wok annotate linld/stuff/src/ISO9660.CPP @ rev 23870

syslinux: update iso2exe.sh
author Pascal Bellard <pascal.bellard@slitaz.org>
date Tue Jun 23 08:04:01 2020 +0000 (2020-06-23)
parents a2e843f5d9e4
children 53914b720f76
rev   line source
pascal@19515 1 #include "crtl.h"
pascal@19515 2 #include "crtlx.h"
pascal@19515 3 #include "iso9660.h"
pascal@19515 4 #define __ROCKRIDGE
pascal@19515 5
pascal@20747 6 #if 1
pascal@20747 7 #define setdirofs(to,sec) (*(int*)((char*)&(to)+1) = *(int*)&(sec)<<(SECTORBITS-8))
pascal@20747 8 #define cpydirofs(to,from) (*(int*)((char*)&(to)+1) = *(int*)((char*)&(from)+1))
pascal@20747 9 #else
pascal@20747 10 #define setdirofs(to,sec) (to = (sec)<<SECTORBITS)
pascal@20747 11 #define cpydirofs(to,from) ((to) = (from))
pascal@20747 12 #endif
pascal@20747 13
pascal@23863 14 #ifdef ISOHOOK
pascal@23863 15 void isoroot(void)
pascal@23863 16 #else
pascal@21628 17 int isoroot(void)
pascal@23863 18 #endif
pascal@19515 19 {
pascal@19825 20 static const unsigned long root = 16UL * 2048;
pascal@23863 21 #ifdef ISOHOOK
pascal@23863 22 isoreadsector(&root);
pascal@23863 23 setdirofs(isostate.dirofs, (* (unsigned long *) (isostate.buffer + 0x9E)));
pascal@23863 24 isostate.dirsize = filesize2dirsize(* (unsigned long *) (isostate.buffer + 0xA6));
pascal@23863 25 #else
pascal@23863 26 if (isoreadsector(&root) == -1 || strhead(isostate.buffer+1,"CD001") == -1) {
pascal@23863 27 //close(isostate.fd);
pascal@19515 28 return -1;
pascal@19515 29 }
pascal@23863 30 setdirofs(isostate.dirofs, (* (unsigned long *) (isostate.buffer + 0x9E)));
pascal@23863 31 isostate.dirsize = filesize2dirsize(* (unsigned long *) (isostate.buffer + 0xA6));
pascal@19515 32 return 0;
pascal@23863 33 #endif
pascal@19515 34 }
pascal@19515 35
pascal@20747 36 int isoreaddir(void)
pascal@19515 37 {
pascal@19636 38 char *p;
pascal@23870 39
pascal@19571 40 struct isostate *x=&isostate;
pascal@19515 41
pascal@20747 42 if (x->curdirsize == 0xFFFF) {
pascal@19826 43 x->curdirsize = x->dirsize;
pascal@20747 44 cpydirofs(x->curdirofs, x->dirofs);
pascal@19826 45 goto restarted;
pascal@19515 46 }
pascal@20534 47 if (x->curpos >= SECTORSZ || * (short *) (x->buffer + x->curpos) == 0) {
pascal@20538 48 restarted:
pascal@19826 49 if (x->curdirsize < DIRSECTORSZ) return -1;
pascal@20534 50 isoreadsector(&x->curdirofs);
pascal@20453 51 //x->curdirofs += SECTORSZ;
pascal@20453 52 *(int *)((char *) &x->curdirofs+1) += SECTORSZ/256;
pascal@19826 53 x->curdirsize -= DIRSECTORSZ;
pascal@20458 54 x->curpos = 0;
pascal@19515 55 }
pascal@20534 56 p = x->buffer; p += x->curpos;
pascal@21735 57 if ((x->entrysize = * (short *) p) == 0) {
pascal@19515 58 return -1;
pascal@20538 59 }
pascal@19636 60 x->fileofs = (* (unsigned long *) (p + 2)) << SECTORBITS;
pascal@19636 61 x->filesize = * (unsigned long *) (p + 10);
pascal@20543 62 x->filemod = 0x81ED; if (p[25] & 2) ((char *)&(x->filemod))[1] = 0x41;
pascal@20543 63 //x->filemod = (p[25] & 2) ? 0040755 : 0100755;
pascal@20453 64 //x->filemod = 0100755 - ((p[25] & (char)2) << 13);
pascal@19515 65 #ifdef __ROCKRIDGE
pascal@19636 66 // p += 34 + (p[32] & -2); ?
