From 59a33a2f35b409655c95c5046c80b95e9c3532bb Mon Sep 17 00:00:00 2001
From: Sho Nakatani <lay.sakura@gmail.com>
Date: Tue, 29 Mar 2022 11:01:25 +0900
Subject: [PATCH] feat: add spring_config_toml

---
 Cargo.toml          |  4 ++--
 c_example/example.c |  4 +++-
 springql.h          | 15 +++++++++++++++
 src/lib.rs          | 22 ++++++++++++++++++++++
 4 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index d1d109a..a4a90f8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "springql-client-c"
-version = "0.3.0"
+version = "0.3.1"
 
 authors = ["Sho Nakatani <lay.sakura@gmail.com>"]
 license = "MIT OR Apache-2.0"
@@ -15,6 +15,6 @@ name = "springql_client"
 cbindgen = "0.21"
 
 [dependencies]
-springql-core = "0.3"
+springql-core = "0.3.1"
 
 log = "0.4"
diff --git a/c_example/example.c b/c_example/example.c
index 86bca72..97033d7 100644
--- a/c_example/example.c
+++ b/c_example/example.c
@@ -106,7 +106,9 @@ int main()
 {
     SpringErrno ret;
 
-    SpringConfig *config = spring_config_default();
+    SpringConfig *config = spring_config_toml(
+        "[memory]\n"
+        "upper_limit_bytes = 1_000_000\n");
     assert_not_null(config);
 
     SpringPipeline *pipeline = spring_open(config);
diff --git a/springql.h b/springql.h
index 94d6e67..e1ef44f 100644
--- a/springql.h
+++ b/springql.h
@@ -44,9 +44,24 @@ typedef void *SpringRow;
 
 /**
  * See: springql_core::api::spring_config_default
+ *
+ * Returned value is not modifiable (it is just a void pointer).
+ * If you would like to change the default configuration, use `spring_config_toml()` instead.
  */
 SpringConfig *spring_config_default(void);
 
+/**
+ * See: springql_core::api::spring_config_default
+ *
+ * Returned value is not modifiable (it is just a void pointer).
+ * If you would like to change the default configuration, use `spring_config_toml()` instead.
+ *
+ * # Safety
+ *
+ * This function is unsafe because it uses raw pointer.
+ */
+SpringConfig *spring_config_toml(const char *overwrite_config_toml);
+
 /**
  * # Returns
  *
diff --git a/src/lib.rs b/src/lib.rs
index 90fc0cb..180bcf6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -36,6 +36,9 @@ pub struct SpringPipeline(*mut c_void);
 pub struct SpringRow(*mut c_void);
 
 /// See: springql_core::api::spring_config_default
+///
+/// Returned value is not modifiable (it is just a void pointer).
+/// If you would like to change the default configuration, use `spring_config_toml()` instead.
 #[no_mangle]
 pub extern "C" fn spring_config_default() -> *mut SpringConfig {
     let config = springql_core::spring_config_default();
@@ -44,6 +47,25 @@ pub extern "C" fn spring_config_default() -> *mut SpringConfig {
     })))
 }
 
+/// See: springql_core::api::spring_config_default
+///
+/// Returned value is not modifiable (it is just a void pointer).
+/// If you would like to change the default configuration, use `spring_config_toml()` instead.
+///
+/// # Safety
+///
+/// This function is unsafe because it uses raw pointer.
+#[no_mangle]
+pub unsafe extern "C" fn spring_config_toml(
+    overwrite_config_toml: *const c_char,
+) -> *mut SpringConfig {
+    let s = { CStr::from_ptr(overwrite_config_toml) };
+    let s = s.to_str().expect("failed to parse TOML string into UTF-8");
+
+    let config = springql_core::spring_config_toml(s).expect("failed to parse TOML config");
+    Box::into_raw(Box::new(SpringConfig(mem::transmute(Box::new(config)))))
+}
+
 /// # Returns
 ///
 /// - `0`: if there are no recent errors.