wok annotate linld/stuff/src/ISO9660.CPP @ rev 23867

syslinux/bootiso.S: merge isolinux boot sector
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sat Jun 20 14:15:09 2020 +0000 (2020-06-20)
parents c04335df099f
children 26195667e7c9
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@19515 39 #ifdef __ROCKRIDGE
pascal@19515 40 char *endname;
pascal@19515 41 #endif
pascal@19571 42 struct isostate *x=&isostate;
pascal@19515 43
pascal@20747 44 if (x->curdirsize == 0xFFFF) {
pascal@19826 45 x->curdirsize = x->dirsize;
pascal@20747 46 cpydirofs(x->curdirofs, x->dirofs);
pascal@19826 47 goto restarted;
pascal@19515 48 }
pascal@20534 49 if (x->curpos >= SECTORSZ || * (short *) (x->buffer + x->curpos) == 0) {
pascal@20538 50 restarted:
pascal@19826 51 if (x->curdirsize < DIRSECTORSZ) return -1;
pascal@20534 52 isoreadsector(&x->curdirofs);
pascal@20453 53 //x->curdirofs += SECTORSZ;
pascal@20453 54 *(int *)((char *) &x->curdirofs+1) += SECTORSZ/256;
pascal@19826 55 x->curdirsize -= DIRSECTORSZ;
pascal@20458 56 x->curpos = 0;
pascal@19515 57 }
pascal@20534 58 p = x->buffer; p += x->curpos;
pascal@21735 59 if ((x->entrysize = * (short *) p) == 0) {
pascal@19515 60 return -1;
pascal@20538 61 }
pascal@19636 62 x->fileofs = (* (unsigned long *) (p + 2)) << SECTORBITS;
pascal@19636 63 x->filesize = * (unsigned long *) (p + 10);
pascal@20543 64 x->filemod = 0x81ED; if (p[25] & 2) ((char *)&(x->filemod))[1] = 0x41;
pascal@20543 65 //x->filemod = (p[25] & 2) ? 0040755 : 0100755;
pascal@20453 66 //x->filemod = 0100755 - ((p[25] & (char)2) << 13);
pascal@19515 67 #ifdef __ROCKRIDGE
pascal@19515 68 endname = NULL;
pascal@19636 69 // p += 34 + (p[32] & -2); ?
pascal@20534 70 p = x->buffer + 34 + ((p[32] + x->curpos) & -2);
pascal@19515 71 do {
pascal@19636 72 int len = p[2];
pascal@20751 73 # if 0
pascal@19636 74 switch (* (short *) p) {
pascal@19515 75 case 0x5850: // PX
pascal@19636 76 x->filemod = * (short *) (p + 4);
pascal@19515 77 break;
pascal@20751 78 case 0x4D4E: // NM
pascal@20751 79 # else
pascal@20751 80 if (* (short *) p == 0x4D4E) {
pascal@20751 81 # endif
pascal@20751 82 x->filename = p + 5;
pascal@20751 83 endname = p + len;
pascal@19515 84 }
pascal@19636 85 p += len;
pascal@21735 86 } while (x->buffer + x->curpos + x->entrysize - 2 > p);
pascal@23867 87 #ifdef ISOHOOK
pascal@23867 88 *endname = 0;
pascal@23867 89 #else
pascal@19515 90 if (endname)
pascal@19515 91 *endname = 0;
pascal@19515 92 else
pascal@19515 93 #endif
pascal@23867 94 #endif
pascal@23867 95 #ifndef ISOHOOK
pascal@19515 96 {
pascal@20534 97 p = x->buffer + 33; x->filename = p += x->curpos;
pascal@19636 98 p--;
pascal@20453 99 if (((* (short *) p) & 0xFEFF) -1 == 0) {
pascal@20453 100 x->filename = "..";
pascal@22632 101 if (--(* (short *) p) == 0)
pascal@20453 102 x->filename++;
