mirror of
https://github.com/depp/syncfiles.git
synced 2024-11-28 12:51:05 +00:00
910039b77a
The previous implementation read the entire file into memory and then processed it. This version uses reasonably-sized buffers and can handle files of any size. Since this new conversion code is a bit more complicated, a test suite has been added which can be run on ordinary Unix systems. GitOrigin-RevId: acc7be277103fad1da2d0ca16d1a84be11802fbf
109 lines
3.4 KiB
C
109 lines
3.4 KiB
C
#include "convert.h"
|
|
|
|
// Table that converts Macintosh Roman characters to UTF-8, and CR to LF.
|
|
static const unsigned short kToUnixTable[256] = {
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
|
|
12, 10, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
|
|
24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
|
|
36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
|
|
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
|
|
60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71,
|
|
72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,
|
|
84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
|
|
96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107,
|
|
108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
|
|
120, 121, 122, 123, 124, 125, 126, 127, 196, 197, 199, 201,
|
|
209, 214, 220, 225, 224, 226, 228, 227, 229, 231, 233, 232,
|
|
234, 235, 237, 236, 238, 239, 241, 243, 242, 244, 246, 245,
|
|
250, 249, 251, 252, 8224, 176, 162, 163, 167, 8226, 182, 223,
|
|
174, 169, 8482, 180, 168, 8800, 198, 216, 8734, 177, 8804, 8805,
|
|
165, 181, 8706, 8721, 8719, 960, 8747, 170, 186, 937, 230, 248,
|
|
191, 161, 172, 8730, 402, 8776, 8710, 171, 187, 8230, 160, 192,
|
|
195, 213, 338, 339, 8211, 8212, 8220, 8221, 8216, 8217, 247, 9674,
|
|
255, 376, 8260, 8364, 8249, 8250, 64257, 64258, 8225, 183, 8218, 8222,
|
|
8240, 194, 202, 193, 203, 200, 205, 206, 207, 204, 211, 212,
|
|
63743, 210, 218, 219, 217, 305, 710, 732, 175, 728, 729, 730,
|
|
184, 733, 731, 711,
|
|
};
|
|
|
|
int mac_to_unix(short srcRef, short destRef, void *srcBuf, void *destBuf) {
|
|
unsigned char *op, *oe, *tmp; // Output ptr, end.
|
|
const unsigned char *ip, *ie; // Input ptr, end.
|
|
unsigned cp; // Code point.
|
|
int r;
|
|
long count;
|
|
int has_eof = 0;
|
|
|
|
// Initialize buffer pointers.
|
|
ip = srcBuf;
|
|
ie = ip;
|
|
op = destBuf;
|
|
oe = op + kBufferBaseSize;
|
|
|
|
for (;;) {
|
|
// If input buffer is consumed, read more.
|
|
if (ip >= ie) {
|
|
if (has_eof) {
|
|
break;
|
|
}
|
|
count = kBufferBaseSize;
|
|
r = convert_read(srcRef, &count, srcBuf);
|
|
if (r != kConvertOK) {
|
|
if (r == kConvertEOF) {
|
|
has_eof = 1;
|
|
if (count == 0) {
|
|
break;
|
|
}
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
ip = srcBuf;
|
|
ie = ip + count;
|
|
}
|
|
|
|
// If output buffer has a full chunk, write it out.
|
|
if (op >= oe) {
|
|
count = kBufferBaseSize;
|
|
r = convert_write(destRef, count, destBuf);
|
|
if (r != 0) {
|
|
return 1;
|
|
}
|
|
tmp = destBuf;
|
|
tmp[0] = tmp[kBufferBaseSize];
|
|
tmp[1] = tmp[kBufferBaseSize + 1];
|
|
op -= kBufferBaseSize;
|
|
}
|
|
|
|
// Convert as much as possible. Note that the "extra" past the end of
|
|
// the destination buffer may be used, just to simplify bounds checking.
|
|
while (ip < ie && op < oe) {
|
|
cp = kToUnixTable[*ip++];
|
|
if (cp < 0x80) {
|
|
op[0] = cp;
|
|
op += 1;
|
|
} else if (cp < 0x400) {
|
|
op[0] = (cp >> 6) | 0xc0;
|
|
op[1] = (cp & 0x3f) | 0x80;
|
|
op += 2;
|
|
} else {
|
|
op[0] = (cp >> 12) | 0xe0;
|
|
op[1] = ((cp >> 6) & 0x3f) | 0x80;
|
|
op[2] = (cp & 0x3f) | 0x80;
|
|
op += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Write remainder of output buffer.
|
|
if (op != destBuf) {
|
|
count = op - (unsigned char *)destBuf;
|
|
r = convert_write(destRef, count, destBuf);
|
|
if (r != 0) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|