From 14a6924d2fe27083556e323ec7efdee7567d3a4f Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Wed, 26 Aug 2026 21:02:53 +0300
Subject: add simple string buffer

+ Has short-string optimization, which seems to trigger an erroneous
  warning about out-of-bounds writes to unions. Should probably report
  upstream.
---
 tests/sp.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 tests/sp.c

(limited to 'tests/sp.c')

diff --git a/tests/sp.c b/tests/sp.c
new file mode 100644
index 0000000..369e376
--- /dev/null
+++ b/tests/sp.c
@@ -0,0 +1,134 @@
+#include "test.h"
+
+/* all optional */
+#define SP_MALLOC mallocc
+#define SP_REALLOC reallocc
+#define SP_FREE free
+#include <conts/sp.h>
+
+/* including default name is fine */
+#include <conts/sp.h>
+
+/* separate string type, can be defined in addition to the default type. The
+ * default type can be included multiple times, but specially-named types
+ * cannot. */
+#define SP_NAME second
+#define SP_MALLOC mallocc
+#define SP_REALLOC reallocc
+#define SP_FREE free
+#include <conts/sp.h>
+
+int main()
+{
+#if defined(COVERAGE)
+	assert(!covsrv_init());
+	atexit(covsrv_destroy);
+#endif
+
+	struct sp sp = sp_create();
+
+	/* should be in static buffer, cannot fail
+	 * (though the user should probably assume that appending can always
+	 * fail) */
+	assert(!sp_append_str(&sp, "123"));
+
+	/* don't use sp.b directly, prefer sp_str, but this is fine for testing */
+	assert(strcmp(sp.b, "123") == 0);
+
+	/* test static iteration */
+	foreach(sp, c, &sp) {
+		switch (c.i) {
+		case 0: assert(*c.p == '1'); break;
+		case 1: assert(*c.p == '2'); break;
+		case 2: assert(*c.p == '3'); break;
+		default: assert(0 && "weird iteration");
+		}
+	}
+
+	/* now we should switch over to the dynamic buffer, as we have more
+	 * characters than can fit in any regular pointer type (3 for 32bit, 7
+	 * for 64 bit, 15 for stuff like Cheri), might fail */
+	if (sp_append_str(&sp, "4567890ABCDEFG")) {
+		fprintf(stderr, "failed appending to string buffer");
+		sp_destroy(&sp);
+		return -1;
+	}
+
+	/* same deal, check that we're using the dynamic buffer */
+	assert(strcmp(sp.p, "1234567890ABCDEFG") == 0);
+
+	/* test dynamic iteration */
+	foreach(sp, c, &sp) {
+		switch (c.i) {
+		case  0: assert(*c.p == '1'); break;
+		case  1: assert(*c.p == '2'); break;
+		case  2: assert(*c.p == '3'); break;
+		case  3: assert(*c.p == '4'); break;
+		case  4: assert(*c.p == '5'); break;
+		case  5: assert(*c.p == '6'); break;
+		case  6: assert(*c.p == '7'); break;
+		case  7: assert(*c.p == '8'); break;
+		case  8: assert(*c.p == '9'); break;
+		case  9: assert(*c.p == '0'); break;
+		case 10: assert(*c.p == 'A'); break;
+		case 11: assert(*c.p == 'B'); break;
+		case 12: assert(*c.p == 'C'); break;
+		case 13: assert(*c.p == 'D'); break;
+		case 14: assert(*c.p == 'E'); break;
+		case 15: assert(*c.p == 'F'); break;
+		case 16: assert(*c.p == 'G'); break;
+		case 17: assert(*c.p == 'H'); break;
+		default: assert(0 && "weird iteration");
+		}
+	}
+
+	/* 'reset' string */
+	sp_destroy(&sp);
+
+	/* test formatting functions */
+	sp = sp_create();
+
+	/* static formatting */
+	for (int i = 1; i < 4; ++i)
+		assert(!sp_append_fmt(&sp, "%d", i));
+
+	assert(strcmp(sp.b, "123") == 0);
+
+	/* dynamic formatting */
+	for (int i = 4; i < 15; ++i)
+	if (sp_append_fmt(&sp, "%d", i)) {
+		fprintf(stderr, "failed formatting input\n");
+		sp_destroy(&sp);
+		return -1;
+	}
+
+	assert(strcmp(sp.p, "1234567891011121314") == 0);
+	sp_destroy(&sp);
+
+	/* do some benchmarking, oh yeah! */
+	struct second sec = second_create();
+	for (int i = 0; i < ITER; ++i)
+	if (second_append_str(&sec, "BENCHMARK, FUCK YEAH\n")) {
+		fprintf(stderr, "failed when stressing append\n");
+		second_destroy(&sec);
+		return -1;
+	}
+
+	/* hmm, come to think of it, foreach_line or something along those lines
+	 * might be pretty neat? */
+
+	second_destroy(&sec);
+
+	sec = second_create();
+	for (int i = 0; i < ITER; ++i)
+	if (second_append_fmt(&sec, "I'm in iteration %d!\n", i)) {
+		fprintf(stderr, "failed when stressing fmt\n");
+		second_destroy(&sec);
+		return -1;
+	}
+
+	second_destroy(&sec);
+
+	/* all done! */
+	return 0;
+}
-- 
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