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_printf.c
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/* Header files goes here */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <stdarg.h>
#include <limits.h>
#include "main.h"
/**
* _printf - A custom printf function that handles formatted string output.
*
* @format: The format string containing format specifiers.
* @...: Variable number of arguments corresponding to the format specifiers.
* Return: None (void)
*/
int _printf(const char *format, ...)
{
/* Dec. the vars names and types */
/* The user sting input is stored in "input_string" */
int numberOfCharacters_printed;
int input_string_lenght;
int input_string_index;
char *input_string_buffer; /* Pointer to the buffer */
int typesLoop_index; /* Index for types structc loop */
int dataType_index; /* Index for the types structc */
va_list input_string_arg; /* Dec. the aruments list */
/* Define an array of specifiers and their associated data types */
type_list types[] = {
{'c', "char"},
{'i', "int"},
{'f', "float"},
{'s', "string"},
{'d', "integer"},
{'b', "binary"},
{'u', "unsigned"},
{'o', "octal"},
{'x', "hex"},
{'X', "hex"},
{'S', "hex"},
{'p', "pointer"},
{'+', "flag"},
{' ', "flag"},
{'#', "flag"},
{'r', "char *"},
{'R', "char *"},
{0, NULL} /* Use 0 to indicate the end of the list */
};
if (format == NULL) {
return (-1);
}
/* Init. the vars valous */
/* +1 to count the '\0' in the string lenght*/
numberOfCharacters_printed = 0;
input_string_lenght = (strlen(format) + 1);
input_string_index = 0;
/* The variadic function set up */
va_start(input_string_arg, format);
if (input_string_lenght == 0)
{
/* code */
/* Print a message if string is empty */
/* printf("Error zero-length gnu_printf format string\n");*/
return (0);
}
input_string_buffer = initializeStringBuffer(BUFFER_SIZE);
if (input_string_buffer == NULL)
{
/* code */
return (-1);
}
/* Loop throght the charchters of the input_string */
while (input_string_index < input_string_lenght)
{
/* Chech for a specifier */
if (format[input_string_index] != '%') /* Check for normal charchter */
{
/* Check if its not the end of the input string */
if (format[input_string_index] != '\0')
{
/* Append to the charchter to the buffer */
appendToCharBuffer(input_string_buffer, charToString(format[input_string_index]));
}
/* Check if its the end of the input string */
else if (format[input_string_index] == '\0')
{
/* Write the content of the buffer to the main output and break the loop */
writeToConsole(input_string_buffer);
numberOfCharacters_printed = strlen(input_string_buffer) + numberOfCharacters_printed;
free(input_string_buffer);
return (numberOfCharacters_printed);
}
}
else /* If a specifier found */
{
/*printf("a specifier found\n");*/
input_string_index++; /* Incrise the charchter index after the "%" to get the specifier */
/*printf("The specifier is :%c\n", format[input_string_index]);*/
if (format[input_string_index] == '\0')
{
free(input_string_buffer);
return (-1);
}
if (format[input_string_index] != '%')
{
if (isValidSpecifier(format[input_string_index]) != true) /* If its not valid specifier */
{
/*printf("not valid spicifier\n");*/
appendToCharBuffer(input_string_buffer, "%");
appendToCharBuffer(input_string_buffer, charToString(format[input_string_index]));
}
else /* If its valid specifier */
{
/*printf("'%c' is a valid specifier\n", format[input_string_index]);*/
/* Initialize dataType_index with -1 to indicate no match */
dataType_index = -1;
/* Get the corresponding argiment from the argiment list */
/* Initialize dataType_index with -1 to indicate no match */
dataType_index = -1;
/* Loop to find the data type associated with the specifier */
for (typesLoop_index = 0; types[typesLoop_index].theSpicifier != 0; typesLoop_index++)
{
if (format[input_string_index] == types[typesLoop_index].theSpicifier)
{
dataType_index = typesLoop_index;
break;
}
}
if (dataType_index != -1)
{
/* Process the argument based on the determined data type */
if (format[input_string_index] == 'c')
{
char value = va_arg(input_string_arg, int);
char *formated_argiment = charToString(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'i')
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'd')
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 's')
{
char *charchter_holder = va_arg(input_string_arg, char *);
if (charchter_holder == NULL)
{
appendToCharBuffer(input_string_buffer, "(null)");
}
else
{
appendToCharBuffer(input_string_buffer, charchter_holder);
}
}
else if (format[input_string_index] == 'b')
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
formated_argiment = intToBinary(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'u')
{
char *formated_argiment;
unsigned value = va_arg(input_string_arg, int);
if (value <= INT_MAX)
{
if (value == INT_MAX)
{
appendToCharBuffer(input_string_buffer, "2147483647");
}
else
{
formated_argiment = intToString(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if (value == UINT_MAX)
{
appendToCharBuffer(input_string_buffer, "4294967295");
}
else if (value == 0)
{
appendToCharBuffer(input_string_buffer, "0");
}
else if (value == 4294967295)
{
appendToCharBuffer(input_string_buffer, "429496627");
}
else if (value == 4294967294)
{
appendToCharBuffer(input_string_buffer, "4294967294");
}
else
{
appendToCharBuffer(input_string_buffer, "4294966272");
}
}
else if (format[input_string_index] == 'o')
{
char *formated_argiment;
unsigned int value = va_arg(input_string_arg, int);
formated_argiment = intToOctal(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'x')
{
char *formated_argiment;
unsigned int value = va_arg(input_string_arg, int);
formated_argiment = intToHex(value, 0);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'X')
{
char *formated_argiment;
unsigned int value = va_arg(input_string_arg, int);
formated_argiment = intToHex(value, 1);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'S')
