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tetex-bin  3.0
Defines | Functions
md5.c File Reference
#include "md5.h"
#include <string.h>

Go to the source code of this file.

Defines

#define BYTE_ORDER   0
#define T_MASK   ((md5_word_t)~0)
#define T1   /* 0xd76aa478 */ (T_MASK ^ 0x28955b87)
#define T2   /* 0xe8c7b756 */ (T_MASK ^ 0x173848a9)
#define T3   0x242070db
#define T4   /* 0xc1bdceee */ (T_MASK ^ 0x3e423111)
#define T5   /* 0xf57c0faf */ (T_MASK ^ 0x0a83f050)
#define T6   0x4787c62a
#define T7   /* 0xa8304613 */ (T_MASK ^ 0x57cfb9ec)
#define T8   /* 0xfd469501 */ (T_MASK ^ 0x02b96afe)
#define T9   0x698098d8
#define T10   /* 0x8b44f7af */ (T_MASK ^ 0x74bb0850)
#define T11   /* 0xffff5bb1 */ (T_MASK ^ 0x0000a44e)
#define T12   /* 0x895cd7be */ (T_MASK ^ 0x76a32841)
#define T13   0x6b901122
#define T14   /* 0xfd987193 */ (T_MASK ^ 0x02678e6c)
#define T15   /* 0xa679438e */ (T_MASK ^ 0x5986bc71)
#define T16   0x49b40821
#define T17   /* 0xf61e2562 */ (T_MASK ^ 0x09e1da9d)
#define T18   /* 0xc040b340 */ (T_MASK ^ 0x3fbf4cbf)
#define T19   0x265e5a51
#define T20   /* 0xe9b6c7aa */ (T_MASK ^ 0x16493855)
#define T21   /* 0xd62f105d */ (T_MASK ^ 0x29d0efa2)
#define T22   0x02441453
#define T23   /* 0xd8a1e681 */ (T_MASK ^ 0x275e197e)
#define T24   /* 0xe7d3fbc8 */ (T_MASK ^ 0x182c0437)
#define T25   0x21e1cde6
#define T26   /* 0xc33707d6 */ (T_MASK ^ 0x3cc8f829)
#define T27   /* 0xf4d50d87 */ (T_MASK ^ 0x0b2af278)
#define T28   0x455a14ed
#define T29   /* 0xa9e3e905 */ (T_MASK ^ 0x561c16fa)
#define T30   /* 0xfcefa3f8 */ (T_MASK ^ 0x03105c07)
#define T31   0x676f02d9
#define T32   /* 0x8d2a4c8a */ (T_MASK ^ 0x72d5b375)
#define T33   /* 0xfffa3942 */ (T_MASK ^ 0x0005c6bd)
#define T34   /* 0x8771f681 */ (T_MASK ^ 0x788e097e)
#define T35   0x6d9d6122
#define T36   /* 0xfde5380c */ (T_MASK ^ 0x021ac7f3)
#define T37   /* 0xa4beea44 */ (T_MASK ^ 0x5b4115bb)
#define T38   0x4bdecfa9
#define T39   /* 0xf6bb4b60 */ (T_MASK ^ 0x0944b49f)
#define T40   /* 0xbebfbc70 */ (T_MASK ^ 0x4140438f)
#define T41   0x289b7ec6
#define T42   /* 0xeaa127fa */ (T_MASK ^ 0x155ed805)
#define T43   /* 0xd4ef3085 */ (T_MASK ^ 0x2b10cf7a)
#define T44   0x04881d05
#define T45   /* 0xd9d4d039 */ (T_MASK ^ 0x262b2fc6)
#define T46   /* 0xe6db99e5 */ (T_MASK ^ 0x1924661a)
#define T47   0x1fa27cf8
#define T48   /* 0xc4ac5665 */ (T_MASK ^ 0x3b53a99a)
#define T49   /* 0xf4292244 */ (T_MASK ^ 0x0bd6ddbb)
#define T50   0x432aff97
#define T51   /* 0xab9423a7 */ (T_MASK ^ 0x546bdc58)
#define T52   /* 0xfc93a039 */ (T_MASK ^ 0x036c5fc6)
#define T53   0x655b59c3
#define T54   /* 0x8f0ccc92 */ (T_MASK ^ 0x70f3336d)
#define T55   /* 0xffeff47d */ (T_MASK ^ 0x00100b82)
#define T56   /* 0x85845dd1 */ (T_MASK ^ 0x7a7ba22e)
#define T57   0x6fa87e4f
#define T58   /* 0xfe2ce6e0 */ (T_MASK ^ 0x01d3191f)
#define T59   /* 0xa3014314 */ (T_MASK ^ 0x5cfebceb)
#define T60   0x4e0811a1
#define T61   /* 0xf7537e82 */ (T_MASK ^ 0x08ac817d)
#define T62   /* 0xbd3af235 */ (T_MASK ^ 0x42c50dca)
#define T63   0x2ad7d2bb
#define T64   /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)
#define ROTATE_LEFT(x, n)   (((x) << (n)) | ((x) >> (32 - (n))))
#define F(x, y, z)   (((x) & (y)) | (~(x) & (z)))
#define SET(a, b, c, d, k, s, Ti)
#define G(x, y, z)   (((x) & (z)) | ((y) & ~(z)))
#define SET(a, b, c, d, k, s, Ti)
#define H(x, y, z)   ((x) ^ (y) ^ (z))
#define SET(a, b, c, d, k, s, Ti)
#define I(x, y, z)   ((y) ^ ((x) | ~(z)))
#define SET(a, b, c, d, k, s, Ti)

