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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [isofs/] [util.c] - Blame information for rev 1765

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/*
 *  linux/fs/isofs/util.c
 *
 *  The special functions in the file are numbered according to the section
 *  of the iso 9660 standard in which they are described.  isonum_733 will
 *  convert numbers according to section 7.3.3, etc.
 *
 *  isofs special functions.  This file was lifted in its entirety from
 *  the 386bsd iso9660 filesystem, by Pace Willisson <pace@blitz.com>.
 */
 
#include <linux/time.h>
 
int
isonum_711 (char * p)
{
        return (*p & 0xff);
}
 
int
isonum_712 (char * p)
{
        int val;
 
        val = *p;
        if (val & 0x80)
                val |= 0xffffff00;
        return (val);
}
 
int
isonum_721 (char * p)
{
        return ((p[0] & 0xff) | ((p[1] & 0xff) << 8));
}
 
int
isonum_722 (char * p)
{
        return (((p[0] & 0xff) << 8) | (p[1] & 0xff));
}
 
int
isonum_723 (char * p)
{
#if 0
        if (p[0] != p[3] || p[1] != p[2]) {
                fprintf (stderr, "invalid format 7.2.3 number\n");
                exit (1);
        }
#endif
        return (isonum_721 (p));
}
 
int
isonum_731 (char * p)
{
        return ((p[0] & 0xff)
                | ((p[1] & 0xff) << 8)
                | ((p[2] & 0xff) << 16)
                | ((p[3] & 0xff) << 24));
}
 
int
isonum_732 (char * p)
{
        return (((p[0] & 0xff) << 24)
                | ((p[1] & 0xff) << 16)
                | ((p[2] & 0xff) << 8)
                | (p[3] & 0xff));
}
 
int
isonum_733 (char * p)
{
#if 0
        int i;
 
        for (i = 0; i < 4; i++) {
                if (p[i] != p[7-i]) {
                        fprintf (stderr, "bad format 7.3.3 number\n");
                        exit (1);
                }
        }
#endif
        return (isonum_731 (p));
}
 
/* We have to convert from a MM/DD/YY format to the unix ctime format.
 * We have to take into account leap years and all of that good stuff.
 */
int iso_date(char * p, int flag)
{
        int year, month, day, hour ,minute, second, tz;
        int crtime, days, i;
 
        year = p[0] - 70;
        month = p[1];
        day = p[2];
        hour = p[3];
        minute = p[4];
        second = p[5];
        if (flag == 0) tz = p[6]; /* High sierra has no time zone */
        else tz = 0;
 
        if (year < 0) {
                crtime = 0;
        } else {
                int monlen[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
                extern struct timezone sys_tz;
 
                days = year * 365;
                if (year > 2)
                        days += (year+1) / 4;
                for (i = 1; i < month; i++)
                        days += monlen[i-1];
                if (((year+2) % 4) == 0 && month > 2)
                        days++;
                days += day - 1;
                crtime = ((((days * 24) + hour) * 60 + minute) * 60)
                        + second;
                if (sys_tz.tz_dsttime)
                        crtime -= 3600;
 
                /* sign extend */
                if (tz & 0x80)
                        tz |= (-1 << 8);
 
                /* timezone offset is unreliable on some disks */
                if (-48 <= tz && tz <= 52)
                        crtime += tz * 15 * 60;
        }
        return crtime;
}
 

