {}, {}",
         //     result_tm.tm_sec, result_tm.tm_min, result_tm.tm_hour, result_tm.tm_mday,
         //     result_tm.tm_mon, result_tm.tm_year, result_tm.tm_wday, result_tm.tm_yday,
         // );
-
         (*tm_struct_ptr).tm_sec = result_tm.tm_sec;
         (*tm_struct_ptr).tm_min = result_tm.tm_min;
         (*tm_struct_ptr).tm_hour = result_tm.tm_hour;
@@ -179,8 +180,6 @@ pub extern "C" fn _localtime(time_p: u32, instance: &mut Instance) -> c_int {
         (*tm_struct_ptr).tm_wday = result_tm.tm_wday;
         (*tm_struct_ptr).tm_yday = result_tm.tm_yday;
         (*tm_struct_ptr).tm_isdst = result_tm.tm_isdst;
-        (*tm_struct_ptr).tm_gmtoff = result_tm.tm_gmtoff as i32;
-        (*tm_struct_ptr).tm_zone = copy_cstr_into_wasm(instance, result_tm.tm_zone) as i32;
 
         tm_struct_offset as _
     }
@@ -194,30 +193,18 @@ pub extern "C" fn _localtime_r(time_p: u32, result: u32, instance: &mut Instance
 
     unsafe {
         let time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
-        let result_addr = instance.memory_offset_addr(0, result as _) as *mut guest_tm;
+        let seconds = *time_p_addr.clone();
+        let timespec = time::Timespec::new(seconds, 0);
+        let result_tm = time::at(timespec);
 
-        let mut result_tm = tm {
-            tm_sec: (*result_addr).tm_sec,
-            tm_min: (*result_addr).tm_min,
-            tm_hour: (*result_addr).tm_hour,
-            tm_mday: (*result_addr).tm_mday,
-            tm_mon: (*result_addr).tm_mon,
-            tm_year: (*result_addr).tm_year,
-            tm_wday: (*result_addr).tm_wday,
-            tm_yday: (*result_addr).tm_yday,
-            tm_isdst: (*result_addr).tm_isdst,
-            tm_gmtoff: (*result_addr).tm_gmtoff as _,
-            tm_zone: instance.memory_offset_addr(0, (*result_addr).tm_zone as _) as _,
-        };
-
-        localtime_r(time_p_addr, &mut result_tm);
-        // let tm_struct = result_tm;
         // debug!(
         //     ">>>>>>> time = {}, {}, {}, {}, {}, {}, {}, {}",
         //     result_tm.tm_sec, result_tm.tm_min, result_tm.tm_hour, result_tm.tm_mday,
         //     result_tm.tm_mon, result_tm.tm_year, result_tm.tm_wday, result_tm.tm_yday,
         // );
 
+        let result_addr = instance.memory_offset_addr(0, result as _) as *mut guest_tm;
+
         (*result_addr).tm_sec = result_tm.tm_sec;
         (*result_addr).tm_min = result_tm.tm_min;
         (*result_addr).tm_hour = result_tm.tm_hour;
@@ -227,8 +214,6 @@ pub extern "C" fn _localtime_r(time_p: u32, result: u32, instance: &mut Instance
         (*result_addr).tm_wday = result_tm.tm_wday;
         (*result_addr).tm_yday = result_tm.tm_yday;
         (*result_addr).tm_isdst = result_tm.tm_isdst;
-        (*result_addr).tm_gmtoff = result_tm.tm_gmtoff as _;
-        (*result_addr).tm_zone = copy_cstr_into_wasm(instance, result_tm.tm_zone) as _;
 
         result as _
     }

src/emtests/localtime.rs

@@ -0,0 +1,9 @@
+#[test]
+fn test_localtime() {
+    assert_emscripten_output!(
+        "../../emtests/localtime.wasm",
+        "localtime",
+        vec![],
+        "../../emtests/localtime.output"
+    );
+}

src/emtests/mod.rs

@@ -6,5 +6,6 @@
 mod _common;
 mod clock_gettime;
 mod env;
+mod localtime;
 mod printf;
 mod puts;