mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-24 23:56:49 +03:00
16f5992719
New functions for work with system calls KolibriOS are added. Functions for format output are added: printf (), fprintf (), sprintf (), snprintf (), vsnprintf (). For material numbers it is meanwhile supported only format output the (%f), and exponential output a (%e) is not realized yet. Functions for format output correctly work only in GCC because TinyC incorrectly works with the functions containing variable number of arguments. git-svn-id: svn://kolibrios.org@647 a494cfbc-eb01-0410-851d-a64ba20cac60
189 lines
2.8 KiB
C
189 lines
2.8 KiB
C
#include <stdio.h>
|
|
void skipspaces(FILE* file)
|
|
{
|
|
int c;
|
|
while(1)
|
|
{
|
|
c=getc(file);
|
|
if (c!=' ' && c!='\r' && c!='\n')
|
|
{
|
|
ungetc(c,file);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
int fscanf(FILE* file,const char* format, ...)
|
|
{
|
|
int res;
|
|
void* arg;
|
|
int i;
|
|
int c;
|
|
int contflag;
|
|
int longflag;
|
|
int sign;
|
|
long long number;
|
|
long double rnumber;
|
|
char* str;
|
|
res=0;
|
|
arg=&format;
|
|
arg+=sizeof(const char*);
|
|
while (*format!='\0')
|
|
{
|
|
if (*format!='%')
|
|
{
|
|
c=fgetc(file);
|
|
if (c!=*format)
|
|
{
|
|
fungetc(c,file);
|
|
return -1;
|
|
}
|
|
format++;
|
|
continue;
|
|
}
|
|
contflag=1;
|
|
longflag=0;
|
|
while (*format && contflag)
|
|
{
|
|
switch(*format)
|
|
{
|
|
case '.':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
format++;
|
|
continue;
|
|
break;
|
|
case 'l':
|
|
if (longflag==0)
|
|
longflag=1;
|
|
else
|
|
longflag=2;
|
|
format++;
|
|
break;
|
|
case 'L':
|
|
longflag=2;
|
|
format++;
|
|
break;
|
|
case 'f':
|
|
case 'd':
|
|
case 'c':
|
|
case 's':
|
|
case '%':
|
|
contflag=0;
|
|
break;
|
|
default:
|
|
contflag=0;
|
|
}
|
|
}
|
|
if (contflag)
|
|
break;
|
|
switch(*format)
|
|
{
|
|
case '%':
|
|
c=fgetc(file);
|
|
if (c!='%')
|
|
{
|
|
ungetc(c,file);
|
|
return -1;
|
|
}
|
|
res--;
|
|
break;
|
|
case 'd':
|
|
number=0;
|
|
sign=1;
|
|
skipspaces(file);
|
|
c=fgetc(file);
|
|
if (c=='-')
|
|
{
|
|
sign=-1;
|
|
}else if (c!='+')
|
|
ungetc(c,file);
|
|
contflag=0;
|
|
while(1)
|
|
{
|
|
c=fgetc(file);
|
|
if (c>='0' && c<='9')
|
|
{
|
|
contflag++;
|
|
number=number*10+(c-'0');
|
|
}else
|
|
break;
|
|
}
|
|
ungetc(c,file);
|
|
if (!contflag)
|
|
return res;
|
|
if (longflag<=1)
|
|
{
|
|
*((int*)arg)=number;
|
|
arg+=sizeof(int);
|
|
}else
|
|
{
|
|
*((long long*)arg)=number;
|
|
arg+=sizeof(long long);
|
|
}
|
|
break;
|
|
case 'c':
|
|
c=fgetc(file);
|
|
if (c==EOF)
|
|
return res;
|
|
*((char*)arg)=c;
|
|
arg+=sizeof(char);
|
|
break;
|
|
case 's':
|
|
skipspaces(file);
|
|
contflag=0;
|
|
str=*((char**)arg);
|
|
arg+=sizeof(char*);
|
|
while(1)
|
|
{
|
|
c=fgetc(file);
|
|
if (c==EOF || c==' ' || c=='\n' || c=='\r')
|
|
{
|
|
ungetc(c,file);
|
|
break;
|
|
}
|
|
*str=c;
|
|
str++;
|
|
contflag++;
|
|
}
|
|
if (!contflag)
|
|
return res;
|
|
break;
|
|
case 'f':
|
|
skipspaces(file);
|
|
// TODO: read real numbers
|
|
rnumber=0;
|
|
switch (longflag)
|
|
{
|
|
case 0:
|
|
*((float*)arg)=rnumber;
|
|
arg+=sizeof(float);
|
|
break;
|
|
case 1:
|
|
*((double*)arg)=rnumber;
|
|
arg+=sizeof(double);
|
|
break;
|
|
case 2:
|
|
*((long double*)arg)=rnumber;
|
|
arg+=sizeof(long double);
|
|
break;
|
|
default:
|
|
return res;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
format++;
|
|
res++;
|
|
}
|
|
return res;
|
|
}
|