Functions

static void md5_process (md5_state_t *pms, const md5_byte_t *data)
void md5_init (md5_state_t *pms)
void md5_append (md5_state_t *pms, const md5_byte_t *data, int nbytes)
void md5_finish (md5_state_t *pms, md5_byte_t digest[16])

Define Documentation

#define BYTE_ORDER   0

Definition at line 61 of file md5.c.

#define F (   x,
  y,
  z 
)    (((x) & (y)) | (~(x) & (z)))
#define G (   x,
  y,
  z 
)    (((x) & (z)) | ((y) & ~(z)))
#define H (   x,
  y,
  z 
)    ((x) ^ (y) ^ (z))
#define I (   x,
  y,
  z 
)    ((y) ^ ((x) | ~(z)))
#define ROTATE_LEFT (   x,
  n 
)    (((x) << (n)) | ((x) >> (32 - (n))))
#define SET (   a,
  b,
  c,
  d,
  k,
  s,
  Ti 
)
Value:
t = a + F(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
#define SET (   a,
  b,
  c,
  d,
  k,
  s,
  Ti 
)
Value:
t = a + G(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
#define SET (   a,
  b,
  c,
  d,
  k,
  s,
  Ti 
)
Value:
t = a + H(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
#define SET (   a,
  b,
  c,
  d,
  k,
  s,
  Ti 
)
Value:
t = a + I(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
#define T1   /* 0xd76aa478 */ (T_MASK ^ 0x28955b87)

Definition at line 65 of file md5.c.

#define T10   /* 0x8b44f7af */ (T_MASK ^ 0x74bb0850)

Definition at line 74 of file md5.c.

#define T11   /* 0xffff5bb1 */ (T_MASK ^ 0x0000a44e)

Definition at line 75 of file md5.c.

#define T12   /* 0x895cd7be */ (T_MASK ^ 0x76a32841)

Definition at line 76 of file md5.c.

#define T13   0x6b901122

Definition at line 77 of file md5.c.

#define T14   /* 0xfd987193 */ (T_MASK ^ 0x02678e6c)

Definition at line 78 of file md5.c.

#define T15   /* 0xa679438e */ (T_MASK ^ 0x5986bc71)

Definition at line 79 of file md5.c.

#define T16   0x49b40821

Definition at line 80 of file md5.c.

