From c660d1ec1e7d8643cab5dfeef5561ef58da3ad78 Mon Sep 17 00:00:00 2001
From: Ivar Fatland <fatland99@hotmail.com>
Date: Sat, 13 Dec 2025 16:16:25 +0100
Subject: [PATCH] update builder to always clear after retrieving output

---
 cig.h            | 6 +++---
 string_builder.c | 6 ++++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/cig.h b/cig.h
index cd68e38..edbbcab 100644
--- a/cig.h
+++ b/cig.h
@@ -325,7 +325,7 @@ typedef struct string_builder {
 } string_builder_t;
 
 string_builder_t sb_create(allocator_t builder_allocator);
-// assumes the provided string will live until sb_build is called.
+// assumes the provided string will live until sb_build_and_clear is called.
 void sb_add_string(string_builder_t *this, const char *string);
 void sb_add_i64(string_builder_t *this, int64_t i64);
 void sb_add_i32(string_builder_t *this, int32_t i32);
@@ -336,8 +336,8 @@ void sb_add_u32(string_builder_t *this, uint32_t u32);
 void sb_add_u16(string_builder_t *this, uint16_t u16);
 void sb_add_u8(string_builder_t *this, uint8_t u8);
 void sb_add_substring(string_builder_t *this, const char *string, size_t substring_length);
-const char *sb_build(string_builder_t *this, allocator_t output_allocator);
-void sb_fprint(string_builder_t *this, FILE *dest);
+const char *sb_build_and_clear(string_builder_t *this, allocator_t output_allocator);
+void sb_fprint_and_clear(string_builder_t *this, FILE *dest);
 
 #ifdef CIG_IMPL
 
diff --git a/string_builder.c b/string_builder.c
index 9860521..84ff95c 100644
--- a/string_builder.c
+++ b/string_builder.c
@@ -91,7 +91,7 @@ void sb_add_substring(string_builder_t *this, const char *string, size_t substri
 	sb_add_string(this, buffer);
 }
 
-const char *sb_build(
+const char *sb_build_and_clear(
 	string_builder_t *this,
 	allocator_t output_allocator
 ) {
@@ -123,7 +123,7 @@ const char *sb_build(
 	return buffer;
 }
 
-void sb_fprint(string_builder_t *this, FILE *dest) {
+void sb_fprint_and_clear(string_builder_t *this, FILE *dest) {
 	for (
 		string_builder_node_t *node = this->head;
 		node != NULL;
@@ -131,4 +131,6 @@ void sb_fprint(string_builder_t *this, FILE *dest) {
 	) {
 		fprintf(dest, "%s", node->string);
 	}
+	this->head = NULL;
+	this->tail = NULL;
 }