Optimize with SSE2/SSE3 and 128 bit inversions

Signed-off-by: sigsegv7 <ian@vegaa.systems>

1 files changed, 0 insertions, 140 deletions

diff --git a/main.c b/main.c
deleted file mode 100644
index 44b2dab..0000000
--- a/main.c
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Copyright (c) 2023 Ian Marco Moffett and the VegaOS team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of VegaOS nor the names of its
- *    contributors may be used to endorse or promote products derived from
- *    this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <assert.h>
-#include <unistd.h>
-
-#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__
-#error "Big endian machines not supported yet"
-#endif
-
-#define flip_block(TMP_VAR, TYPE, BUF, POS)         \
-        TMP_VAR = *(TYPE *)&BUF[POS];               \
-        TMP_VAR = ~TMP_VAR;                         \
-        *(TYPE *)&BUF[POS] = TMP_VAR;               \
-
-static char *
-read_file(const char *fname, size_t *size_out)
-{
-    FILE *fp;
-    char *buf;
-    size_t bufsize;
-
-    if (access(fname, F_OK) != 0) {
-        fprintf(stderr, "%s does not exist!\n");
-        return NULL;
-    }
-
-    fp = fopen(fname, "r");
-
-    /* Get file size */
-    fseek(fp, 0, SEEK_END);
-    bufsize = ftell(fp);
-    fseek(fp, 0, SEEK_SET);
-
-    buf = malloc(bufsize);
-    fread(buf, sizeof(char), bufsize, fp);
-    fclose(fp);
-
-    *size_out = bufsize;
-
-    return buf;
-}
-
-static void
-writeback_file(const char *fname, const char *buf, size_t buf_size)
-{
-    FILE *fp;
-
-    fp = fopen(fname, "w");
-    fwrite(buf, buf_size, sizeof(char), fp);
-    fclose(fp);
-}
-
-static char *
-encrypt(char *buf, size_t buf_size)
-{
-    size_t current_pos;
-    size_t step;
-    uint64_t tmp;
-
-    current_pos = 0;
-    step = 8;           /* Start at 8 bytes (64 bits) */
-
-    while (current_pos < buf_size) {
-        /* Ensure we aren't over 8 bytes and a power of two */
-        if (step != 1) {
-            assert((step & 1) == 0 && step <= 8);
-        }
-
-        switch (step) {
-        case 8:
-            flip_block(tmp, uint64_t, buf, current_pos);
-            break;
-        case 4:
-            flip_block(tmp, uint32_t, buf, current_pos);
-            break;
-        case 2:
-            flip_block(tmp, uint16_t, buf, current_pos);
-            break;
-        case 1:
-            flip_block(tmp, uint8_t, buf, current_pos);
-            break;
-        }
-
-        current_pos += step;
-
-        /* Ensure we don't cause any overflows */
-        while (((current_pos + step) >= buf_size) && step > 1)
-            /* Essentially divide the step by 2, just faster */
-            step >>= 1;
-    }
-}
-
-int
-main(int argc, const char **argv)
-{
-    size_t buf_size;
-    char *buf;
-
-    if (argc < 2) {
-        fprintf(stderr, "Usage: %s <file>\n", argv[0]);
-        return 1;
-    }
-
-    buf = read_file(argv[1], &buf_size);
-    encrypt(buf, buf_size);
-    writeback_file(argv[1], buf, buf_size);
-    free(buf);
-
-    return 0;
-}