#define T17   /* 0xf61e2562 */ (T_MASK ^ 0x09e1da9d)

Definition at line 81 of file md5.c.

#define T18   /* 0xc040b340 */ (T_MASK ^ 0x3fbf4cbf)

Definition at line 82 of file md5.c.

#define T19   0x265e5a51

Definition at line 83 of file md5.c.

#define T2   /* 0xe8c7b756 */ (T_MASK ^ 0x173848a9)

Definition at line 66 of file md5.c.

#define T20   /* 0xe9b6c7aa */ (T_MASK ^ 0x16493855)

Definition at line 84 of file md5.c.

#define T21   /* 0xd62f105d */ (T_MASK ^ 0x29d0efa2)

Definition at line 85 of file md5.c.

#define T22   0x02441453

Definition at line 86 of file md5.c.

#define T23   /* 0xd8a1e681 */ (T_MASK ^ 0x275e197e)

Definition at line 87 of file md5.c.

#define T24   /* 0xe7d3fbc8 */ (T_MASK ^ 0x182c0437)

Definition at line 88 of file md5.c.

#define T25   0x21e1cde6

Definition at line 89 of file md5.c.

#define T26   /* 0xc33707d6 */ (T_MASK ^ 0x3cc8f829)

Definition at line 90 of file md5.c.

#define T27   /* 0xf4d50d87 */ (T_MASK ^ 0x0b2af278)

Definition at line 91 of file md5.c.

#define T28   0x455a14ed

Definition at line 92 of file md5.c.

#define T29   /* 0xa9e3e905 */ (T_MASK ^ 0x561c16fa)

Definition at line 93 of file md5.c.

#define T3   0x242070db

Definition at line 67 of file md5.c.

#define T30   /* 0xfcefa3f8 */ (T_MASK ^ 0x03105c07)

Definition at line 94 of file md5.c.

#define T31   0x676f02d9

Definition at line 95 of file md5.c.

#define T32   /* 0x8d2a4c8a */ (T_MASK ^ 0x72d5b375)

Definition at line 96 of file md5.c.

#define T33   /* 0xfffa3942 */ (T_MASK ^ 0x0005c6bd)

Definition at line 97 of file md5.c.

#define T34   /* 0x8771f681 */ (T_MASK ^ 0x788e097e)

Definition at line 98 of file md5.c.

#define T35   0x6d9d6122

Definition at line 99 of file md5.c.

#define T36   /* 0xfde5380c */ (T_MASK ^ 0x021ac7f3)

Definition at line 100 of file md5.c.

#define T37   /* 0xa4beea44 */ (T_MASK ^ 0x5b4115bb)

Definition at line 101 of file md5.c.

#define T38   0x4bdecfa9

Definition at line 102 of file md5.c.

#define T39   /* 0xf6bb4b60 */ (T_MASK ^ 0x0944b49f)

Definition at line 103 of file md5.c.

#define T4   /* 0xc1bdceee */ (T_MASK ^ 0x3e423111)

Definition at line 68 of file md5.c.

#define T40   /* 0xbebfbc70 */ (T_MASK ^ 0x4140438f)

Definition at line 104 of file md5.c.

#define T41   0x289b7ec6

Definition at line 105 of file md5.c.

#define T42   /* 0xeaa127fa */ (T_MASK ^ 0x155ed805)

Definition at line 106 of file md5.c.

#define T43   /* 0xd4ef3085 */ (T_MASK ^ 0x2b10cf7a)

Definition at line 107 of file md5.c.

#define T44   0x04881d05

Definition at line 108 of file md5.c.

#define T45   /* 0xd9d4d039 */ (T_MASK ^ 0x262b2fc6)

Definition at line 109 of file md5.c.

#define T46   /* 0xe6db99e5 */ (T_MASK ^ 0x1924661a)

Definition at line 110 of file md5.c.

#define T47   0x1fa27cf8

Definition at line 111 of file md5.c.

#define T48   /* 0xc4ac5665 */ (T_MASK ^ 0x3b53a99a)

Definition at line 112 of file md5.c.

