--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ucx/printf.c Fri Apr 21 21:25:32 2023 +0200
@@ -0,0 +1,129 @@
+/*
+ * 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 <stdio.h>
+#include <string.h>
+
+#ifndef CX_PRINTF_SBO_SIZE
+#define CX_PRINTF_SBO_SIZE 512
+#endif
+
+int cx_fprintf(
+ void *stream,
+ cx_write_func wfc,
+ char const *fmt,
+ ...
+) {
+ int ret;
+ va_list ap;
+ va_start(ap, fmt);
+ ret = cx_vfprintf(stream, wfc, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
+int cx_vfprintf(
+ void *stream,
+ cx_write_func wfc,
+ char const *fmt,
+ va_list ap
+) {
+ char buf[CX_PRINTF_SBO_SIZE];
+ va_list ap2;
+ va_copy(ap2, ap);
+ int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap);
+ if (ret < 0) {
+ return ret;
+ } else if (ret < CX_PRINTF_SBO_SIZE) {
+ return (int) wfc(buf, 1, ret, stream);
+ } else {
+ int len = ret + 1;
+ char *newbuf = malloc(len);
+ if (!newbuf) {
+ return -1;
+ }
+
+ ret = vsnprintf(newbuf, len, fmt, ap2);
+ if (ret > 0) {
+ ret = (int) wfc(newbuf, 1, ret, stream);
+ }
+ free(newbuf);
+ }
+ return ret;
+}
+
+cxmutstr cx_asprintf_a(
+ CxAllocator const *allocator,
+ char const *fmt,
+ ...
+) {
+ va_list ap;
+ cxmutstr ret;
+ va_start(ap, fmt);
+ ret = cx_vasprintf_a(allocator, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
+cxmutstr cx_vasprintf_a(
+ CxAllocator const *a,
+ char const *fmt,
+ va_list ap
+) {
+ cxmutstr s;
+ s.ptr = NULL;
+ s.length = 0;
+ char buf[CX_PRINTF_SBO_SIZE];
+ va_list ap2;
+ va_copy(ap2, ap);
+ int ret = vsnprintf(buf, CX_PRINTF_SBO_SIZE, fmt, ap);
+ if (ret > 0 && ret < CX_PRINTF_SBO_SIZE) {
+ s.ptr = cxMalloc(a, ret + 1);
+ if (s.ptr) {
+ s.length = (size_t) ret;
+ memcpy(s.ptr, buf, ret);
+ s.ptr[s.length] = '\0';
+ }
+ } else {
+ int len = ret + 1;
+ s.ptr = cxMalloc(a, len);
+ if (s.ptr) {
+ ret = vsnprintf(s.ptr, len, fmt, ap2);
+ if (ret < 0) {
+ free(s.ptr);
+ s.ptr = NULL;
+ } else {
+ s.length = (size_t) ret;
+ }
+ }
+ }
+ return s;
+}
+