【添加】文件 crc32 计算功能

SummerGift · SummerGift · commit cfc398aaab2d · 2019-07-23T11:57:12.000+08:00
diff --git a/port/genhdr/qstrdefs.generated.h b/port/genhdr/qstrdefs.generated.h
@@ -762,4 +762,5 @@ QDEF(MP_QSTR_ONE_SHOT, (const byte*)"\x5e\x08" "ONE_SHOT")
 QDEF(MP_QSTR_PERIODIC, (const byte*)"\x0a\x08" "PERIODIC")
 QDEF(MP_QSTR_period, (const byte*)"\xa0\x06" "period")
 QDEF(MP_QSTR_set_color, (const byte*)"\x25\x09" "set_color")
+QDEF(MP_QSTR_file_crc32, (const byte*)"\x6f\x0a" "file_crc32")
 // This file was automatically generated by makeqstrdata.py
diff --git a/port/moduos.c b/port/moduos.c
@@ -111,6 +111,7 @@ STATIC const mp_rom_map_elem_t os_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_stat), MP_ROM_PTR(&mp_posix_stat_obj) },
     { MP_ROM_QSTR(MP_QSTR_unlink), MP_ROM_PTR(&mp_posix_remove_obj) },     // unlink aliases to remove
     { MP_ROM_QSTR(MP_QSTR_sync), MP_ROM_PTR(&mod_os_sync_obj) },
+    { MP_ROM_QSTR(MP_QSTR_file_crc32), MP_ROM_PTR(&mp_posix_file_crc32_obj) },
 
     /// \constant sep - separation character used in paths
     //{ MP_ROM_QSTR(MP_QSTR_sep), MP_ROM_QSTR(MP_QSTR__slash_) },
diff --git a/port/moduos_file.c b/port/moduos_file.c
@@ -31,13 +31,11 @@
 #include <stdint.h>
 #include <string.h>
 #include <dfs_posix.h>
-
 #include "py/runtime.h"
 #include "py/objstr.h"
 #include "py/mperrno.h"
 #include "moduos_file.h"
 
-
 mp_obj_t mp_posix_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
 
     return mp_const_none;
@@ -141,7 +139,7 @@ mp_obj_t mp_posix_listdir(size_t n_args, const mp_obj_t *args) {
     }
     else
     {
-        rt_kprintf("No such directory\n");
+//        rt_kprintf("No such directory\n");
     }
     if (pathname == NULL)
         rt_free(path);
@@ -225,6 +223,60 @@ mp_obj_t mp_posix_stat(mp_obj_t path_in) {
 }
 MP_DEFINE_CONST_FUN_OBJ_1(mp_posix_stat_obj, mp_posix_stat);
 
+static uint32_t calc_crc32(const char* pathname)
+{
+    #define CALC_BUFFER_SIZE 512
+    extern uint32_t mp_calc_crc32(uint32_t crc, const void *buf, size_t len);
+
+    int fd;
+    uint32_t temp_crc = 0;
+    void *buffer = malloc(CALC_BUFFER_SIZE);
+
+    if (buffer == RT_NULL)
+    {
+        mp_raise_OSError(MP_ENOMEM);
+    }
+
+    fd = open(pathname, O_RDONLY, 0);
+    if (fd < 0)
+    {
+        return -MP_EINVAL;
+    }
+
+    while (1)
+    {
+        int len = read(fd, buffer, CALC_BUFFER_SIZE);
+        if (len < 0)
+        {
+            close(fd);
+            return -MP_EIO;
+        }
+        else if (len == 0)
+            break;
+
+        temp_crc = mp_calc_crc32(temp_crc, buffer, len);
+    }
+
+    close(fd);
+    free(buffer);
+
+    return temp_crc;
+}
+
+mp_obj_t mp_posix_file_crc32(mp_obj_t path_in) {
+    extern void mp_hex_to_str(char *pbDest, char *pbSrc, int nLen);
+    
+    uint32_t value = 0;
+    char str[9];
+    const char *createpath = mp_obj_str_get_str(path_in);
+
+    value = calc_crc32((char *)createpath);
+    mp_hex_to_str(str,(char *)&value, 4);
+
+    return mp_obj_new_str(str, strlen(str));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(mp_posix_file_crc32_obj, mp_posix_file_crc32);
+
 mp_import_stat_t mp_posix_import_stat(const char *path) {
 
     struct stat stat;
diff --git a/port/moduos_file.h b/port/moduos_file.h
@@ -52,6 +52,7 @@ mp_obj_t mp_posix_rename(mp_obj_t old_path_in, mp_obj_t new_path_in);
 mp_obj_t mp_posix_rmdir(uint n_args, const mp_obj_t *arg);
 mp_obj_t mp_posix_stat(mp_obj_t path_in);
 mp_obj_t mp_posix_statvfs(mp_obj_t path_in);
+mp_obj_t mp_posix_file_crc32(mp_obj_t path_in);
 
 MP_DECLARE_CONST_FUN_OBJ_KW(mp_posix_mount_obj);
 MP_DECLARE_CONST_FUN_OBJ_1(mp_posix_umount_obj);
@@ -65,5 +66,6 @@ MP_DECLARE_CONST_FUN_OBJ_2(mp_posix_rename_obj);
 MP_DECLARE_CONST_FUN_OBJ_VAR(mp_posix_rmdir_obj);
 MP_DECLARE_CONST_FUN_OBJ_1(mp_posix_stat_obj);
 MP_DECLARE_CONST_FUN_OBJ_1(mp_posix_statvfs_obj);
+MP_DECLARE_CONST_FUN_OBJ_1(mp_posix_file_crc32_obj);
 
 #endif // MICROPY_INCLUDED_PY_MODUOS_FILE_H
diff --git a/port/modutils.c b/port/modutils.c
@@ -0,0 +1,115 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 SummerGift (SummerGift@qq.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+#include "py/mpconfig.h"
+
+static const uint32_t crc32_table[] =
+{
+    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
+    0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+    0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
+    0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+    0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+    0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
+    0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
+    0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
+    0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
+    0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+    0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+    0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
+    0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+    0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
+    0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
+    0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+    0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
+    0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+    0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+    0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
+    0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
+    0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
+    0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
+    0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+    0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+    0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
+    0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+    0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
+    0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
+    0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+    0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
+};
+
+/**
+ * Calculate the CRC32 value of a memory buffer.
+ *
+ * @param crc accumulated CRC32 value, must be 0 on first call
+ * @param buf buffer to calculate CRC32 value for
+ * @param len bytes in buffer
+ *
+ * @return calculated CRC32 value
+ */
+uint32_t mp_calc_crc32(uint32_t crc, const void *buf, size_t len)
+{
+    const uint8_t *p;
+
+    p = (const uint8_t *)buf;
+    crc = crc ^ ~0U;
+
+    while (len--) {
+        crc = crc32_table[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
+    }
+
+    return crc ^ ~0U;
+}
+
+void mp_hex_to_str(char *pbDest, char *pbSrc, int nLen)
+{
+    char ddl,ddh;
+    int i;
+
+    for (i=0; i<nLen; i++)
+    {
+        ddh = 48 + pbSrc[i] / 16;
+        ddl = 48 + pbSrc[i] % 16;
+        if (ddh > 57) ddh = ddh + 7;
+        if (ddl > 57) ddl = ddl + 7;
+        pbDest[i*2] = ddh;
+        pbDest[i*2+1] = ddl;
+    }
+
+    pbDest[nLen*2] = '\0';
+}
