source: soft/giet_vm/giet_libs/stdlib.c @ 270

Last change on this file since 270 was 259, checked in by devigne, 11 years ago

giet_fat32/fat32.c :
Added _fat_write function. At the moment it does not support the creation of a
new file (the writing must exist in the disk image) and does not support the
allocation of additional cluster from the original file.

create_dmg :
Bug fix for support Linux (The tree files were not consistent with the
pathnames in boot.c).

giet_libs/stdlib.c and stdlib.h :
Added stdlib file. At the moment they only contain the atoi function.

giet_libs/stdio.h :
Bug fix in SYSCALL DEFINE. SYSCALL_FAT_READ, WRITE, CLOSE, LSEEK had the same
value.

Makefile :
Added compilation line for stdlib.o

File size: 1.2 KB
Line 
1//////////////////////////////////////////////////////////////////////////////////
2// File     : stdlib.c
3// Date     : 05/12/2013
4// Author   : Clément DEVIGNE
5// Copyright (c) UPMC-LIP6
6///////////////////////////////////////////////////////////////////////////////////
7
8///////////////////////////////////////////////////////////////////////////////////
9// int atoi ( char * str )
10///////////////////////////////////////////////////////////////////////////////////
11       
12int atoi(char *str)
13{
14    int res  = 0; // Initialize result
15    int sign = 1; // Initialize sign as positive
16    int i    = 0; // Initialize index of first digit
17
18    if (str[0] == '-') //If number is negative, then update sign
19    {
20        sign = -1; 
21        i++;           // Also update index of first digit
22    }
23
24    for (; str[i] != '\0'; ++i) // Iterate through all digits and update the result
25    {
26        res = res*10 + str[i] - '0';
27    }
28
29    // Return result with sign
30    return sign*res;
31}
32       
33// Local Variables:
34// tab-width: 4
35// c-basic-offset: 4
36// c-file-offsets:((innamespace . 0)(inline-open . 0))
37// indent-tabs-mode: nil
38// End:
39// vim: filetype=c:expandtab:shiftwidth=4:tabstop=4:softtabstop=4
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