libisofs-legacy/libisofs/util.h

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/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
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/* vim: set noet ts=8 sts=8 sw=8 : */
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/**
* Utility functions for the Libisofs library.
*/
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#ifndef LIBISO_UTIL_H
#define LIBISO_UTIL_H
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#include <stdint.h>
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#include <time.h>
#include <wchar.h>
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#ifndef MAX
# define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif
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#ifndef MIN
# define MIN(a, b) (((a) < (b)) ? (a) : (b))
#endif
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extern inline int div_up(int n, int div)
{
return (n + div - 1) / div;
}
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extern inline int round_up(int n, int mul)
{
return div_up(n, mul) * mul;
}
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wchar_t *towcs(const char *);
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char *str2ascii(const char*);
uint16_t *str2ucs(const char*);
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/**
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* Create a level 1 directory identifier.
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*/
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char *iso_1_dirid(const char *src);
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/**
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* Create a level 2 directory identifier.
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*/
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char *iso_2_dirid(const char *src);
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/**
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* Create a level 1 file identifier that consists of a name, extension and
* version number. The resulting string will have a file name of maximum
* length 8, followed by a separator (.), an optional extension of maximum
* length 3, followed by a separator (;) and a version number (digit 1).
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* @return NULL if the original name and extension both are of length 0.
*/
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char *iso_1_fileid(const char *src);
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/**
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* Create a level 2 file identifier that consists of a name, extension and
* version number. The combined file name and extension length will not exceed
* 30, the name and extension will be separated (.), and the extension will be
* followed by a separator (;) and a version number (digit 1).
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* @return NULL if the original name and extension both are of length 0.
*/
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char *iso_2_fileid(const char *src);
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/**
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* Create a Joliet file or directory identifier that consists of a name,
* extension and version number. The combined name and extension length will
* not exceed 128 bytes, the name and extension will be separated (.),
* and the extension will be followed by a separator (;) and a version number
* (digit 1). All characters consist of 2 bytes and the resulting string is
* NULL-terminated by a 2-byte NULL. Requires the locale to be set correctly.
*
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* @param size will be set to the size (in bytes) of the identifier.
* @return NULL if the original name and extension both are of length 0 or the conversion from the current codeset to UCS-2BE is not available.
*/
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uint16_t *iso_j_id(const char *src);
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/**
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* FIXME: what are the requirements for these next two? Is this for RR?
*
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* Create a POSIX portable file name that consists of a name and extension.
* The resulting file name will not exceed 250 characters.
* @return NULL if the original name and extension both are of length 0.
*/
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char *iso_p_fileid(const char *src);
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/**
* Create a POSIX portable directory name.
* The resulting directory name will not exceed 250 characters.
* @return NULL if the original name is of length 0.
*/
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char *iso_p_dirid(const char *src);
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void iso_lsb(uint8_t *buf, uint32_t num, int bytes);
void iso_msb(uint8_t *buf, uint32_t num, int bytes);
void iso_bb(uint8_t *buf, uint32_t num, int bytes);
uint32_t iso_read_lsb(const uint8_t *buf, int bytes);
uint32_t iso_read_msb(const uint8_t *buf, int bytes);
uint32_t iso_read_bb(const uint8_t *buf, int bytes);
/** Records the date/time into a 7 byte buffer (9.1.5) */
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void iso_datetime_7(uint8_t *buf, time_t t);
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/** Records the date/time into a 17 byte buffer (8.4.26.1) */
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void iso_datetime_17(uint8_t *buf, time_t t);
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time_t iso_datetime_read_7(const uint8_t *buf);
time_t iso_datetime_read_17(const uint8_t *buf);
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/**
* Like strlen, but for Joliet strings.
*/
size_t ucslen(const uint16_t *str);
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/**
* Like strcmp, but for Joliet strings.
*/
int ucscmp(const uint16_t *s1, const uint16_t *s2);
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#endif /* LIBISO_UTIL_H */