lua-hooks/ext/perf/luaoslib.c in immunio-1.1.2 vs lua-hooks/ext/perf/luaoslib.c in immunio-1.1.5

@@ -1,20 +1,73 @@
 #include <time.h>
+#include <string.h>
 
 #define lib_os_c
 #define LUA_LIB
 
+/*
+** list of valid conversion specifiers for the 'strftime' function
+*/
+#if !defined(LUA_STRFTIMEOPTIONS)
+
+#if !defined(LUA_USE_POSIX)
+#define LUA_STRFTIMEOPTIONS     { "aAbBcdHIjmMpSUwWxXyYz%", "" }
+#else
+#define LUA_STRFTIMEOPTIONS \
+        { "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
+          "", "E", "cCxXyY",  \
+          "O", "deHImMSuUVwWy" }
+#endif
+
+#endif
+
+/*
+** By default, Lua uses gmtime/localtime, except when POSIX is available,
+** where it uses gmtime_r/localtime_r
+*/
+#if defined(LUA_USE_GMTIME_R)
+
+#define l_gmtime(t,r)           gmtime_r(t,r)
+#define l_localtime(t,r)        localtime_r(t,r)
+
+#elif !defined(l_gmtime)
+
+#define l_gmtime(t,r)           ((void)r, gmtime(t))
+#define l_localtime(t,r)        ((void)r, localtime(t))
+
+#endif
+
 #include "lua.h"
 #include "lauxlib.h"
 #include "lj_err.h"
 
 static int os_clock(lua_State *L) {
   lua_Number clk = ((lua_Number)clock())*(1.0/(lua_Number)CLOCKS_PER_SEC);
   lua_pushnumber(L, clk);
   return 1;
 }
 
+/*
+** {======================================================
+** Time/Date operations
+** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
+**   wday=%w+1, yday=%j, isdst=? }
+** =======================================================
+*/
+
+static void setfield (lua_State *L, const char *key, int value) {
+  lua_pushinteger(L, value);
+  lua_setfield(L, -2, key);
+}
+
+static void setboolfield (lua_State *L, const char *key, int value) {
+  if (value < 0)  /* undefined? */
+    return;  /* does not set field */
+  lua_pushboolean(L, value);
+  lua_setfield(L, -2, key);
+}
+
 static int getboolfield(lua_State *L, const char *key) {
   int res;
   lua_getfield(L, -1, key);
   res = lua_isnil(L, -1) ? -1 : lua_toboolean(L, -1);
   lua_pop(L, 1);
@@ -33,10 +86,78 @@
   }
   lua_pop(L, 1);
   return res;
 }
 
+static const char *checkoption (lua_State *L, const char *conv, char *buff) {
+  static const char *const options[] = LUA_STRFTIMEOPTIONS;
+  unsigned int i;
+  for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {
+    if (*conv != '\0' && strchr(options[i], *conv) != NULL) {
+      buff[1] = *conv;
+      if (*options[i + 1] == '\0') {  /* one-char conversion specifier? */
+        buff[2] = '\0';  /* end buffer */
+        return conv + 1;
+      }
+      else if (*(conv + 1) != '\0' &&
+               strchr(options[i + 1], *(conv + 1)) != NULL) {
+        buff[2] = *(conv + 1);  /* valid two-char conversion specifier */
+        buff[3] = '\0';  /* end buffer */
+        return conv + 2;
+      }
+    }
+  }
+  luaL_argerror(L, 1,
+    lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
+  return conv;  /* to avoid warnings */
+}
+
+static int os_date (lua_State *L) {
+  const char *s = luaL_optstring(L, 1, "%c");
+  time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
+  struct tm tmr, *stm;
+  if (*s == '!') {  /* UTC? */
+    stm = l_gmtime(&t, &tmr);
+    s++;  /* skip `!' */
+  }
+  else
+    stm = l_localtime(&t, &tmr);
+  if (stm == NULL)  /* invalid date? */
+    lua_pushnil(L);
+  else if (strcmp(s, "*t") == 0) {
+    lua_createtable(L, 0, 9);  /* 9 = number of fields */
+    setfield(L, "sec", stm->tm_sec);
+    setfield(L, "min", stm->tm_min);
+    setfield(L, "hour", stm->tm_hour);
+    setfield(L, "day", stm->tm_mday);
+    setfield(L, "month", stm->tm_mon+1);
+    setfield(L, "year", stm->tm_year+1900);
+    setfield(L, "wday", stm->tm_wday+1);
+    setfield(L, "yday", stm->tm_yday+1);
+    setboolfield(L, "isdst", stm->tm_isdst);
+  }
+  else {
+    char cc[4];
+    luaL_Buffer b;
+    cc[0] = '%';
+    luaL_buffinit(L, &b);
+    while (*s) {
+      if (*s != '%')  /* no conversion specifier? */
+        luaL_addchar(&b, *s++);
+      else {
+        size_t reslen;
+        char buff[200];  /* should be big enough for any conversion result */
+        s = checkoption(L, s + 1, cc);
+        reslen = strftime(buff, sizeof(buff), cc, stm);
+        luaL_addlstring(&b, buff, reslen);
+      }
+    }
+    luaL_pushresult(&b);
+  }
+  return 1;
+}
+
 static int os_time(lua_State *L) {
   time_t t;
   if (lua_isnoneornil(L, 1)) {  /* called without args? */
     t = time(NULL);  /* get current time */
   } else {
@@ -59,23 +180,24 @@
   return 1;
 }
 
 static int os_difftime(lua_State *L) {
   lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
-			     (time_t)(luaL_optnumber(L, 2, (lua_Number)0))));
+           (time_t)(luaL_optnumber(L, 2, (lua_Number)0))));
   return 1;
 }
 
 static const luaL_Reg libluaos[] = {
   {"clock", os_clock},
   {"time", os_time},
   {"difftime", os_difftime},
+  {"date", os_date},
 
   {NULL, NULL}
 };
 
 int
 luaopen_luaos(lua_State *L) {
-  luaL_checkversion(L);
+//  luaL_checkversion(L);
   luaL_register(L, "perf", libluaos);
   return 1;
 }