/****************************************************************************

Copyright(c) 2019 by Aerospace C.Power (Chongqing) Microelectronics. ALL RIGHTS RESERVED.

This Information is proprietary to Aerospace C.Power (Chongqing) Microelectronics and MAY NOT
be copied by any method or incorporated into another program without
the express written consent of Aerospace C.Power. This Information or any portion
thereof remains the property of Aerospace C.Power. The Information contained herein
is believed to be accurate and Aerospace C.Power assumes no responsibility or
liability for its use in any way and conveys no license or title under
any patent or copyright and makes no representation or warranty that this
Information is free from patent or copyright infringement.

****************************************************************************/
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include "oem_common.h"

const uint32_t iot_crc32_table[256] = {
    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
};

uint32_t iot_getcrc32_update(uint32_t init_vect, uint8_t *pbyData, uint32_t stLength)
{
    register uint32_t crc = init_vect;
    while (stLength-- != 0)
    {
        crc = ((crc >> 8) & 0x00FFFFFF) ^
            iot_crc32_table[(crc ^ *(pbyData++)) & 0x000000FF];
    }

    return crc;
}

uint32_t iot_getcrc32(uint8_t *pbyData, uint32_t stLength)
{
    uint32_t crc = iot_getcrc32_update(0xFFFFFFFF, pbyData, stLength);
    return (crc ^ 0xFFFFFFFF);
}

uint8_t iot_getcrc8(uint8_t *pbyData, uint32_t stLength)
{
    uint32_t crc = iot_getcrc32(pbyData, stLength);
    return (uint8_t)(crc >> 24);
}

size_t iot_strlen( const char *s )
{
    uint32_t r = 0;
    while( *s++ ) r++;
    return r;
}

int oem_atoi(char *s)
{
    int i = 0, n = 0;
    int is_hex = 0;


    if (*s == '0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
        is_hex = 1;
    }
    if (is_hex == 1) {
        char c ;
        int num = 0;
        for(i = 2; *(s+i) != '\0'; i++) {
            if( (*(s+i) < '0') || (*(s+i) > '9' && *(s+i) < 'A')
                || (*(s+i) > 'F' && *(s+i) < 'a') || *(s+i) > 'f') {
                return -1;
            }
            c = *(s+i);
            switch(c) {
                case 'a': case 'A':  num = 10; break;
                case 'b': case 'B':  num = 11; break;
                case 'c': case 'C':  num = 12; break;
                case 'd': case 'D':  num = 13; break;
                case 'e': case 'E':  num = 14; break;
                case 'f': case 'F':  num = 15; break;
                default : num = c - '0'; break;
            }
            n = 16 * n + num;
        }
    } else {
        for(i = 0; *(s+i) != '\0'; i++) {
            if( *(s+i) < 0x30 || *(s+i) > 0x39 ) {
                return -1;
            }
            n = 10 * n + (*(s+i) - '0');
        }
    }
    return n;
}

void die (const char *format, ...)
{
    va_list args;
    va_start (args, format);
    vfprintf (stderr, format, args);
    va_end (args);
    fprintf (stderr, "\n");
    exit (1);
}

char *peek_next_token (char *buf)
{
    while (*buf && !isspace (*buf))
        buf++;
    while (*buf && isspace (*buf))
        buf++;
    return buf;
}

bool is_whitespace (const char *text)
{
    while (*text != 0) {
        if (!isspace (*text))
            return 0;
        text++;
    }
    return 1;
}

void chomp_trailing_whitespace (char *buf)
{
    unsigned len = strlen (buf);
    while (len > 0){
        if (!isspace (buf[len-1]))
            break;
        len--;
    }
    buf[len] = 0;
}

bool starts_with (const char *str, const char *prefix)
{
    return memcmp (str, prefix, strlen (prefix)) == 0;
}