feature: now we allow up to 16 decimal places in JSON number encoding via cjson.encode_number_precision().2.1.0.3

thanks lordnynex for the patch in #4.

Test cases for changing precision

3 files changed, 17 insertions, 2 deletions

diff --git a/lua_cjson.c b/lua_cjson.c
index 97f2350..5ff3bf7 100644
--- a/lua_cjson.c
+++ b/lua_cjson.c
@@ -299,7 +299,7 @@ static int json_cfg_encode_number_precision(lua_State *l)
 {
     json_config_t *cfg = json_arg_init(l, 1);
 
-    return json_integer_option(l, 1, &cfg->encode_number_precision, 1, 14);
+    return json_integer_option(l, 1, &cfg->encode_number_precision, 1, 16);
 }
 
 /* Configures how to treat empty table when encode lua table */
diff --git a/tests/agentzh.t b/tests/agentzh.t
index e65288f..0b546ff 100644
--- a/tests/agentzh.t
+++ b/tests/agentzh.t
@@ -50,3 +50,18 @@ print(cjson.encode(b))
 --- out
 ["a=1&b=2"]
 
+
+
+=== TEST 5: default and max precision
+--- lua
+local math = require "math"
+local cjson = require "cjson"
+local double = math.pow(2, 53)
+print(cjson.encode(double))
+cjson.encode_number_precision(16)
+print(cjson.encode(double))
+print(string.format("%16.0f", cjson.decode("9007199254740992")))
+--- out
+9.007199254741e+15
+9007199254740992
+9007199254740992
diff --git a/tests/test.lua b/tests/test.lua
index b8fce84..c96dd3d 100755
--- a/tests/test.lua
+++ b/tests/test.lua
@@ -361,7 +361,7 @@ local cjson_tests = {
     -- Function is listed as '?' due to pcall
     { "Set encode_number_precision(0) [throw error]",
       json.encode_number_precision, { 0 },
-      false, { "bad argument #1 to '?' (expected integer between 1 and 14)" } },
+      false, { "bad argument #1 to '?' (expected integer between 1 and 16)" } },
     { "Set encode_number_precision(\"five\") [throw error]",
       json.encode_number_precision, { "five" },
       false, { "bad argument #1 to '?' (number expected, got string)" } },