diff -r 2e6e9d9f2159 -r c9d008861178 tests/test_printf.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test_printf.cpp	Wed Feb 08 20:26:26 2023 +0100
@@ -0,0 +1,248 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "cx/printf.h"
+#include "cx/buffer.h"
+
+#include <gtest/gtest.h>
+#include "util_allocator.h"
+
+class PrintfFixture : public ::testing::Test {
+protected:
+    std::string buf;
+    CxTestingAllocator alloc;
+
+    void TearDown() override {
+        buf.clear();
+        ASSERT_TRUE(alloc.verify());
+    }
+
+    static size_t write_func(
+            void const *src,
+            size_t esize,
+            size_t ecount,
+            void *target
+    ) {
+        auto str = reinterpret_cast<char const *>(src);
+        auto buf = reinterpret_cast<std::string *>(target);
+        EXPECT_EQ(esize, 1);
+        EXPECT_EQ(strlen(str), ecount);
+        *buf = str;
+        return ecount;
+    }
+};
+
+
+TEST_F(PrintfFixture, BPrintf) {
+    CxBuffer buf;
+    cxBufferInit(&buf, nullptr, 64, &alloc, 0);
+
+    auto r = cx_bprintf(&buf, "This %s aged %u years in a %2XSK.", "Test", 10, 0xca);
+    EXPECT_EQ(r, 34);
+    EXPECT_EQ(buf.size, 34);
+    buf.space[r] = '\0';
+    EXPECT_STREQ(buf.space, "This Test aged 10 years in a CASK.");
+
+    cxBufferDestroy(&buf);
+}
+
+TEST_F(PrintfFixture, FPrintf) {
+    auto h = "Hello";
+    size_t r;
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "teststring");
+    EXPECT_EQ(r, 10);
+    EXPECT_EQ(buf, "teststring");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "[%10s]", h);
+    EXPECT_EQ(r, 12);
+    EXPECT_EQ(buf, "[     Hello]");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "[%-10s]", h);
+    EXPECT_EQ(r, 12);
+    EXPECT_EQ(buf, "[Hello     ]");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "[%*s]", 10, h);
+    EXPECT_EQ(r, 12);
+    EXPECT_EQ(buf, "[     Hello]");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "[%-10.*s]", 4, h);
+    EXPECT_EQ(r, 12);
+    EXPECT_EQ(buf, "[Hell      ]");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "[%-*.*s]", 10, 4, h);
+    EXPECT_EQ(r, 12);
+    EXPECT_EQ(buf, "[Hell      ]");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "%c", 'A');
+    EXPECT_EQ(r, 1);
+    EXPECT_EQ(buf, "A");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "%i %d %.6i %i %.0i %+i %i", 1, 2, 3, 0, 0, 4, -4);
+    EXPECT_EQ(r, 19);
+    EXPECT_EQ(buf, "1 2 000003 0  +4 -4");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "%x %x %X %#x", 5, 10, 10, 6);
+    EXPECT_EQ(r, 9);
+    EXPECT_EQ(buf, "5 a A 0x6");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "%o %#o %#o", 10, 10, 4);
+    EXPECT_EQ(r, 9);
+    EXPECT_EQ(buf, "12 012 04");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "%05.2f %.2f %5.2f", 1.5, 1.5, 1.5);
+    EXPECT_EQ(r, 16);
+    EXPECT_EQ(buf, "01.50 1.50  1.50");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "'%*c'", 5, 'x');
+    EXPECT_EQ(r, 7);
+    EXPECT_EQ(buf, "'    x'");
+
+    r = cx_fprintf(&buf, PrintfFixture::write_func, "'%*c'", -5, 'x');
+    EXPECT_EQ(r, 7);
+    EXPECT_EQ(buf, "'x    '");
+}
+
+TEST_F(PrintfFixture, BPrintfLargeString) {
+    CxBuffer buf;
+    cxBufferInit(&buf, nullptr, 64, &alloc, CX_BUFFER_AUTO_EXTEND);
+
+    auto aaa = std::string(512, 'a');
