1 files changed, 90 insertions, 0 deletions
diff --git a/pcilib/datacpy.c b/pcilib/datacpy.c
new file mode 100644
index 0000000..15dfbe9
--- /dev/null
+++ b/pcilib/datacpy.c
@@ -0,0 +1,90 @@
+#define _POSIX_C_SOURCE 200112L
+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <assert.h>
+#include <ctype.h>
+#include <time.h>
+#include <sched.h>
+#include <arpa/inet.h>
+#include <sys/time.h>
+
+#include "pci.h"
+#include "tools.h"
+#include "error.h"
+
+void *pcilib_datacpy32(void * dst, void const * src, size_t n, pcilib_endianess_t endianess) {
+    uint32_t * plDst = (uint32_t *) dst;
+    uint32_t const * plSrc = (uint32_t const *) src;
+
+    int swap = 0;
+
+    if (endianess) 
+        swap = (endianess == PCILIB_BIG_ENDIAN)?(ntohs(1)!=1):(ntohs(1)==1);
+
+    if (swap) {
+        while (n > 0) {
+            *plDst = ntohl(*plSrc);
+            ++plSrc;
+            ++plDst;
+            --n;
+        }
+    } else {
+        while (n > 0) {
+            *plDst = *plSrc;
+            ++plSrc;
+            ++plDst;
+            --n;
+        }
+    }
+
+    return dst;
+} 
+
+void *pcilib_datacpy64(void * dst, void const * src, size_t n, pcilib_endianess_t endianess) {
+    uint64_t * plDst = (uint64_t *) dst;
+    uint64_t const * plSrc = (uint64_t const *) src;
+
+    int swap = 0;
+
+    if (endianess) 
+        swap = (endianess == PCILIB_BIG_ENDIAN)?(be64toh(1)!=1):(be64toh(1)==1);
+
+    if (swap) {
+        while (n > 0) {
+            *plDst = ntohl(*plSrc);
+            ++plSrc;
+            ++plDst;
+            --n;
+        }
+    } else {
+        while (n > 0) {
+            *plDst = *plSrc;
+            ++plSrc;
+            ++plDst;
+            --n;
+        }
+    }
+
+    return dst;
+}
+
+typedef void* (*pcilib_datacpy_routine_t)(void * dst, void const * src, size_t n, pcilib_endianess_t endianess);
+static pcilib_datacpy_routine_t pcilib_datacpy_routines[4] = {
+    NULL, NULL, pcilib_datacpy32, pcilib_datacpy64
+};
+
+void *pcilib_datacpy(void * dst, void const * src, uint8_t size, size_t n, pcilib_endianess_t endianess) {
+    size_t pos = 0;
+    pcilib_datacpy_routine_t routine;
+
+    assert((size)&&(size < 64));
+
+    while (size >>= 1) ++pos;
+    routine = pcilib_datacpy_routines[pos];
+
+    return routine(dst, src, n, endianess);
+}