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intToChar.cpp

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/********************************************************************
Description: little routines for converting strings<->integers
part of the 3Dsia project
created: StonedBones, ??.2.2000

History:
    date,   name,       changes,                    in funtion
    ??0200  StonedBones created source
    160200  StonedBones added charToInt

********************************************************************/

#include "intToChar.h"

#include <math.h>
#include <stdio.h>
#include <malloc.h>
#include <string.h>

/*...................................................................
Description: converts an integer to a string
Args: int i: integer to convert
Returns: string
Created: StonedBones, ??.2.2000
[ToDo:]
[Comments:]
Changes:
-------------------------------------------------------------------*/

char* intToChar (int i) {
    int   digits;
    int   vorz;
    int   j;
    int   m;
    
    if (i < 0) {
    j = -i;
    vorz = 0;
    } else {
    j = i;
    vorz = 1;
    };
    
    m = j;
    for (int a = 1; a < 10; a++) {
    if ((m / 10) < 1) {
        digits = a;
        a = 10;
    };
    m = m / 10;
    };
    
    
    char*  tmp;
    tmp = (char*) malloc (digits + 2 - vorz);
    
    m = j;
    for (int a = digits; a >= 1; a--) {
    tmp[a - vorz]= (char) (48 + (m % 10));
    m = m / 10;
    };
    
    if (vorz == 0) {
    tmp[0] = '-';
    };
    
    tmp[digits + 1 - vorz] = '\0';
    
    return tmp;
};

/*...................................................................
Description: converts a string to an integer
Args: char* s: string to convert
Returns: int
Created: StonedBones, 16.2.2000
[ToDo:]
[Comments:]
Changes:
-------------------------------------------------------------------*/

int charToInt (char* s) {
    int i;
    
    i = 0;
    
    for (int a = strlen (s); a >= 0; a--) {
    if ((s[a] >= '0') && (s[a] <= '9')) {
        i += (((int) s[a]) - 48) * ((int) pow (10.0, (double) (strlen (s) - a - 1)));
    };
    };
    
    if (strncmp (s, "=", 1) == 0) {
    i = 0 - i;
    };
    
    return i;
};

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