strtoul.c

/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright 2001-2004, ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#define SYSCLIB_DISABLE_BUILTINS
#include <sysclib.h>
#include "sysclib_determine_base.h"
 
unsigned long strtoul(const char *s, char **endptr, int base)
{
    char *v3;
    unsigned int v6;
    int v7;
    int v8;
    char v9;
    int v10;
    char *v11;
 
    v3 = (char *)s;
    v6 = 0;
    if (!s)
    {
        return v6;
    }
    while (isspace(*v3) != 0)
    {
        v3 += 1;
    }
    if ((unsigned int)(base - 2) >= 0x23)
    {
        base = 0;
    }
    if (!base)
    {
        base = 10;
    }
    v7 = *v3;
    if (v7 != 48)
    {
        if (toupper(v7) == 79)
        {
            v3 += 1;
            base = 8;
        }
        goto LABEL_19;
    }
    v8 = *++v3;
    if (v8 == 88)
    {
        goto LABEL_15;
    }
    if (v8 < 89)
    {
        if (v8 != 66)
        {
            goto LABEL_19;
        }
        goto LABEL_16;
    }
    if (v8 == 98)
    {
LABEL_16:
        v3 += 1;
        base = 2;
        goto LABEL_19;
    }
    if (v8 == 120)
    {
LABEL_15:
        v3 += 1;
        base = 16;
    }
LABEL_19:
    while (1)
    {
        v9 = *v3++;
        v10 = sysclib_determine_base(v9);
        if (v10 >= base)
        {
            break;
        }
        v6 = v6 * base + v10;
    }
    v11 = v3 - 1;
    if (endptr)
    {
        *endptr = v11;
    }
    return v6;
}