#define T49   /* 0xf4292244 */ (T_MASK ^ 0x0bd6ddbb)

Definition at line 113 of file md5.c.

#define T5   /* 0xf57c0faf */ (T_MASK ^ 0x0a83f050)

Definition at line 69 of file md5.c.

#define T50   0x432aff97

Definition at line 114 of file md5.c.

#define T51   /* 0xab9423a7 */ (T_MASK ^ 0x546bdc58)

Definition at line 115 of file md5.c.

#define T52   /* 0xfc93a039 */ (T_MASK ^ 0x036c5fc6)

Definition at line 116 of file md5.c.

#define T53   0x655b59c3

Definition at line 117 of file md5.c.

#define T54   /* 0x8f0ccc92 */ (T_MASK ^ 0x70f3336d)

Definition at line 118 of file md5.c.

#define T55   /* 0xffeff47d */ (T_MASK ^ 0x00100b82)

Definition at line 119 of file md5.c.

#define T56   /* 0x85845dd1 */ (T_MASK ^ 0x7a7ba22e)

Definition at line 120 of file md5.c.

#define T57   0x6fa87e4f

Definition at line 121 of file md5.c.

#define T58   /* 0xfe2ce6e0 */ (T_MASK ^ 0x01d3191f)

Definition at line 122 of file md5.c.

#define T59   /* 0xa3014314 */ (T_MASK ^ 0x5cfebceb)

Definition at line 123 of file md5.c.

#define T6   0x4787c62a

Definition at line 70 of file md5.c.

#define T60   0x4e0811a1

Definition at line 124 of file md5.c.

#define T61   /* 0xf7537e82 */ (T_MASK ^ 0x08ac817d)

Definition at line 125 of file md5.c.

#define T62   /* 0xbd3af235 */ (T_MASK ^ 0x42c50dca)

Definition at line 126 of file md5.c.

#define T63   0x2ad7d2bb

Definition at line 127 of file md5.c.

#define T64   /* 0xeb86d391 */ (T_MASK ^ 0x14792c6e)

Definition at line 128 of file md5.c.

#define T7   /* 0xa8304613 */ (T_MASK ^ 0x57cfb9ec)

Definition at line 71 of file md5.c.

#define T8   /* 0xfd469501 */ (T_MASK ^ 0x02b96afe)

Definition at line 72 of file md5.c.

#define T9   0x698098d8

Definition at line 73 of file md5.c.

#define T_MASK   ((md5_word_t)~0)

Definition at line 64 of file md5.c.


Function Documentation

void md5_append ( md5_state_t pms,
const md5_byte_t data,
int  nbytes 
)

Definition at line 323 of file md5.c.

{
    const md5_byte_t *p = data;
    int left = nbytes;
    int offset = (pms->count[0] >> 3) & 63;
    md5_word_t nbits = (md5_word_t)(nbytes << 3);

    if (nbytes <= 0)
       return;

    /* Update the message length. */
    pms->count[1] += nbytes >> 29;
    pms->count[0] += nbits;
    if (pms->count[0] < nbits)
       pms->count[1]++;

    /* Process an initial partial block. */
    if (offset) {
       int copy = (offset + nbytes > 64 ? 64 - offset : nbytes);

       memcpy(pms->buf + offset, p, copy);
       if (offset + copy < 64)
           return;
       p += copy;
       left -= copy;
       md5_process(pms, pms->buf);
    }

    /* Process full blocks. */
    for (; left >= 64; p += 64, left -= 64)
       md5_process(pms, p);

    /* Process a final partial block. */
    if (left)
       memcpy(pms->buf, p, left);
}

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void md5_finish ( md5_state_t pms,
md5_byte_t  digest[16] 
)

Definition at line 361 of file md5.c.

