tfVSScanF

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#include <trsocket.h>

int tfVSScanF	(
	const char TM_FAR * buf0,
	const char TM_FAR * fmt0,
	va_list ap
	);

Function Description

This function is used to parse a string. It is similar to tfSScanF() except that it takes a va_list structure as its third parameter rather than a variable length list of arguments.

Format Specifiers:

Code	Description
%c	Read a character. White space characters are not read unless %c is used
%d	Read a decimal number
%e	Read a floating-point number. It can have a + or - sign. It can also be a series of digits with a decimal point and an exponent (e or E) followed by a signed or unsigned integer
%f	Read a floating-point number. It can have a + or - sign. It can also be a series of digits with a decimal point and an exponent (e or E) followed by a signed or unsigned integer
%g	Read a floating-point number. It can have a + or - sign. It can also be a series of digits with a decimal point and an exponent (e or E) followed by a signed or unsigned integer
%i	Read a decimal integer
%n	Use an integer number to express the number of bytes successfully read
%o	Read an octal number
%p	Read a pointer (platform specific)
%s	Read a string
%u	Read an unsigned decimal integer
%x	Read a hexidecmal number
%[]	Read a set of characters

Parameters

• buf0

  The string to be parsed.

• fmt0

  The string containing the format specifiers dictating which type of data is to be read.

• ap

  A va_list structure containing the variables referred to by the format specifiers.

Returns

• int

  The number of input fields that were both formatted and assigned a value.

• EOF

  Failure.

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