+    auto bbb = std::string(512, 'b');
+
+    auto r = cx_bprintf(&buf, "After %s comes %s.", aaa.data(), bbb.data());
+    EXPECT_EQ(r, 1038);
+    EXPECT_EQ(buf.size, 1038);
+    cxBufferPut(&buf, 0);
+    EXPECT_EQ(buf.space, std::string("After ") + aaa + " comes " + bbb + ".");
+
+    cxBufferDestroy(&buf);
+}
+
+TEST_F(PrintfFixture, BPrintfNoCap) {
+    CxBuffer buf;
+    char space[20];
+    memset(space, 'a', 20);
+    cxBufferInit(&buf, space, 16, &alloc, 0);
+
+    auto r = cx_bprintf(&buf, "Hello %s with more than %d chars.", "string", 16);
+    EXPECT_EQ(r, 16);
+    EXPECT_EQ(buf.size, 16);
+    EXPECT_EQ(0, memcmp(space, "Hello string witaaaa", 20));
+
+    cxBufferDestroy(&buf);
+}
+
+TEST_F(PrintfFixture, SPrintf) {
+    auto h = "Hello";
+
+    std::vector<char *> fl;
+    cxmutstr r;
+
+    r = cx_asprintf_a(&alloc, "teststring");
+    EXPECT_EQ(r.length, 10);
+    EXPECT_STREQ(r.ptr, "teststring");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "[%10s]", h);
+    EXPECT_EQ(r.length, 12);
+    EXPECT_STREQ(r.ptr, "[     Hello]");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "[%-10s]", h);
+    EXPECT_EQ(r.length, 12);
+    EXPECT_STREQ(r.ptr, "[Hello     ]");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "[%*s]", 10, h);
+    EXPECT_EQ(r.length, 12);
+    EXPECT_STREQ(r.ptr, "[     Hello]");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "[%-10.*s]", 4, h);
+    EXPECT_EQ(r.length, 12);
+    EXPECT_STREQ(r.ptr, "[Hell      ]");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "[%-*.*s]", 10, 4, h);
+    EXPECT_EQ(r.length, 12);
+    EXPECT_STREQ(r.ptr, "[Hell      ]");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "%c", 'A');
+    EXPECT_EQ(r.length, 1);
+    EXPECT_STREQ(r.ptr, "A");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "%i %d %.6i %i %.0i %+i %i", 1, 2, 3, 0, 0, 4, -4);
+    EXPECT_EQ(r.length, 19);
+    EXPECT_STREQ(r.ptr, "1 2 000003 0  +4 -4");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "%x %x %X %#x", 5, 10, 10, 6);
+    EXPECT_EQ(r.length, 9);
+    EXPECT_STREQ(r.ptr, "5 a A 0x6");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "%o %#o %#o", 10, 10, 4);
+    EXPECT_EQ(r.length, 9);
+    EXPECT_STREQ(r.ptr, "12 012 04");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "%05.2f %.2f %5.2f", 1.5, 1.5, 1.5);
+    EXPECT_EQ(r.length, 16);
+    EXPECT_STREQ(r.ptr, "01.50 1.50  1.50");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "'%*c'", 5, 'x');
+    EXPECT_EQ(r.length, 7);
+    EXPECT_STREQ(r.ptr, "'    x'");
+    fl.push_back(r.ptr);
+
+    r = cx_asprintf_a(&alloc, "'%*c'", -5, 'x');
+    EXPECT_EQ(r.length, 7);
+    EXPECT_STREQ(r.ptr, "'x    '");
+    fl.push_back(r.ptr);
+
+    for (auto c: fl) {
+        auto s = cx_mutstrn(c, 0);
+        cx_strfree_a(&alloc, &s);
+    }
+}
+
+TEST_F(PrintfFixture, SPrintfLargeString) {
+    auto aaa = std::string(512, 'a');
+    auto bbb = std::string(512, 'b');
+
+    auto r = cx_asprintf_a(&alloc, "After %s comes %s.", aaa.data(), bbb.data());
+    EXPECT_EQ(r.length, 1038);
+    EXPECT_EQ(r.ptr, std::string("After ") + aaa + " comes " + bbb + ".");
+    EXPECT_EQ(r.ptr[1038], '\0');
+
+    cx_strfree_a(&alloc, &r);
+}
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