From 13cc6fb80cd59865fec529692ceb7cb134ab5fe2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= <hugo@lysator.liu.se>
Date: Wed, 28 Feb 2024 11:29:18 +0100
Subject: [PATCH] Add sqlite extension for generating uuid's.
---
Makefile | 11 +++++++++++
sqlite-uuid.c | 35 +++++++++++++++++++++++++++++++++++
test.sql | 2 ++
3 files changed, 48 insertions(+)
create mode 100644 Makefile
create mode 100644 sqlite-uuid.c
create mode 100644 test.sql
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3f202e5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,11 @@
+libs = sqlite3 uuid
+CFLAGS = -Wall -pedantic -std=c2x -fPIC \
+ -ggdb \
+ $(shell pkg-config --cflags $(libs))
+LDLIBS = $(shell pkg-config --libs $(libs))
+
+C_FILES = sqlite-uuid.c
+O_FILES = $(C_FILES:%.c=%.o)
+
+sqlite-uuid.so: $(O_FILES)
+ $(CC) -shared -o $@ $^ $(LDLIBS)
diff --git a/sqlite-uuid.c b/sqlite-uuid.c
new file mode 100644
index 0000000..b9a6696
--- /dev/null
+++ b/sqlite-uuid.c
@@ -0,0 +1,35 @@
+#include <sqlite3ext.h>
+SQLITE_EXTENSION_INIT1
+#include <uuid.h>
+
+static void sqlite_uuid(sqlite3_context *context, int argc, sqlite3_value **argv) {
+ uuid_t uuid;
+ uuid_generate_random(uuid);
+
+ char str[37];
+ uuid_unparse(uuid, &str[0]);
+
+ sqlite3_result_text(context, str, 37, SQLITE_TRANSIENT);
+
+ uuid_clear(uuid);
+}
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+int sqlite3_extension_init (
+ sqlite3 *db,
+ char **pzErrMsg,
+ const sqlite3_api_routines *pApi
+) {
+ int rc = SQLITE_OK;
+ SQLITE_EXTENSION_INIT2(pApi);
+
+ (void) pzErrMsg;
+
+ rc = sqlite3_create_function(db, "uuid", 0,
+ SQLITE_UTF8|SQLITE_INNOCUOUS,
+ 0, sqlite_uuid, 0, 0);
+
+ return rc;
+}
diff --git a/test.sql b/test.sql
new file mode 100644
index 0000000..da30454
--- /dev/null
+++ b/test.sql
@@ -0,0 +1,2 @@
+.load sqlite-uuid
+SELECT uuid();
--
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