pascal@20453 103 }
pascal@20453 104 else {
pascal@19636 105 p += *p; p--;
pascal@19636 106 if (* (short *) (p) != 0x313B) {
pascal@19636 107 p++; p++; // no ;1 to remove
pascal@19636 108 }
pascal@19636 109 if (p[-1] == '.') p--;
pascal@19636 110 *p = 0;
pascal@19515 111 }
pascal@19515 112 }
pascal@23867 113 #endif
pascal@21735 114 x->curpos += x->entrysize;
pascal@19515 115 return 0;
pascal@19515 116 }
pascal@19515 117
pascal@19825 118 //#define IS_DIR(x)( ((x) & ~0777) == 040000)
pascal@20454 119 //#define IS_DIR(x)( (char)((x) >> 9) == (char)040)
pascal@20454 120 //#define IS_DIR(x)( (*((char*) &x + 1) & (char)0776) == (char)0100)
pascal@20454 121 #define IS_DIR(x)( (*((char*) &x + 1) & (char)0676) == (char)0)
pascal@21628 122 int _isoopen(void)
pascal@19515 123 {
pascal@21735 124 // char *name, *s, c;
pascal@21735 125 // char _64bits = cpuhaslm();
pascal@19571 126 struct isostate *x=&isostate;
pascal@21735 127 #define name (x->filename2open)
pascal@21754 128 #define c (x->c)
pascal@21754 129 #define _64bits (x->_64bits)
pascal@21735 130 char *s;
pascal@19515 131
pascal@23806 132 #ifdef ISOHOOK
pascal@23806 133 extern int _cpuhaslm();
pascal@23806 134 _64bits = _cpuhaslm();
pascal@23806 135 #else
pascal@21735 136 _64bits = cpuhaslm();
pascal@23806 137 #endif
pascal@20528 138 do {
pascal@23863 139 #ifdef ISOHOOK
pascal@23863 140 s = (char *) x->filename2open;
pascal@23863 141 if (*s == '/') {
pascal@23863 142 s++;
pascal@23863 143 isoroot();
pascal@23863 144 }
pascal@23863 145 name = s;
pascal@23863 146 while (*++s);
pascal@23863 147 #else
pascal@21628 148 for (s = (char *) x->filename2open; *s == '/' ; s++) {
pascal@21628 149 isoroot();
pascal@19515 150 }
pascal@19825 151 next:
pascal@20751 152 name = s;
pascal@21754 153 do s++; while (*s && *s != '/');
pascal@21750 154 c = *s; *s = 0;
pascal@23863 155 #endif
pascal@21576 156 for (x->curdirsize = 0xFFFF; isoreaddir() != -1;) {
pascal@21735 157 const char *n = name;
pascal@21735 158 #define i (x->tmp)
pascal@21735 159 i = x->filename;
pascal@19825 160 if (_64bits) {
pascal@21628 161 if (strhead(i, n) == -1) continue;
pascal@19825 162 n = "64";
pascal@19825 163 i += s - name; // strlen(name);
pascal@19515 164 }
pascal@19825 165 if (strcmp(i, n)) continue;
pascal@23863 166 #ifndef ISOHOOK
pascal@19825 167 *s++ = c;
pascal@23863 168 #endif
pascal@19825 169 if (IS_DIR(x->filemod)) {
pascal@20747 170 cpydirofs(x->dirofs, x->fileofs);
pascal@19826 171 x->dirsize = filesize2dirsize(x->filesize);
pascal@23863 172 #ifndef ISOHOOK
pascal@19825 173 if (c) goto next;
pascal@23863 174 #endif
pascal@19515 175 }
pascal@19825 176 isolseek(&x->fileofs);
pascal@19825 177 return 0;
pascal@19515 178 }
pascal@20528 179 } while ((_64bits ^= CPUMASKLM) == 0);
pascal@19825 180 return -1;
pascal@19515 181 }