printf/convert_misc.c at master · mKleinCreative/printf · GitHub

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/*
 * File: convert_misc.c
 * Auth: Brennan D Baraban
 */

#include "holberton.h"

unsigned int convert_c(va_list args, buffer_t *output,
		unsigned char flags, char wid, char prec, unsigned char len);
unsigned int convert_percent(va_list args, buffer_t *output,
		unsigned char flags, char wid, char prec, unsigned char len);
unsigned int convert_p(va_list args, buffer_t *output,
		unsigned char flags, char wid, char prec, unsigned char len);

/**
 * convert_c - Converts an argument to an unsigned char and
 *             stores it to a buffer contained in a struct.
 * @args: A va_list pointing to the argument to be converted.
 * @flags: Flag modifiers.
 * @wid: A width modifier.
 * @prec: A precision modifier.
 * @len: A length modifier.
 * @output: A buffer_t struct containing a character array.
 *
 * Return: The number of bytes stored to the buffer.
 */
unsigned int convert_c(va_list args, buffer_t *output,
		unsigned char flags, char wid, char prec, unsigned char len)
{
	char c, width = ' ';
	unsigned int ret = 0;

	c = va_arg(args, int);

	(void)prec;
	(void)len;

	if (NEG_FLAG == 0)
	{
		for (; wid > 1; wid--)
			ret += _memcpy(output, &width, 1);
	}

	ret += _memcpy(output, &c, 1);

	if (NEG_FLAG == 1)
	{
		for (wid -= ret; wid > 0; wid--)
			ret += _memcpy(output, &width, 1);
	}

	return (ret);
}

/**
 * convert_percent - Stores a percent sign to a
 *                   buffer contained in a struct.
 * @args: A va_list pointing to the argument to be converted.
 * @flags: Flag modifiers.
 * @wid: A width modifier.
 * @prec: A precision modifier.
 * @len: A length modifier.
 * @output: A buffer_t struct containing a character array.
 *
 * Return: The number of bytes stored to the buffer (always 1).
 */
unsigned int convert_percent(va_list args, buffer_t *output,
		unsigned char flags, char wid, char prec, unsigned char len)
{
	char percent = '%', width = ' ';
	unsigned int ret = 0;

	(void)args;
	(void)prec;
	(void)len;

	if (NEG_FLAG == 0)
	{
		for (; wid > 1; wid--)
			ret += _memcpy(output, &width, 1);
	}

	ret += _memcpy(output, &percent, 1);

	if (NEG_FLAG == 1)
	{
		for (wid -= ret; wid > 1; wid--)
			ret += _memcpy(output, &width, 1);
	}

	return (ret);
}

/**
 * convert_p - Converts the address of an argument to hex and
 *             stores it to a buffer contained in a struct.
 * @args: A va_list pointing to the argument to be converted.
 * @flags: Flag modifiers.
 * @wid: A width modifier.
 * @prec: A precision modifier.
 * @len: A length modifier.
 * @output: A buffer_t struct containing a character array.
 *
 * Return: The number of bytes stored to the buffer.
 */
unsigned int convert_p(va_list args, buffer_t *output,
		unsigned char flags, char wid, char prec, unsigned char len)
{
	char *null = "(nil)", width = ' ';
	unsigned long int address;
	unsigned int ret = 0;

	(void)len;

	address = va_arg(args, unsigned long int);
	if (address == '\0')
		return (_memcpy(output, null, 5));

	flags |= 32;

	ret += convert_ubase(output, address, "0123456789abcdef",
			flags, wid, prec);

	if (NEG_FLAG == 1)
	{
		for (wid -= ret; wid > 0; wid--)
			ret += _memcpy(output, &width, 1);
	}

	return (ret);
}