ft_printf

Restricted implementation of the printf function from the standard C library.

The prototype is int ft_printf(char *format, ...) where format is the format string that specifies how subsequent optional arguments are converted for output.

The format string is composed of zero or more directives: either ordinary characters that are simply copied to output or conversion specifications that start with an % and consist of the following:

%[flags][minimum field width][.precision][length modifier][conversion type]

Flags, minimum field width, precision and length modifier are optional. At its simplest, the conversion specification is of the form %[conversion type], e.g. %d. %% produces the % character.

Conversion type	Length modifier	Precision	Min. field width	Flags
d, i : signed decimal	default: int h: short hh: signed char l: long ll: long long	minimum number of digits; if only . is given, precision is taken as zero; if fewer digits are needed, the value is padded on the left with zeroes	if the converted value, with flags considered, has fewer characters than the field width (given as a decimal digit string), it will be padded with spaces on the left (or right, if the - flag has been given) to fill out the given field width.	+ add a plus sign in front of a non-negative number ' ' add a blank in front of a non-negative number; ignored if + is given 0 zero padding: padding on the left with '0's instead of blanks; ignored if precision or - is given - negative field width: values left-adjusted
o : unsigned octal	default: unsigned int h: unsigned short hh: unsigned char l: unsigned long ll: unsigned long long	-"-	-"-	# precision is increased (if needed) to force the first digit to be 0 0 zero padding; ignored if precision or - is given - negative field width
u : unsigned decimal	-"-	-"-	-"-	0 zero padding; ignored if precision or - is given - negative field width
x, X : unsigned hexadecimal	-"-	-"-	-"-	# non-zero result gets prefix "0x" or "0X" 0 zero padding; ignored if precision or - is given - negative field width
c : char (int converted to unsigned char)	default: int	-	-"-	- negative field width
s : character string (pointer to char array)	default: char*	maximum number of characters to print; if precision is specified and is less than the length of the array, the string does not have to be nul-terminated	-"-	- negative field width
f, F : double	default: double l: double L: long double	number of digits to appear after the decimal point; if precision is zero as in %.f or %.0f, only the integral part of the double will be printed; if precision is omitted, it is set to a default value of 6	-"-	# result contains a decimal point even if precision is set to zero + add a plus sign in front of a non-negative number ' ' add a blank in front of a non-negative number; ignored if + is given 0 zero padding; ignored if - is given - negative field width