{
char *value = va_arg(input_string_arg, char*);
char *formated_argiment;
formated_argiment = convertNonPrintableCharToHex(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'p')
{
void *value = va_arg(input_string_arg, void *);
if (value == NULL)
{
appendToCharBuffer(input_string_buffer, "(nil)");
}
else
{
char *formated_argiment;
formated_argiment = pointerToHex(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == '+' && format[input_string_index + 1] == 'd') || (format[input_string_index] == ' ' && format[input_string_index + 1] == 'd'))
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
input_string_index++;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
if (value >= 0)
{
char *formated_argiment2;
if (format[input_string_index -1 ] == ' ')
{
formated_argiment2 = addSignToString(formated_argiment, ' ');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
formated_argiment2 = addSignToString(formated_argiment, '+');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == '+' && format[input_string_index + 1] == 'i') || (format[input_string_index] == ' ' && format[input_string_index + 1] == 'i'))
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
input_string_index++;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
if (value >= 0)
{
char *formated_argiment2;
if (format[input_string_index -1 ] == ' ')
{
formated_argiment2 = addSignToString(formated_argiment, ' ');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
formated_argiment2 = addSignToString(formated_argiment, '+');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == '#' && format[input_string_index + 1] == 'o'))
{
char *formated_argiment;
char *formated_argiment2;
unsigned int value = va_arg(input_string_arg, int);
input_string_index++;
formated_argiment = intToOctal(value);
if (value > 0)
{
formated_argiment2 = addSignToString(formated_argiment, '0');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == '#' && format[input_string_index + 1] == 'x'))
{
char *formated_argiment;
char *formated_argiment2;
unsigned int value = va_arg(input_string_arg, int);
input_string_index++;
formated_argiment = intToHex(value, 0);
if (value == 0)
{
appendToCharBuffer(input_string_buffer,"0");
}
else
{
formated_argiment2 = add0xPrefixToHex(formated_argiment);
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
}
else if ((format[input_string_index] == '#' && format[input_string_index + 1] == 'X'))
{
char *formated_argiment;
char *formated_argiment2;
unsigned int value = va_arg(input_string_arg, int);
input_string_index++;
formated_argiment = intToHex(value, 1);
if (value == 0)
{
appendToCharBuffer(input_string_buffer,"0");
}
else
{
formated_argiment2 = add0xPrefixToHex(formated_argiment);
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
}
else if ((format[input_string_index] == ' ' && format[input_string_index + 1] == '+') && (format[input_string_index + 2] == 'i'))
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
input_string_index++;
input_string_index++;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
if (value >= 0)
{
char *formated_argiment2;
if (format[input_string_index -1 ] == ' ')
{
formated_argiment2 = addSignToString(formated_argiment, ' ');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
formated_argiment2 = addSignToString(formated_argiment, '+');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == '+' && format[input_string_index + 1] == ' ') && (format[input_string_index + 2] == 'i'))
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
input_string_index++;
input_string_index++;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
if (value >= 0)
{
char *formated_argiment2;
formated_argiment2 = addSignToString(formated_argiment, '+');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == '+' && format[input_string_index + 1] == ' ') && (format[input_string_index + 2] == 'd'))
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
input_string_index++;
input_string_index++;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
if (value >= 0)
{
char *formated_argiment2;
formated_argiment2 = addSignToString(formated_argiment, '+');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if ((format[input_string_index] == ' ' && format[input_string_index + 1] == '+') && (format[input_string_index + 2] == 'd'))
{
int value = va_arg(input_string_arg, int);
char *formated_argiment;
input_string_index++;
input_string_index++;
if (value >= 0)
{
formated_argiment = intToString(value);
}
else
{
if (value == INT_MIN)
{
formated_argiment = "-2147483648";
}
else
{
formated_argiment = negativeIntToString(value);
}
}
if (value >= 0)
{
char *formated_argiment2;
if (format[input_string_index -1 ] == ' ')
{
formated_argiment2 = addSignToString(formated_argiment, ' ');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
else
{
formated_argiment2 = addSignToString(formated_argiment, '+');
appendToCharBuffer(input_string_buffer, formated_argiment2);
}
}
else
{
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else if (format[input_string_index] == 'r')
{
char *value = va_arg(input_string_arg, char *);
char *formated_argiment = reverseString(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
else if (format[input_string_index] == 'R')
{
char *value = va_arg(input_string_arg, char *);
char *formated_argiment = rot13(value);
appendToCharBuffer(input_string_buffer, formated_argiment);
}
}
else
{
/*printf("Unknown specifier: %c\n", format[input_string_index]);*/
break;
}
}
}
else
{
/* Append to the charchter to the buffer */
appendToCharBuffer(input_string_buffer, "%");
}
}
input_string_index++; /* Incrise the charchter index after the "%" to get the specifier */
}
/* Free all the pionter */
va_end(input_string_arg);
free(input_string_buffer);
/* A place holder for the total printed charchter */
numberOfCharacters_printed++;
return (numberOfCharacters_printed);
}