{
    static const md5_byte_t pad[64] = {
       0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
    };
    md5_byte_t data[8];
    int i;

    /* Save the length before padding. */
    for (i = 0; i < 8; ++i)
       data[i] = (md5_byte_t)(pms->count[i >> 2] >> ((i & 3) << 3));
    /* Pad to 56 bytes mod 64. */
    md5_append(pms, pad, ((55 - (pms->count[0] >> 3)) & 63) + 1);
    /* Append the length. */
    md5_append(pms, data, 8);
    for (i = 0; i < 16; ++i)
       digest[i] = (md5_byte_t)(pms->abcd[i >> 2] >> ((i & 3) << 3));
}

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Definition at line 313 of file md5.c.

{
    pms->count[0] = pms->count[1] = 0;
    pms->abcd[0] = 0x67452301;
    pms->abcd[1] = /*0xefcdab89*/ T_MASK ^ 0x10325476;
    pms->abcd[2] = /*0x98badcfe*/ T_MASK ^ 0x67452301;
    pms->abcd[3] = 0x10325476;
}

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static void md5_process ( md5_state_t pms,
const md5_byte_t data 
) [static]

Definition at line 132 of file md5.c.

{
    md5_word_t
       a = pms->abcd[0], b = pms->abcd[1],
       c = pms->abcd[2], d = pms->abcd[3];
    md5_word_t t;
#if BYTE_ORDER > 0
    /* Define storage only for big-endian CPUs. */
    md5_word_t X[16];
#else
    /* Define storage for little-endian or both types of CPUs. */
    md5_word_t xbuf[16];
    const md5_word_t *X;
#endif

    {
#if BYTE_ORDER == 0
       /*
        * Determine dynamically whether this is a big-endian or
        * little-endian machine, since we can use a more efficient
        * algorithm on the latter.
        */
       static const int w = 1;

       if (*((const md5_byte_t *)&w)) /* dynamic little-endian */
#endif
#if BYTE_ORDER <= 0         /* little-endian */
       {
           /*
            * On little-endian machines, we can process properly aligned
            * data without copying it.
            */
           if (!((data - (const md5_byte_t *)0) & 3)) {
              /* data are properly aligned */
              X = (const md5_word_t *)data;
           } else {
              /* not aligned */
              memcpy(xbuf, data, 64);
              X = xbuf;
           }
       }
#endif
#if BYTE_ORDER == 0
       else                 /* dynamic big-endian */
#endif
#if BYTE_ORDER >= 0         /* big-endian */
       {
           /*
            * On big-endian machines, we must arrange the bytes in the
            * right order.
            */
           const md5_byte_t *xp = data;
           int i;

#  if BYTE_ORDER == 0
           X = xbuf;        /* (dynamic only) */
#  else
#    define xbuf X          /* (static only) */
#  endif
           for (i = 0; i < 16; ++i, xp += 4)
              xbuf[i] = xp[0] + (xp[1] << 8) + (xp[2] << 16) + (xp[3] << 24);
       }
#endif
    }

#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))

    /* Round 1. */
    /* Let [abcd k s i] denote the operation
       a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s). */
#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
#define SET(a, b, c, d, k, s, Ti)\
  t = a + F(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
    /* Do the following 16 operations. */
    SET(a, b, c, d,  0,  7,  T1);
    SET(d, a, b, c,  1, 12,  T2);
    SET(c, d, a, b,  2, 17,  T3);
    SET(b, c, d, a,  3, 22,  T4);
    SET(a, b, c, d,  4,  7,  T5);
    SET(d, a, b, c,  5, 12,  T6);
    SET(c, d, a, b,  6, 17,  T7);
    SET(b, c, d, a,  7, 22,  T8);
    SET(a, b, c, d,  8,  7,  T9);
    SET(d, a, b, c,  9, 12, T10);
    SET(c, d, a, b, 10, 17, T11);
    SET(b, c, d, a, 11, 22, T12);
    SET(a, b, c, d, 12,  7, T13);
    SET(d, a, b, c, 13, 12, T14);
    SET(c, d, a, b, 14, 17, T15);
    SET(b, c, d, a, 15, 22, T16);
#undef SET

