ReactOS  0.4.14-dev-342-gdc047f9
fcvtbuf.c File Reference
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <float.h>
#include <math.h>
#include <malloc.h>
Include dependency graph for fcvtbuf.c:

Go to the source code of this file.

Macros

#define CVTBUFSIZE   2 * DBL_MAX_10_EXP + 10
 

Functions

static charcvt (double arg, int ndigits, int *decpt, int *sign, char *buf, int eflag)
 
charfcvtbuf (double arg, int ndigits, int *decpt, int *sign, char *buf)
 

Macro Definition Documentation

◆ CVTBUFSIZE

#define CVTBUFSIZE   2 * DBL_MAX_10_EXP + 10

Definition at line 44 of file fcvtbuf.c.

Function Documentation

◆ cvt()

static char* cvt ( double  arg,
int  ndigits,
int decpt,
int sign,
char buf,
int  eflag 
)
static

Definition at line 45 of file fcvtbuf.c.

46 {
47  int r2;
48  double fi, fj;
49  char *p, *p1;
50 
51  if (ndigits >= CVTBUFSIZE - 1) ndigits = CVTBUFSIZE - 2;
52  r2 = 0;
53  *sign = 0;
54  p = &buf[0];
55  if (arg < 0)
56  {
57  *sign = 1;
58  arg = -arg;
59  }
60  arg = modf(arg, &fi);
61  p1 = &buf[CVTBUFSIZE];
62 
63  if (fi != 0)
64  {
65  p1 = &buf[CVTBUFSIZE];
66  while (fi != 0)
67  {
68  fj = modf(fi / 10, &fi);
69  *--p1 = (int)((fj + .03) * 10) + '0';
70  r2++;
71  }
72  while (p1 < &buf[CVTBUFSIZE]) *p++ = *p1++;
73  }
74  else if (arg > 0)
75  {
76  while ((fj = arg * 10) < 1)
77  {
78  arg = fj;
79  r2--;
80  }
81  }
82  p1 = &buf[ndigits];
83  if (eflag == 0) p1 += r2;
84  *decpt = r2;
85  if (p1 < &buf[0])
86  {
87  buf[0] = '\0';
88  return buf;
89  }
90  while (p <= p1 && p < &buf[CVTBUFSIZE])
91  {
92  arg *= 10;
93  arg = modf(arg, &fj);
94  *p++ = (int) fj + '0';
95  }
96  if (p1 >= &buf[CVTBUFSIZE])
97  {
98  buf[CVTBUFSIZE - 1] = '\0';
99  return buf;
100  }
101  p = p1;
102  *p1 += 5;
103  while (*p1 > '9')
104  {
105  *p1 = '0';
106  if (p1 > buf)
107  ++*--p1;
108  else
109  {
110  *p1 = '1';
111  (*decpt)++;
112  if (eflag == 0)
113  {
114  if (p > buf) *p = '0';
115  p++;
116  }
117  }
118  }
119  *p = '\0';
120  return buf;
121 }
static size_t double int int int * sign
Definition: printf.c:69
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
void * arg
Definition: msvc.h:12
static size_t double int int * decpt
Definition: printf.c:69
#define CVTBUFSIZE
Definition: fcvtbuf.c:44
static size_t double int ndigits
Definition: printf.c:69
static DNS_RECORDW r2
Definition: record.c:38
GLfloat GLfloat p
Definition: glext.h:8902
_Check_return_ _CRTIMP double __cdecl modf(_In_ double x, _Out_ double *y)
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31

Referenced by fcvtbuf(), _Locale_impl::insert_ctype_facets(), and CodecvtTest::special_encodings().

◆ fcvtbuf()

char* fcvtbuf ( double  arg,
int  ndigits,
int decpt,
int sign,
char buf 
)

Definition at line 123 of file fcvtbuf.c.

124 {
125  return cvt(arg, ndigits, decpt, sign, buf, 0);
126 }
static size_t double int int int * sign
Definition: printf.c:69
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
static size_t double int int * decpt
Definition: printf.c:69
static size_t double int ndigits
Definition: printf.c:69
static char * cvt(double arg, int ndigits, int *decpt, int *sign, char *buf, int eflag)
Definition: fcvtbuf.c:45

Referenced by _fcvt().