hfsplus_case.c File Reference

#include "libisofs.h"

Include dependency graph for hfsplus_case.c:

Go to the source code of this file.

Functions
static int	what_page (uint16_t x)
static uint16_t	cmp_name_page0 (uint16_t x)
uint16_t	iso_hfsplus_cichar (uint16_t x)

Variables
static uint8_t	utf16be_transl []
	Maps UTF-16BE double-byte characters to the representative of their equivalence class under the relation of HFS+ case-insensitivity. More...
static int	utf16be_transl_count = 329
static int	utf16be_transl_starts []

Function Documentation

cmp_name_page0()

static uint16_t cmp_name_page0 ( uint16_t  x )

static

Definition at line 412 of file hfsplus_case.c.

{
    uint8_t *low;
 
    low = ((uint8_t *) &x) + 1;
    
    if (x == 0)
        return 0xffff;
    if (*low <= 0x40)
        ; 
    else if (*low <= 0x5a)
        *low = *low + 0x20;
    else if (*low < 0xc6)
        ;
    else if (*low == 0xc6)
        *low = 0xe6;
    else if (*low == 0xd0)
        *low = 0xf0;
    else if (*low == 0xd8)
        *low = 0xf8;
    else if (*low == 0xde)
        *low = 0xfe;
    return x;
}

Referenced by iso_hfsplus_cichar().

iso_hfsplus_cichar()

uint16_t iso_hfsplus_cichar

(

uint16_t

x

)

Definition at line 444 of file hfsplus_case.c.

{
    int page, i;
    uint16_t ret;
    uint8_t low, high;
 
    high = ((uint8_t *) &x)[0];
    low = ((uint8_t *) &x)[1];
 
    page = what_page(x);
    if (page < 0)
        return x; /* No translation needed */
    if (page == 0)
        return cmp_name_page0(x); /* Accelerator for ASCII subset */
 
    for (i = utf16be_transl_starts[page] * 4; i < utf16be_transl_count * 4;
         i += 4) {
        if (utf16be_transl[i] != high)
    break;
        if (utf16be_transl[i + 1] == low) { 
            ((uint8_t *) &ret)[0] = utf16be_transl[i + 2];
            ((uint8_t *) &ret)[1] = utf16be_transl[i + 3];
            return ret;
        }
    }
    return x;
}

References cmp_name_page0(), utf16be_transl, utf16be_transl_count, utf16be_transl_starts, and what_page().

Referenced by iso_get_hfsplus_name().

what_page()

static int what_page ( uint16_t  x )

static

Definition at line 380 of file hfsplus_case.c.

{
    switch(((uint8_t *) &x)[0]) {
    case 0:
        return 0;
    case 1:
        return 1;
    case 3:
        return 2;
    case 4:
        return 3;
    case 5:
        return 4;
    case 16:
        return 5;
    case 32:
        return 6;
    case 33:
        return 7;
    case 254:
        return 8;
    case 255:
        return 9;
    default:
        return -1; /* no mapping */
    }
}

Referenced by iso_hfsplus_cichar().

Variable Documentation

utf16be_transl

uint8_t utf16be_transl[]

static

Maps UTF-16BE double-byte characters to the representative of their equivalence class under the relation of HFS+ case-insensitivity.

Definition at line 35 of file hfsplus_case.c.

Referenced by iso_hfsplus_cichar().

utf16be_transl_count

int utf16be_transl_count = 329

static

Definition at line 367 of file hfsplus_case.c.

Referenced by iso_hfsplus_cichar().

utf16be_transl_starts

int utf16be_transl_starts[]

static

Initial value:

= {
  0, 31, 81, 112, 195, 233, 271, 286, 302, 303
}

Definition at line 375 of file hfsplus_case.c.

Referenced by iso_hfsplus_cichar().