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texmacs  1.0.7.15
Defines | Typedefs | Functions
numbers.h File Reference
#include <stdio.h>
#include <math.h>
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Defines

#define MAX(a, b)   ((a)>(b)?(a):(b))
#define MIN(a, b)   ((a)<(b)?(a):(b))
#define ISODD(n)   (((n)/2)*2!=(n))
#define ISEVEN(n)   (((n)/2)*2==(n))
#define M_PI   (4.0*atan(1.0))
#define ROUND(n, acc)   (floor(((double)n)/(acc)+0.5)*(acc))
#define round(v)   (floor((v) + 0.5))
#define trunc(v)   ((v) > 0.0 ? floor((v)) : ceil((v)))
#define round_at(v, acc)   (round(((double)(v))/(acc))*(acc))

Typedefs

typedef unsigned char Ubyte
typedef int UNSIGNED_BYTE
typedef int SIGNED_BYTE
typedef int SIGNED_PAIR
typedef unsigned UNSIGNED_PAIR
typedef long UNSIGNED_TRIPLE
typedef long SIGNED_TRIPLE
typedef long SIGNED_QUAD
typedef unsigned long UNSIGNED_QUAD
typedef signed long fixword

Functions

UNSIGNED_BYTE get_unsigned_byte (FILE *)
SIGNED_BYTE get_signed_byte (FILE *)
UNSIGNED_PAIR get_unsigned_pair (FILE *)
UNSIGNED_PAIR sget_unsigned_pair (unsigned char *)
SIGNED_PAIR get_signed_pair (FILE *)
UNSIGNED_TRIPLE get_unsigned_triple (FILE *)
SIGNED_TRIPLE get_signed_triple (FILE *)
SIGNED_QUAD get_signed_quad (FILE *)
UNSIGNED_QUAD get_unsigned_quad (FILE *)
SIGNED_QUAD sqxfw (SIGNED_QUAD sq, fixword fw)

Define Documentation

#define ISEVEN (   n)    (((n)/2)*2==(n))

Definition at line 64 of file numbers.h.

#define ISODD (   n)    (((n)/2)*2!=(n))

Definition at line 63 of file numbers.h.

#define M_PI   (4.0*atan(1.0))

Definition at line 67 of file numbers.h.

#define MAX (   a,
 
)    ((a)>(b)?(a):(b))

Definition at line 58 of file numbers.h.

#define MIN (   a,
 
)    ((a)<(b)?(a):(b))

Definition at line 61 of file numbers.h.

#define ROUND (   n,
  acc 
)    (floor(((double)n)/(acc)+0.5)*(acc))

Definition at line 70 of file numbers.h.

#define round (   v)    (floor((v) + 0.5))

Definition at line 78 of file numbers.h.

#define round_at (   v,
  acc 
)    (round(((double)(v))/(acc))*(acc))

Definition at line 84 of file numbers.h.

#define trunc (   v)    ((v) > 0.0 ? floor((v)) : ceil((v)))

Definition at line 81 of file numbers.h.


Typedef Documentation

typedef signed long fixword

Definition at line 50 of file numbers.h.

typedef int SIGNED_BYTE

Definition at line 32 of file numbers.h.

typedef int SIGNED_PAIR

Definition at line 32 of file numbers.h.

typedef long SIGNED_QUAD

Definition at line 34 of file numbers.h.

typedef long SIGNED_TRIPLE

Definition at line 34 of file numbers.h.

typedef unsigned char Ubyte

Definition at line 31 of file numbers.h.

typedef int UNSIGNED_BYTE

Definition at line 32 of file numbers.h.

typedef unsigned UNSIGNED_PAIR

Definition at line 33 of file numbers.h.

typedef unsigned long UNSIGNED_QUAD

Definition at line 35 of file numbers.h.

typedef long UNSIGNED_TRIPLE

Definition at line 34 of file numbers.h.


