Port fmemopen to NimbusKit.

deps.json

@@ -0,0 +1 @@
+{"NimbusKit":[],"Frameworks":[]}

src/NimbusMemoryMapping.h

@@ -0,0 +1,28 @@
+//
+// Copyright 2011-2014 NimbusKit
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifdef NIMBUSKIT_FRAMEWORK
+  #import <NimbusKit/fmemopen.h>
+#else
+  #import "fmemopen.h"
+#endif
+
+/**
+ * @defgroup NimbusMemoryMappping Nimbus Memory Mapping
+ *
+ * <div id="github" feature="memorymapping"></div>
+ *
+ */

fmemopen.c → src/fmemopen.c

@@ -58,9 +58,23 @@ static fpos_t seekfn(void *handler, fpos_t offset, int whence) {
   fmem_t *mem = handler;
 
   switch (whence) {
-    case SEEK_SET: pos = offset; break;
-    case SEEK_CUR: pos = mem->pos + offset; break;
-    case SEEK_END: pos = mem->size + offset; break;
+    case SEEK_SET: {
+      if (offset >= 0) {
+        pos = (size_t)offset;
+      } else {
+        pos = 0;
+      }
+      break;
+    }
+    case SEEK_CUR: {
+      if (offset >= 0 || (size_t)(-offset) <= mem->pos) {
+        pos = mem->pos + (size_t)offset;
+      } else {
+        pos = 0;
+      }
+      break;
+    }
+    case SEEK_END: pos = mem->size + (size_t)offset; break;
     default: return -1;
   }
 

fmemopen.h → src/fmemopen.h

@@ -18,9 +18,8 @@
 #ifndef FMEMOPEN_H_
 #define FMEMOPEN_H_
 
-#ifdef __cplusplus
-extern "C"
-{
+#if defined __cplusplus
+extern "C" {
 #endif
 
 /**
@@ -36,12 +35,13 @@ extern "C"
  *
  * You must call fclose on the returned file pointer or memory will be leaked.
  *
- *      @param buf The data that will be used to back the FILE* methods. Must be at least
- *                 @c size bytes.
- *      @param size The size of the @c buf data.
- *      @param mode The permitted stream operation modes.
- *      @returns A pointer that can be used in the fread/fwrite/fseek/fclose family of methods.
- *               If a failure occurred NULL will be returned.
+ * @param buf The data that will be used to back the FILE* methods. Must be at least
+ *            @c size bytes.
+ * @param size The size of the @c buf data.
+ * @param mode The permitted stream operation modes.
+ * @return A pointer that can be used in the fread/fwrite/fseek/fclose family of methods.
+ *         If a failure occurred NULL will be returned.
+ * @ingroup NimbusMemoryMappping
  */
 FILE *fmemopen(void *buf, size_t size, const char *mode);