1 files changed, 115 insertions, 0 deletions
diff --git a/libparc/parc/algol/parc_FileInputStream.c b/libparc/parc/algol/parc_FileInputStream.c
new file mode 100755
index 00000000..f42ced73
--- /dev/null
+++ b/libparc/parc/algol/parc_FileInputStream.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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.
+ */
+
+/**
+ */
+#include <config.h>
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include <LongBow/runtime.h>
+
+#include <parc/algol/parc_Memory.h>
+#include <parc/algol/parc_File.h>
+#include <parc/algol/parc_Buffer.h>
+#include <parc/algol/parc_InputStream.h>
+#include <parc/algol/parc_FileInputStream.h>
+#include <parc/algol/parc_Object.h>
+
+PARCInputStreamInterface *PARCFileInputStreamAsPARCInputStream = &(PARCInputStreamInterface) {
+    .Acquire = (PARCInputStream * (*)(const PARCInputStream *))parcFileInputStream_Acquire,
+    .Release = (void (*)(PARCInputStream **))parcFileInputStream_Release,
+    .Read = (size_t (*)(PARCInputStream *, PARCBuffer *))parcFileInputStream_Read
+};
+
+struct parc_file_input_stream {
+    int fd;
+};
+
+static void
+_destroy(PARCFileInputStream **inputStreamPtr)
+{
+    PARCFileInputStream *inputStream = *inputStreamPtr;
+
+    close(inputStream->fd);
+}
+
+parcObject_ExtendPARCObject(PARCFileInputStream, _destroy, NULL, NULL, NULL, NULL, NULL, NULL);
+
+PARCFileInputStream *
+parcFileInputStream_Open(const PARCFile *file)
+{
+    PARCFileInputStream *result = NULL;
+
+    char *fileName = parcFile_ToString(file);
+    if (fileName != NULL) {
+        result = parcFileInputStream_Create(open(fileName, O_RDONLY));
+        parcMemory_Deallocate((void **) &fileName);
+    }
+
+    return result;
+}
+
+PARCFileInputStream *
+parcFileInputStream_Create(int fileDescriptor)
+{
+    trapIllegalValueIf(fileDescriptor < 0, "File descriptor must not be negative.");
+
+    PARCFileInputStream *result = parcObject_CreateInstance(PARCFileInputStream);
+    if (result != NULL) {
+        result->fd = fileDescriptor;
+    }
+
+    return result;
+}
+
+parcObject_ImplementAcquire(parcFileInputStream, PARCFileInputStream);
+parcObject_ImplementRelease(parcFileInputStream, PARCFileInputStream);
+
+bool
+parcFileInputStream_Read(PARCFileInputStream *inputStream, PARCBuffer *buffer)
+{
+    while (parcBuffer_HasRemaining(buffer)) {
+        void *buf = parcBuffer_Overlay(buffer, 0);
+        ssize_t nread = read(inputStream->fd, buf, parcBuffer_Remaining(buffer));
+        if (nread < 0) {
+            break;
+        }
+        parcBuffer_SetPosition(buffer, parcBuffer_Position(buffer) + nread);
+    }
+    return parcBuffer_HasRemaining(buffer);
+}
+
+PARCBuffer *
+parcFileInputStream_ReadFile(PARCFileInputStream *inputStream)
+{
+    PARCBuffer *result = NULL;
+
+    struct stat statbuf;
+
+    if (fstat(inputStream->fd, &statbuf) == 0) {
+        result = parcBuffer_Allocate(statbuf.st_size);
+        if (result != NULL) {
+            parcFileInputStream_Read(inputStream, result);
+        }
+    }
+
+    return result;
+}