Function Documentation

Definition at line 45 of file numbers.c.

{
  int byte;
  byte = get_unsigned_byte(file);
  if (byte >= 0x80) 
    byte -= 0x100;
  return (SIGNED_BYTE) byte;
}

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Definition at line 78 of file numbers.c.

{
  int i;
  long pair = 0;
  for (i=0; i<2; i++) {
    pair = pair*0x100 + get_unsigned_byte(file);
  }
  if (pair >= 0x8000) {
    pair -= 0x10000l;
  }
  return (SIGNED_PAIR) pair;
}

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Definition at line 114 of file numbers.c.

{
  int byte, i;
  long quad = 0;

  /* Check sign on first byte before reading others */
  byte = get_unsigned_byte(file);
  quad = byte;
  if (quad >= 0x80) 
    quad = byte - 0x100;
  for (i=0; i<3; i++) {
    quad = quad*0x100 + get_unsigned_byte(file);
  }
  return (SIGNED_QUAD) quad;
}

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Definition at line 102 of file numbers.c.

{
  int i;
  long triple = 0;
  for (i=0; i<3; i++) {
    triple = triple*0x100 + get_unsigned_byte(file);
  }
  if (triple >= 0x800000l) 
    triple -= 0x1000000l;
  return (SIGNED_TRIPLE) triple;
}

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Definition at line 30 of file numbers.c.

{
  int ch;
  if ((ch = fgetc (file)) < 0)
    ERROR ("File ended prematurely\n");
  return (UNSIGNED_BYTE) ch;
}

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Definition at line 54 of file numbers.c.

{
  int i;
  UNSIGNED_BYTE byte;
  UNSIGNED_PAIR pair = 0;
  for (i=0; i<2; i++) {
    byte = get_unsigned_byte(file);
    pair = pair*0x100u + byte;
  }
  return pair;
}

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Definition at line 130 of file numbers.c.

{
  int i;
  unsigned long quad = 0;
  for (i=0; i<4; i++) {
    quad = quad*0x100u + get_unsigned_byte(file);
  }
  return (UNSIGNED_QUAD) quad;
}

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Definition at line 92 of file numbers.c.

{
  int i;
  long triple = 0;
  for (i=0; i<3; i++) {
    triple = triple*0x100u + get_unsigned_byte(file);
  }
  return (UNSIGNED_TRIPLE) triple;
}

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UNSIGNED_PAIR sget_unsigned_pair ( unsigned char *  )

Definition at line 66 of file numbers.c.

{
  int i;
  UNSIGNED_BYTE byte;
  UNSIGNED_PAIR pair = 0;
  for (i=0; i<2; i++) {
    byte = *(s++);
    pair = pair*0x100u + byte;
  }
  return pair;
}

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Definition at line 140 of file numbers.c.

{
  int sign = 1;
  unsigned long a, b, c, d, ad, bd, bc, ac;
  unsigned long e, f, g, h, i, j, k;
  unsigned long result;
  /* Make positive. */
  if (sq < 0) {
    sign = -sign;
    sq = -sq;
  }
  if (fw < 0) {
    sign = -sign;
    fw = -fw;
  }
  a = ((unsigned long) sq) >> 16u;
  b = ((unsigned long) sq) & 0xffffu;
  c = ((unsigned long) fw) >> 16u;
  d = ((unsigned long) fw) & 0xffffu;
  ad = a*d; bd = b*d; bc = b*c; ac = a*c;
  e = bd >> 16u;
  f = ad >> 16u;
  g = ad & 0xffffu;
  h = bc >> 16u;
  i = bc & 0xffffu;
  j = ac >> 16u;
  k = ac & 0xffffu;
  result = (e+g+i + (1<<3)) >> 4u;  /* 1<<3 is for rounding */
  result += (f+h+k) << 12u;
  result += j << 28u;
  return (sign > 0) ? result : result * -1L;
}

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