printf/apply_flag_functions.c at master · mag389/printf · GitHub

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#include "holberton.h"
/**
 * apply_left_align - apply left justification
 * Description: Converts text to left justification instead of default right
 * @text: String to format
 * Return: Formatted text
 */
char *apply_left_align(char *text)
{
	int index, adjust;

	if (!text)
		return (NULL);
	for (adjust = 0; *(text + adjust); adjust++)
	{
		if (*(text + adjust) != ' ')
			break;
	}
	if (adjust == _strlen(text))
		return (text);
	for (index = adjust; *(text + index); index++)
		*(text + index - adjust) = *(text + index);
	for (index--; adjust > 0 ; index--, adjust--)
		*(text + index) = ' ';
	return (text);
}
/**
 * apply_zero - apply zero formatting
 * Description: Applies '0' formatting to a given string.
 * @text: String to be formatted
 * Return: Formatted string
 */
char *apply_zero(char *text)
{
	int index = 0;

	if (!text)
		return (NULL);
	while (*(text + index))
	{
		if (*(text + index) != ' ')
			break;
		*(text + index) = '0';
		index++;
	}
	if (*(text + index) == '-')
	{
		*(text + index) = '0';
		*text = '-';
	}
	return (text);
}


/**
 * apply_hash - apply '#' formatting
 * Description: Puts a leading 0 in front of octal conversions if the first
 *              digit isn't already a 0. Puts a leading 0x for x conversions,
 *              or a leading 0X for X conversions.
 * @text: String to format
 * @type: Type specifier, should only be o, x, or X
 * Return: Formatted text
 */
char *apply_hash(char *text, char type)
{
	char *hash_text;
	int index, distance, needed;

	if (!text)
		return (NULL);
	needed = (type == 'o' ? 1 : 2);
	for (distance = 0; *(text + distance); distance++)
	{
		if (*(text + distance) != ' ')
			break;
	}
	if (distance - needed >= 0)
	{
		if (type == 'o')
			*(text + distance - 1) = '0';
		else
		{
			*(text + distance - 1) = (type == 'x' ? 'x' : 'X');
			*(text + distance - 2) = '0';
		}
		return (text);
	}
	needed = (distance - needed) * -1;
	hash_text = _calloc(_strlen(text) + needed + 1, 1, 0);
	if (!hash_text)
		return (NULL);
	if (type == 'o')
	{
		*hash_text = '0';
		for (index = 0; *(text + index); index++)
			*(hash_text + index + 1) = *(text + index);
	}
	else
	{
		*hash_text = '0';
		*(hash_text + 1) = (type == 'x' ? 'x' : 'X');
		for (index = 0; *(text + index); index++)
			*(hash_text + index + 2) = *(text + index);
	}
	free(text);
	return (hash_text);
}

/**
 * apply_sign - apply sign
 * Description: Applies either + or ' ' formatting to a string.
 * @text: String to be formatted
 * @flags: String of formatting flags present in parent formatting string.
 * Return: Formatted text
 */
char *apply_sign(char *text, char *flags)
{
	char *sign_text;
	int index;
	char flag;

	flag = (*(flags + 2) == '+' ? '+' : ' ');
	if (*text == '-')
		return (text);
	if (*text == ' ')
	{
		index = 0;
		while (*(text + index) == ' ')
			index++;
		*(text + index - 1) = '+';
		return (text);
	}
	if (*text == '0')
	{
		*text = flag;
		return (text);
	}

	sign_text = _calloc(_strlen(text) + 2, 1, '\0');
	if (!sign_text)
		return(NULL);
	*sign_text = flag;
	for (index = 0; *(text + index); index++)
		*(sign_text + index + 1) = *(text + index);
	free(text);
	return (sign_text);
}