mirror of
https://github.com/ksherlock/dot_clean.git
synced 2024-06-01 15:41:29 +00:00
421 lines
9.5 KiB
C++
421 lines
9.5 KiB
C++
#include "finder_info_helper.h"
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#include <stdint.h>
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#include <string.h>
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#include <ctype.h>
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#include <string>
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#include <unistd.h>
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#include <fcntl.h>
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#include "xattr.h"
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#if defined(__APPLE__)
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#include <sys/xattr.h>
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#endif
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#if defined(__linux__)
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#define XATTR_FINDERINFO_NAME "user.com.apple.FinderInfo"
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#define XATTR_RESOURCEFORK_NAME "user.com.apple.ResourceFork"
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#endif
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#if defined (_WIN32)
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#define XATTR_FINDERINFO_NAME "AFP_AfpInfo"
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#endif
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#ifndef XATTR_FINDERINFO_NAME
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#define XATTR_FINDERINFO_NAME "com.apple.FinderInfo"
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#endif
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#if defined(_WIN32)
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#define _prodos_file_type _afp.prodos_file_type
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#define _prodos_aux_type _afp.prodos_aux_type
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#define _finder_info _afp.finder_info
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#endif
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namespace {
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/*
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tech note PT515
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ProDOS -> Macintosh conversion
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ProDOS Macintosh
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Filetype Auxtype Creator Filetype
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$00 $0000 'pdos' 'BINA'
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$B0 (SRC) (any) 'pdos' 'TEXT'
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$04 (TXT) $0000 'pdos' 'TEXT'
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$FF (SYS) (any) 'pdos' 'PSYS'
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$B3 (S16) (any) 'pdos' 'PS16'
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$uv $wxyz 'pdos' 'p' $uv $wx $yz
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Programmer's Reference for System 6.0:
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ProDOS Macintosh
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File Type Auxiliary Type Creator Type File Type
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$00 $0000 'pdos' 'BINA'
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$04 (TXT) $0000 'pdos' 'TEXT'
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$FF (SYS) (any) 'pdos' 'PSYS'
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$B3 (S16) $DByz 'pdos' 'p' $B3 $DB $yz
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$B3 (S16) (any) 'pdos' 'PS16'
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$D7 $0000 'pdos' 'MIDI'
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$D8 $0000 'pdos' 'AIFF'
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$D8 $0001 'pdos' 'AIFC'
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$E0 $0005 'dCpy' 'dImg'
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$FF (SYS) (any) 'pdos' 'PSYS'
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$uv $wxyz 'pdos' 'p' $uv $wx $yz
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mpw standard:
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$uv (any) "pdos" printf("%02x ",$uv)
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*/
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int hex(uint8_t c)
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{
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if (c >= '0' && c <= '9') return c - '0';
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if (c >= 'a' && c <= 'f') return c + 10 - 'a';
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if (c >= 'A' && c <= 'F') return c + 10 - 'A';
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return 0;
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}
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bool finder_info_to_filetype(const uint8_t *buffer, uint16_t *file_type, uint32_t *aux_type) {
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if (!memcmp("pdos", buffer + 4, 4))
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{
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if (buffer[0] == 'p') {
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*file_type = buffer[1];
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*aux_type = (buffer[2] << 8) | buffer[3];
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return true;
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}
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if (!memcmp("PSYS", buffer, 4)) {
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*file_type = 0xff;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("PS16", buffer, 4)) {
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*file_type = 0xb3;
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*aux_type = 0x0000;
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return true;
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}
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// old mpw method for encoding.