pascal@20534 67 p = x->buffer + 34 + ((p[32] + x->curpos) & -2);
pascal@19515 68 do {
pascal@23870 69 register len = p[2];
pascal@20751 70 if (* (short *) p == 0x4D4E) {
pascal@20751 71 x->filename = p + 5;
pascal@23870 72 p[len] = 0;
pascal@23870 73 goto found;
pascal@19515 74 }
pascal@19636 75 p += len;
pascal@23870 76 #ifndef ISOHOOK
pascal@21735 77 } while (x->buffer + x->curpos + x->entrysize - 2 > p);
pascal@23867 78 #else
pascal@23870 79 } while (1);
pascal@19515 80 #endif
pascal@23867 81 #endif
pascal@23867 82 #ifndef ISOHOOK
pascal@19515 83 {
pascal@20534 84 p = x->buffer + 33; x->filename = p += x->curpos;
pascal@19636 85 p--;
pascal@20453 86 if (((* (short *) p) & 0xFEFF) -1 == 0) {
pascal@20453 87 x->filename = "..";
pascal@22632 88 if (--(* (short *) p) == 0)
pascal@20453 89 x->filename++;
pascal@20453 90 }
pascal@20453 91 else {
pascal@19636 92 p += *p; p--;
pascal@19636 93 if (* (short *) (p) != 0x313B) {
pascal@19636 94 p++; p++; // no ;1 to remove
pascal@19636 95 }
pascal@19636 96 if (p[-1] == '.') p--;
pascal@19636 97 *p = 0;
pascal@19515 98 }
pascal@19515 99 }
pascal@23867 100 #endif
pascal@23870 101 found:
pascal@21735 102 x->curpos += x->entrysize;
pascal@19515 103 return 0;
pascal@19515 104 }
pascal@19515 105
pascal@19825 106 //#define IS_DIR(x)( ((x) & ~0777) == 040000)
pascal@20454 107 //#define IS_DIR(x)( (char)((x) >> 9) == (char)040)
pascal@20454 108 //#define IS_DIR(x)( (*((char*) &x + 1) & (char)0776) == (char)0100)
pascal@20454 109 #define IS_DIR(x)( (*((char*) &x + 1) & (char)0676) == (char)0)
pascal@21628 110 int _isoopen(void)
pascal@19515 111 {
pascal@21735 112 // char *name, *s, c;
pascal@21735 113 // char _64bits = cpuhaslm();
pascal@19571 114 struct isostate *x=&isostate;
pascal@21735 115 #define name (x->filename2open)
pascal@21754 116 #define c (x->c)
pascal@21754 117 #define _64bits (x->_64bits)
pascal@21735 118 char *s;
pascal@19515 119
pascal@23806 120 #ifdef ISOHOOK
pascal@23806 121 extern int _cpuhaslm();
pascal@23806 122 _64bits = _cpuhaslm();
pascal@23806 123 #else
pascal@21735 124 _64bits = cpuhaslm();
pascal@23806 125 #endif
pascal@20528 126 do {
pascal@23863 127 #ifdef ISOHOOK
pascal@23863 128 s = (char *) x->filename2open;
pascal@23863 129 if (*s == '/') {
pascal@23863 130 s++;
pascal@23863 131 isoroot();
pascal@23863 132 }
pascal@23863 133 name = s;
pascal@23863 134 while (*++s);
pascal@23863 135 #else
pascal@21628 136 for (s = (char *) x->filename2open; *s == '/' ; s++) {
pascal@21628 137 isoroot();
pascal@19515 138 }
pascal@19825 139 next:
pascal@20751 140 name = s;
pascal@21754 141 do s++; while (*s && *s != '/');
pascal@21750 142 c = *s; *s = 0;
pascal@23863 143 #endif
pascal@21576 144 for (x->curdirsize = 0xFFFF; isoreaddir() != -1;) {
pascal@21735 145 const char *n = name;
pascal@21735 146 #define i (x->tmp)
pascal@21735 147 i = x->filename;
pascal@19825 148 if (_64bits) {
pascal@21628 149 if (strhead(i, n) == -1) continue;
pascal@19825 150 n = "64";
pascal@19825 151 i += s - name; // strlen(name);
pascal@19515 152 }
pascal@19825 153 if (strcmp(i, n)) continue;
pascal@23863 154 #ifndef ISOHOOK
pascal@19825 155 *s++ = c;
pascal@23863 156 #endif
pascal@19825 157 if (IS_DIR(x->filemod)) {
pascal@20747 158 cpydirofs(x->dirofs, x->fileofs);
pascal@19826 159 x->dirsize = filesize2dirsize(x->filesize);
pascal@23863 160 #ifndef ISOHOOK
pascal@19825 161 if (c) goto next;
pascal@23863 162 #endif
pascal@19515 163 }
pascal@19825 164 isolseek(&x->fileofs);
pascal@19825 165 return 0;
pascal@19515 166 }
pascal@20528 167 } while ((_64bits ^= CPUMASKLM) == 0);
pascal@19825 168 return -1;
pascal@19515 169 }