Line No.	Rev	Author	Line
1	1628	jcastillo	`/*`
2			`* linux/fs/isofs/util.c`
3			`*`
4			`* The special functions in the file are numbered according to the section`
5			`* of the iso 9660 standard in which they are described. isonum_733 will`
6			`* convert numbers according to section 7.3.3, etc.`
7			`*`
8			`* isofs special functions. This file was lifted in its entirety from`
9			`* the 386bsd iso9660 filesystem, by Pace Willisson <pace@blitz.com>.`
10			`*/`
11
12			`#include <linux/time.h>`
13
14			`int`
15			`isonum_711 (char * p)`
16			`{`
17			`return (*p & 0xff);`
18			`}`
19
20			`int`
21			`isonum_712 (char * p)`
22			`{`
23			`int val;`
24
25			`val = *p;`
26			`if (val & 0x80)`
27			`val \|= 0xffffff00;`
28			`return (val);`
29			`}`
30
31			`int`
32			`isonum_721 (char * p)`
33			`{`
34			`return ((p[0] & 0xff) \| ((p[1] & 0xff) << 8));`
35			`}`
36
37			`int`
38			`isonum_722 (char * p)`
39			`{`
40			`return (((p[0] & 0xff) << 8) \| (p[1] & 0xff));`
41			`}`
42
43			`int`
44			`isonum_723 (char * p)`
45			`{`
46			`#if 0`
47			`if (p[0] != p[3] \|\| p[1] != p[2]) {`
48			`fprintf (stderr, "invalid format 7.2.3 number\n");`
49			`exit (1);`
50			`}`
51			`#endif`
52			`return (isonum_721 (p));`
53			`}`
54
55			`int`
56			`isonum_731 (char * p)`
57			`{`
58			`return ((p[0] & 0xff)`
59			`\| ((p[1] & 0xff) << 8)`
60			`\| ((p[2] & 0xff) << 16)`
61			`\| ((p[3] & 0xff) << 24));`
62			`}`
63
64			`int`
65			`isonum_732 (char * p)`
66			`{`
67			`return (((p[0] & 0xff) << 24)`
68			`\| ((p[1] & 0xff) << 16)`
69			`\| ((p[2] & 0xff) << 8)`
70			`\| (p[3] & 0xff));`
71			`}`
72
73			`int`
74			`isonum_733 (char * p)`
75			`{`
76			`#if 0`
77			`int i;`
78
79			`for (i = 0; i < 4; i++) {`
80			`if (p[i] != p[7-i]) {`
81			`fprintf (stderr, "bad format 7.3.3 number\n");`
82			`exit (1);`
83			`}`
84			`}`
85			`#endif`
86			`return (isonum_731 (p));`
87			`}`
88
89			`/* We have to convert from a MM/DD/YY format to the unix ctime format.`
90			`* We have to take into account leap years and all of that good stuff.`
91			`*/`
92			`int iso_date(char * p, int flag)`
93			`{`
94			`int year, month, day, hour ,minute, second, tz;`
95			`int crtime, days, i;`
96
97			`year = p[0] - 70;`
98			`month = p[1];`
99			`day = p[2];`
100			`hour = p[3];`
101			`minute = p[4];`
102			`second = p[5];`
103			`if (flag == 0) tz = p[6]; /* High sierra has no time zone */`
104			`else tz = 0;`
105
106			`if (year < 0) {`
107			`crtime = 0;`
108			`} else {`
109			`int monlen[12] = {31,28,31,30,31,30,31,31,30,31,30,31};`
110			`extern struct timezone sys_tz;`
111
112			`days = year * 365;`
113			`if (year > 2)`
114			`days += (year+1) / 4;`
115			`for (i = 1; i < month; i++)`
116			`days += monlen[i-1];`
117			`if (((year+2) % 4) == 0 && month > 2)`
118			`days++;`
119			`days += day - 1;`
120			`crtime = ((((days * 24) + hour) * 60 + minute) * 60)`
121			`+ second;`
122			`if (sys_tz.tz_dsttime)`
123			`crtime -= 3600;`
124
125			`/* sign extend */`
126			`if (tz & 0x80)`
127			`tz \|= (-1 << 8);`
128
129			`/* timezone offset is unreliable on some disks */`
130			`if (-48 <= tz && tz <= 52)`
131			`crtime += tz * 15 * 60;`
132			`}`
133			`return crtime;`
134			`}`
135

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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [fs/] [isofs/] [util.c] - Blame information for rev 1765