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-rw-r--r--rawmemelemcpy.c158
1 files changed, 158 insertions, 0 deletions
diff --git a/rawmemelemcpy.c b/rawmemelemcpy.c
new file mode 100644
index 0000000..2f0f9f0
--- /dev/null
+++ b/rawmemelemcpy.c
@@ -0,0 +1,158 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+#ifndef TEST
+
+
+static inline uint8_t *
+rawmemelemcpy8(uint8_t *restrict d, const uint8_t *restrict s, uint16_t elem)
+{
+ for (; (*d++ = *s) != elem; s++);
+ return d;
+}
+
+
+static inline uint16_t *
+rawmemelemcpy16(uint16_t *restrict d, const uint16_t *restrict s, uint16_t elem)
+{
+ for (; (*d++ = *s) != elem; s++);
+ return d;
+}
+
+
+static inline uint32_t *
+rawmemelemcpy32(uint32_t *restrict d, const uint32_t *restrict s, uint32_t elem)
+{
+ for (; (*d++ = *s) != elem; s++);
+ return d;
+}
+
+
+static inline uint64_t *
+rawmemelemcpy64(uint64_t *restrict d, const uint64_t *restrict s, uint64_t elem)
+{
+ for (; (*d++ = *s) != elem; s++);
+ return d;
+}
+
+
+static inline char *
+rawmemelemcpyx(char *restrict d, const char *restrict s, const char *restrict elem, size_t size)
+{
+ size_t i;
+ for (;; s += size) {
+ for (i = 0; i < size; i++)
+ d[i] = s[i];
+ for (i = 0; i < size; i++)
+ if (d[i] != elem[i])
+ goto next;
+ d += size;
+ return d;
+ next:
+ d += size;
+ }
+}
+
+
+void *
+libsimple_rawmemelemcpy(void *restrict d, const void *restrict s, const void *restrict elem, size_t size) /* TODO man */
+{
+ switch (size) {
+ case 0:
+ return d;
+ case 1:
+ return rawmemelemcpy8(d, s, *(const uint8_t *)elem);
+ case 2:
+ return rawmemelemcpy16(d, s, *(const uint16_t *)elem);
+ case 4:
+ return rawmemelemcpy32(d, s, *(const uint32_t *)elem);
+ case 8:
+ return rawmemelemcpy64(d, s, *(const uint64_t *)elem);
+ default:
+ return rawmemelemcpyx(d, s, elem, size);
+ }
+}
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+ char buf[1024];
+
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "hello", "o", 0) == &buf[0]);
+ assert(!strncmp(buf, "x", 1));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "hello", "l", 0) == &buf[0]);
+ assert(!strncmp(buf, "x", 1));
+
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "hello", "o", 1) == &buf[5]);
+ assert(!strncmp(buf, "hellox", 6));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "hello", "l", 1) == &buf[3]);
+ assert(!strncmp(buf, "helx", 4));
+
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, ".h.e.l.l.o", ".o", 2) == &buf[5 * 2]);
+ assert(!strncmp(buf, ".h.e.l.l.ox", 11));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, ".h.e.l.l.o", ".l", 2) == &buf[3 * 2]);
+ assert(!strncmp(buf, ".h.e.lx", 7));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, ".h.l.ll..o", "l.", 2) == &buf[4 * 2]);
+ assert(!strncmp(buf, ".h.l.ll.x", 9));
+
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "..h..e..l..l..o", "..o", 3) == &buf[5 * 3]);
+ assert(!strncmp(buf, "..h..e..l..l..ox", 16));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "..h..e..l..l..o", "..l", 3) == &buf[3 * 3]);
+ assert(!strncmp(buf, "..h..e..lx", 10));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "..h..l..ll....o", "l..", 3) == &buf[4 * 3]);
+ assert(!strncmp(buf, "..h..l..ll..x", 13));
+
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "...h...e...l...l...o", "...o", 4) == &buf[5 * 4]);
+ assert(!strncmp(buf, "...h...e...l...l...ox", 21));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "...h...e...l...l...o", "...l", 4) == &buf[3 * 4]);
+ assert(!strncmp(buf, "...h...e...lx", 13));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, "...h...l...ll......o", "l...", 4) == &buf[4 * 4]);
+ assert(!strncmp(buf, "...h...l...ll...x", 17));
+
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, ".......h.......e.......l.......l.......o", ".......o", 8) == &buf[5 * 8]);
+ assert(!strncmp(buf, ".......h.......e.......l.......l.......ox", 21));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, ".......h.......e.......l.......l.......o", ".......l", 8) == &buf[3 * 8]);
+ assert(!strncmp(buf, ".......h.......e.......lx", 13));
+
+ memset(buf, 'x', sizeof(buf)), buf[sizeof(buf) - 1] = '\0';
+ assert(libsimple_rawmemelemcpy(buf, ".......h.......l.......ll..............o", "l.......", 8) == &buf[4 * 8]);
+ assert(!strncmp(buf, ".......h.......l.......ll.......x", 21));
+
+
+ return 0;
+}
+
+#endif