Help!-Errors while running this snippet code

Discussion in 'C Programming' started by Kavitha Rao, Jul 2, 2003.

  1. Kavitha Rao

    Kavitha Rao Guest

    Hi,
    I am getting the following errors while trying to run this snippet
    in Microsoft Visual C++.Can't seem to print the crc value stored.

    /* +++Date last modified: 05-Jul-1997 */

    /* Crc - 32 BIT ANSI X3.66 CRC checksum files */

    #include <stdio.h>
    #include "crc.h"

    #ifdef __TURBOC__
    #pragma warn -cln
    #endif

    /**********************************************************************\
    |* Demonstration program to compute the 32-bit CRC used as the frame
    *|
    |* check sequence in ADCCP (ANSI X3.66, also known as FIPS PUB 71
    *|
    |* and FED-STD-1003, the U.S. versions of CCITT's X.25 link-level
    *|
    |* protocol). The 32-bit FCS was added via the Federal Register,
    *|
    |* 1 June 1982, p.23798. I presume but don't know for certain that
    *|
    |* this polynomial is or will be included in CCITT V.41, which
    *|
    |* defines the 16-bit CRC (often called CRC-CCITT) polynomial. FIPS
    *|
    |* PUB 78 says that the 32-bit FCS reduces otherwise undetected
    *|
    |* errors by a factor of 10^-5 over 16-bit FCS.
    *|
    \**********************************************************************/

    /* Need an unsigned type capable of holding 32 bits; */

    typedef DWORD UNS_32_BITS;

    /* Copyright (C) 1986 Gary S. Brown. You may use this program, or
    code or tables extracted from it, as desired without restriction.*/

    /* First, the polynomial itself and its table of feedback terms. The
    */
    /* polynomial is
    */
    /* X^32+X^26+X^23+X^22+X^16+X^12+X^11+X^10+X^8+X^7+X^5+X^4+X^2+X^1+X^0
    */
    /* Note that we take it "backwards" and put the highest-order term in
    */
    /* the lowest-order bit. The X^32 term is "implied"; the LSB is the
    */
    /* X^31 term, etc. The X^0 term (usually shown as "+1") results in
    */
    /* the MSB being 1.
    */

    /* Note that the usual hardware shift register implementation, which
    */
    /* is what we're using (we're merely optimizing it by doing eight-bit
    */
    /* chunks at a time) shifts bits into the lowest-order term. In our
    */
    /* implementation, that means shifting towards the right. Why do we
    */
    /* do it this way? Because the calculated CRC must be transmitted in
    */
    /* order from highest-order term to lowest-order term. UARTs transmit
    */
    /* characters in order from LSB to MSB. By storing the CRC this way,
    */
    /* we hand it to the UART in the order low-byte to high-byte; the UART
    */
    /* sends each low-bit to hight-bit; and the result is transmission bit
    */
    /* by bit from highest- to lowest-order term without requiring any bit
    */
    /* shuffling on our part. Reception works similarly.
    */

    /* The feedback terms table consists of 256, 32-bit entries. Notes:
    */
    /*
    */
    /* 1. The table can be generated at runtime if desired; code to do so
    */
    /* is shown later. It might not be obvious, but the feedback
    */
    /* terms simply represent the results of eight shift/xor opera-
    */
    /* tions for all combinations of data and CRC register values.
    */
    /*
    */
    /* 2. The CRC accumulation logic is the same for all CRC polynomials,
    */
    /* be they sixteen or thirty-two bits wide. You simply choose the
    */
    /* appropriate table. Alternatively, because the table can be
    */
    /* generated at runtime, you can start by generating the table for
    */
    /* the polynomial in question and use exactly the same "updcrc",
    */
    /* if your application needn't simultaneously handle two CRC
    */
    /* polynomials. (Note, however, that XMODEM is strange.)
    */
    /*
    */
    /* 3. For 16-bit CRCs, the table entries need be only 16 bits wide;
    */
    /* of course, 32-bit entries work OK if the high 16 bits are zero.
    */
    /*
    */
    /* 4. The values must be right-shifted by eight bits by the "updcrc"
    */
    /* logic; the shift must be unsigned (bring in zeroes). On some
    */
    /* hardware you could probably optimize the shift in assembler by
    */
    /* using byte-swap instructions.
    */

    static UNS_32_BITS crc_32_tab[] = { /* CRC polynomial 0xedb88320 */
    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
    };

    DWORD updateCRC32(unsigned char ch, DWORD crc)
    {
    return UPDC32(ch, crc);
    }

    Boolean_T crc32file(char *name, DWORD *crc, long *charcnt)
    {
    register FILE *fin;
    register DWORD oldcrc32;
    register int c;

    oldcrc32 = 0xFFFFFFFF; *charcnt = 0;
    #ifdef MSDOS
    if ((fin=fopen(name, "rb"))==NULL)
    #else
    if ((fin=fopen(name, "r"))==NULL)
    #endif
    {
    perror(name);
    return Error_;
    }
    while ((c=getc(fin))!=EOF)
    {
    ++*charcnt;
    oldcrc32 = UPDC32(c, oldcrc32);
    }

    if (ferror(fin))
    {
    perror(name);
    *charcnt = -1;
    }
    fclose(fin);

    *crc = oldcrc32 = ~oldcrc32;

    return Success_;
    }

    DWORD crc32buf(char *buf, size_t len)
    {
    register DWORD oldcrc32;

    oldcrc32 = 0xFFFFFFFF;

    for ( ; len; --len, ++buf)
    {
    oldcrc32 = UPDC32(*buf, oldcrc32);
    }

    return ~oldcrc32;

    }

    #ifdef TEST

    main(int argc, char *argv[])
    {
    DWORD crc;
    long charcnt;
    register errors = 0;

    while(--argc > 0)
    {
    errors |= crc32file(*++argv, &crc, &charcnt);
    printf("%08lX %7ld %s\n", crc, charcnt, *argv);
    }
    return(errors != 0);
    }

    #endif /* TEST */


    /************************ERRORS*********************/
    Compiling...
    CRC_32.C
    D:\Program Files\DevStudio\MyProjects\newz\CRC_32.C(30) : error C2282:
    'DWORD' is followed by 'crc32buf' (missing ','?)
    D:\Program Files\DevStudio\MyProjects\newz\CRC_32.C(84) : error C2282:
    'DWORD' is followed by 'crc_32_tab' (missing ','?)
    D:\Program Files\DevStudio\MyProjects\newz\CRC_32.C(128) : error
    C2059: syntax error : '}'
    D:\Program Files\DevStudio\MyProjects\newz\CRC_32.C(136) : error
    C2282: 'Boolean_T' is followed by 'crc32file' (missing ','?)
    D:\Program Files\DevStudio\MyProjects\newz\CRC_32.C(168) : error
    C2059: syntax error : '}'
    Error executing cl.exe.

    Thanks in advance for all Suggestions and help to run this code
     
    Kavitha Rao, Jul 2, 2003
    #1
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  2. Kavitha Rao

    Artie Gold Guest

    So why are you asking here? C is not C++.
    Furthermore, the (entirely too much) code you've posted is full of
    non-standard, platform specific material.

    Try a micro***t newsgroup.

    And before posting here again, RTFF!

    HTH,
    --ag
     
    Artie Gold, Jul 2, 2003
    #2
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  3. Kavitha Rao

    Kavitha Rao Guest

    <snip>
    Thanks I have found the solution ,the code is working fine and
    prints the correct crc value.
     
    Kavitha Rao, Jul 3, 2003
    #3
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