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if (!isxdigit(buffer[0]) && isxdigit(buffer[1]) && buffer[2] == ' ' && buffer[3] == ' ')
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{
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*file_type = (hex(buffer[0]) << 8) | hex(buffer[1]);
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*aux_type = 0;
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return true;
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}
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}
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if (!memcmp("TEXT", buffer, 4)) {
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*file_type = 0x04;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("BINA", buffer, 4)) {
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*file_type = 0x00;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("dImgdCpy", buffer, 8)) {
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*file_type = 0xe0;
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*aux_type = 0x0005;
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return true;
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}
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if (!memcmp("MIDI", buffer, 4)) {
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*file_type = 0xd7;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("AIFF", buffer, 4)) {
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*file_type = 0xd8;
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*aux_type = 0x0000;
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return true;
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}
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if (!memcmp("AIFC", buffer, 4)) {
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*file_type = 0xd8;
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*aux_type = 0x0001;
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return true;
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}
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return false;
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}
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bool file_type_to_finder_info(uint8_t *buffer, uint16_t file_type, uint32_t aux_type) {
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if (file_type > 0xff || aux_type > 0xffff) return false;
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if (!file_type && aux_type == 0x0000) {
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memcpy(buffer, "BINApdos", 8);
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return true;
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}
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if (file_type == 0x04 && aux_type == 0x0000) {
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memcpy(buffer, "TEXTpdos", 8);
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return true;
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}
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if (file_type == 0xff && aux_type == 0x0000) {
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memcpy(buffer, "PSYSpdos", 8);
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return true;
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}
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if (file_type == 0xb3 && aux_type == 0x0000) {
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memcpy(buffer, "PS16pdos", 8);
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return true;
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}
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if (file_type == 0xd7 && aux_type == 0x0000) {
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memcpy(buffer, "MIDIpdos", 8);
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return true;
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}
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if (file_type == 0xd8 && aux_type == 0x0000) {
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memcpy(buffer, "AIFFpdos", 8);
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return true;
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}
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if (file_type == 0xd8 && aux_type == 0x0001) {
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memcpy(buffer, "AIFCpdos", 8);
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return true;
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}
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if (file_type == 0xe0 && aux_type == 0x0005) {
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memcpy(buffer, "dImgdCpy", 8);
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return true;
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}
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memcpy(buffer, "p pdos", 8);
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buffer[1] = (file_type) & 0xff;
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buffer[2] = (aux_type >> 8) & 0xff;
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buffer[3] = (aux_type) & 0xff;
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return true;
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}
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int fi_open(const std::string &path, bool read_only) {
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#if defined(__sun__)
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if (read_only) return attropen(path.c_str(), XATTR_FINDERINFO_NAME, O_RDONLY);
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else return attropen(path.c_str(), XATTR_FINDERINFO_NAME, O_RDWR | O_CREAT, 0666);
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#elif defined(_WIN32)
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std::string s(path);
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s.append(":" XATTR_FINDERINFO_NAME);
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if (read_only) return open(s.c_str(), O_RDONLY | O_BINARY);
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else return open(s.c_str(), O_RDWR | O_CREAT | O_BINARY, 0666);
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#else
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return open(path.c_str(), O_RDONLY);
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#endif
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}
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int fi_write(int fd, const void *data, int length) {
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#if defined(__sun__) || defined(_WIN32)
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lseek(fd, 0, SEEK_SET);
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return write(fd, data, length);
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#else
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return write_xattr(fd, XATTR_FINDERINFO_NAME, data, length);
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#endif
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}
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int fi_read(int fd, void *data, int length) {
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#if defined(__sun__) || defined(_WIN32)
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lseek(fd, 0, SEEK_SET);
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return read(fd, data, length);
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#else
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return read_xattr(fd, XATTR_FINDERINFO_NAME, data, length);
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#endif
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}
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#if defined(_WIN32)
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void afp_init(struct AFP_Info *info) {
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//static_assert(sizeof(AFP_Info) == 60, "Incorrect AFP_Info size");
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memset(info, 0, sizeof(*info));
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info->magic = 0x00504641;
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info->version = 0x00010000;
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info->backup_date = 0x80000000;
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}
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int afp_verify(struct AFP_Info *info) {
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if (!info) return 0;
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if (info->magic != 0x00504641) return 0;
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if (info->version != 0x00010000) return 0;
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return 1;
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}
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int afp_to_filetype(struct AFP_Info *info, uint16_t *file_type, uint32_t *aux_type) {
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// check for prodos ftype/auxtype...
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if (info->prodos_file_type || info->prodos_aux_type) {
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*file_type = info->prodos_file_type;
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*aux_type = info->prodos_aux_type;
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return 0;
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}
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int ok = finder_info_to_filetype(info->finder_info, file_type, aux_type);
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if (ok == 0) {
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info->prodos_file_type = *file_type;
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info->prodos_aux_type = *aux_type;
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}
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return 0;
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}
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enum {
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trust_prodos,
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trust_hfs
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};
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void afp_synchronize(struct AFP_Info *info, int trust) {
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// if ftype/auxtype is inconsistent between prodos and finder info, use
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// prodos as source of truth.
