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-rwxr-xr-xC/7zBuf2.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/C/7zBuf2.c b/C/7zBuf2.c
new file mode 100755
index 0000000..1c8b931
--- /dev/null
+++ b/C/7zBuf2.c
@@ -0,0 +1,45 @@
+/* 7zBuf2.c -- Byte Buffer
+2008-10-04 : Igor Pavlov : Public domain */
+
+#include <string.h>
+#include "7zBuf.h"
+
+void DynBuf_Construct(CDynBuf *p)
+{
+ p->data = 0;
+ p->size = 0;
+ p->pos = 0;
+}
+
+void DynBuf_SeekToBeg(CDynBuf *p)
+{
+ p->pos = 0;
+}
+
+int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAlloc *alloc)
+{
+ if (size > p->size - p->pos)
+ {
+ size_t newSize = p->pos + size;
+ Byte *data;
+ newSize += newSize / 4;
+ data = (Byte *)alloc->Alloc(alloc, newSize);
+ if (data == 0)
+ return 0;
+ p->size = newSize;
+ memcpy(data, p->data, p->pos);
+ alloc->Free(alloc, p->data);
+ p->data = data;
+ }
+ memcpy(p->data + p->pos, buf, size);
+ p->pos += size;
+ return 1;
+}
+
+void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc)
+{
+ alloc->Free(alloc, p->data);
+ p->data = 0;
+ p->size = 0;
+ p->pos = 0;
+}