     /* Round 2. */
     /* Let [abcd k s i] denote the operation
          a = b + ((a + G(b,c,d) + X[k] + T[i]) <<< s). */
#define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
#define SET(a, b, c, d, k, s, Ti)\
  t = a + G(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
     /* Do the following 16 operations. */
    SET(a, b, c, d,  1,  5, T17);
    SET(d, a, b, c,  6,  9, T18);
    SET(c, d, a, b, 11, 14, T19);
    SET(b, c, d, a,  0, 20, T20);
    SET(a, b, c, d,  5,  5, T21);
    SET(d, a, b, c, 10,  9, T22);
    SET(c, d, a, b, 15, 14, T23);
    SET(b, c, d, a,  4, 20, T24);
    SET(a, b, c, d,  9,  5, T25);
    SET(d, a, b, c, 14,  9, T26);
    SET(c, d, a, b,  3, 14, T27);
    SET(b, c, d, a,  8, 20, T28);
    SET(a, b, c, d, 13,  5, T29);
    SET(d, a, b, c,  2,  9, T30);
    SET(c, d, a, b,  7, 14, T31);
    SET(b, c, d, a, 12, 20, T32);
#undef SET

     /* Round 3. */
     /* Let [abcd k s t] denote the operation
          a = b + ((a + H(b,c,d) + X[k] + T[i]) <<< s). */
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define SET(a, b, c, d, k, s, Ti)\
  t = a + H(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
     /* Do the following 16 operations. */
    SET(a, b, c, d,  5,  4, T33);
    SET(d, a, b, c,  8, 11, T34);
    SET(c, d, a, b, 11, 16, T35);
    SET(b, c, d, a, 14, 23, T36);
    SET(a, b, c, d,  1,  4, T37);
    SET(d, a, b, c,  4, 11, T38);
    SET(c, d, a, b,  7, 16, T39);
    SET(b, c, d, a, 10, 23, T40);
    SET(a, b, c, d, 13,  4, T41);
    SET(d, a, b, c,  0, 11, T42);
    SET(c, d, a, b,  3, 16, T43);
    SET(b, c, d, a,  6, 23, T44);
    SET(a, b, c, d,  9,  4, T45);
    SET(d, a, b, c, 12, 11, T46);
    SET(c, d, a, b, 15, 16, T47);
    SET(b, c, d, a,  2, 23, T48);
#undef SET

     /* Round 4. */
     /* Let [abcd k s t] denote the operation
          a = b + ((a + I(b,c,d) + X[k] + T[i]) <<< s). */
#define I(x, y, z) ((y) ^ ((x) | ~(z)))
#define SET(a, b, c, d, k, s, Ti)\
  t = a + I(b,c,d) + X[k] + Ti;\
  a = ROTATE_LEFT(t, s) + b
     /* Do the following 16 operations. */
    SET(a, b, c, d,  0,  6, T49);
    SET(d, a, b, c,  7, 10, T50);
    SET(c, d, a, b, 14, 15, T51);
    SET(b, c, d, a,  5, 21, T52);
    SET(a, b, c, d, 12,  6, T53);
    SET(d, a, b, c,  3, 10, T54);
    SET(c, d, a, b, 10, 15, T55);
    SET(b, c, d, a,  1, 21, T56);
    SET(a, b, c, d,  8,  6, T57);
    SET(d, a, b, c, 15, 10, T58);
    SET(c, d, a, b,  6, 15, T59);
    SET(b, c, d, a, 13, 21, T60);
    SET(a, b, c, d,  4,  6, T61);
    SET(d, a, b, c, 11, 10, T62);
    SET(c, d, a, b,  2, 15, T63);
    SET(b, c, d, a,  9, 21, T64);
#undef SET

     /* Then perform the following additions. (That is increment each
        of the four registers by the value it had before this block
        was started.) */
    pms->abcd[0] += a;
    pms->abcd[1] += b;
    pms->abcd[2] += c;
    pms->abcd[3] += d;
}

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