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uint16_t f;
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uint32_t a;
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if (finder_info_to_filetype(info->finder_info, &f, &a) != 0) return;
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if (f == info->prodos_file_type && a == info->prodos_aux_type) return;
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if (trust == trust_prodos)
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file_type_to_finder_info(info->finder_info, info->prodos_file_type, info->prodos_aux_type);
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else {
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info->prodos_file_type = f;
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info->prodos_aux_type = a;
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}
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}
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#endif
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}
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finder_info_helper::finder_info_helper() {
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#if defined(_WIN32)
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afp_init(&_afp);
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#else
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memset(&_finder_info, 0, sizeof(_finder_info));
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#endif
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}
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finder_info_helper::~finder_info_helper() {
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if (_fd >= 0) close(_fd);
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}
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bool finder_info_helper::open(const std::string &name, bool read_only) {
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if (_fd >= 0) {
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close(_fd);
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_fd = -1;
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}
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int fd = fi_open(name, read_only);
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if (fd < 0) return false;
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int ok = read(fd);
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// if write mode, it's ok if finder info doesn't exist (yet).
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if (!read_only && !ok) ok = true;
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if (read_only) close(fd);
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else _fd = fd;
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return ok;
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}
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bool finder_info_helper::read(int fd) {
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#if defined(_WIN32)
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int ok = fi_read(fd, &_afp, sizeof(_afp));
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if (ok < sizeof(_afp) || !afp_verify(&_afp)) {
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afp_init(&_afp);
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return false;
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}
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if (!_afp.prodos_file_type && !_afp.prodos_aux_type)
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afp_synchronize(&_afp, trust_hfs);
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#else
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int ok = fi_read(fd, &_finder_info, sizeof(_finder_info));
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if (ok < 0) {
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memset(&_finder_info, 0, sizeof(_finder_info));
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return false;
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}
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finder_info_to_filetype(_finder_info, &_prodos_file_type, &_prodos_aux_type);
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#endif
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return true;
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}
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bool finder_info_helper::write(int fd) {
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#if defined(_WIN32)
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return fi_write(fd, &_afp, sizeof(_afp));
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#else
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return fi_write(fd, &_finder_info, sizeof(_finder_info));
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#endif
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}
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bool finder_info_helper::write() {
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return write(_fd);
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}
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bool finder_info_helper::write(const std::string &name) {
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int fd = fi_open(name, false);
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if (fd < 0) return false;
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bool ok = write(fd);
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close(fd);
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return ok;
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}
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void finder_info_helper::set_prodos_file_type(uint16_t ftype, uint32_t atype) {
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_prodos_file_type = ftype;
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_prodos_aux_type = atype;
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file_type_to_finder_info(_finder_info, ftype, atype);
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}
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void finder_info_helper::set_prodos_file_type(uint16_t ftype) {
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set_prodos_file_type(ftype, _prodos_aux_type);
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}
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bool finder_info_helper::is_text() const {
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if (memcmp(_finder_info, "TEXT", 4) == 0) return true;
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if (_prodos_file_type == 0x04) return true;
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if (_prodos_file_type == 0xb0) return true;
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return false;
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}
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uint32_t finder_info_helper::file_type() const {
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uint32_t rv = 0;
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for (unsigned i = 0; i < 4; ++i) {
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rv <<= 8;
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rv |= _finder_info[i];
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}
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return rv;
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}
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uint32_t finder_info_helper::creator_type() const {
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uint32_t rv = 0;
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for (unsigned i = 4; i < 8; ++i) {
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rv <<= 8;
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rv |= _finder_info[i];
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}
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return rv;
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}
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void finder_info_helper::set_file_type(uint32_t x) {
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_finder_info[0] = x >> 24;
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_finder_info[1] = x >> 16;
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_finder_info[2] = x >> 8;
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_finder_info[3] = x >> 0;
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}
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void finder_info_helper::set_creator_type(uint32_t x) {
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_finder_info[4] = x >> 24;
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_finder_info[5] = x >> 16;
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_finder_info[6] = x >> 8;
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_finder_info[7] = x >> 0;
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}
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