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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* os_mac_conv.c: Code specifically for Mac string conversions.
*
* This code has been put in a separate file to avoid the conflicts that are
* caused by including both the X11 and Carbon header files.
*/
#define NO_X11_INCLUDES
#include "vim.h"
extern char_u *mac_string_convert __ARGS((char_u *ptr, int len, int *lenp, int fail_on_error, int from, int to, int *unconvlenp));
extern int macroman2enc __ARGS((char_u *ptr, long *sizep, long real_size));
extern int enc2macroman __ARGS((char_u *from, size_t fromlen, char_u *to, int *tolenp, int maxtolen, char_u *rest, int *restlenp));
/*
* A Mac version of string_convert_ext() for special cases.
*/
char_u *
mac_string_convert(ptr, len, lenp, fail_on_error, from_enc, to_enc, unconvlenp)
char_u *ptr;
int len;
int *lenp;
int fail_on_error;
int from_enc;
int to_enc;
int *unconvlenp;
{
char_u *retval, *d;
CFStringRef cfstr;
int buflen, in, out, l, i;
CFStringEncoding from;
CFStringEncoding to;
switch (from_enc)
{
case 'l': from = kCFStringEncodingISOLatin1; break;
case 'm': from = kCFStringEncodingMacRoman; break;
case 'u': from = kCFStringEncodingUTF8; break;
default: return NULL;
}
switch (to_enc)
{
case 'l': to = kCFStringEncodingISOLatin1; break;
case 'm': to = kCFStringEncodingMacRoman; break;
case 'u': to = kCFStringEncodingUTF8; break;
default: return NULL;
}
if (unconvlenp != NULL)
*unconvlenp = 0;
cfstr = CFStringCreateWithBytes(NULL, ptr, len, from, 0);
/* When conversion failed, try excluding bytes from the end, helps when
* there is an incomplete byte sequence. Only do up to 6 bytes to avoid
* looping a long time when there really is something unconvertable. */
while (cfstr == NULL && unconvlenp != NULL && len > 1 && *unconvlenp < 6)
{
--len;
++*unconvlenp;
cfstr = CFStringCreateWithBytes(NULL, ptr, len, from, 0);
}
if (cfstr == NULL)
return NULL;
if (to == kCFStringEncodingUTF8)
buflen = len * 6 + 1;
else
buflen = len + 1;
retval = alloc(buflen);
if (retval == NULL)
{
CFRelease(cfstr);
return NULL;
}
if (!CFStringGetCString(cfstr, retval, buflen, to))
{
CFRelease(cfstr);
if (fail_on_error)
{
vim_free(retval);
return NULL;
}
/* conversion failed for the whole string, but maybe it will work
* for each character */
for (d = retval, in = 0, out = 0; in < len && out < buflen - 1;)
{
if (from == kCFStringEncodingUTF8)
l = utf_ptr2len_check(ptr + in);
else
l = 1;
cfstr = CFStringCreateWithBytes(NULL, ptr + in, l, from, 0);
if (cfstr == NULL)
{
*d++ = '?';
out++;
}
else
{
if (!CFStringGetCString(cfstr, d, buflen - out, to))
{
*d++ = '?';
out++;
}
else
{
i = strlen(d);
d += i;
out += i;
}
CFRelease(cfstr);
}
in += l;
}
*d = NUL;
if (lenp != NULL)
*lenp = out;
return retval;
}
CFRelease(cfstr);
if (lenp != NULL)
*lenp = strlen(retval);
return retval;
}
/*
* Conversion from Apple MacRoman char encoding to UTF-8 or latin1, using
* standard Carbon framework.
* Input: "ptr[*sizep]".
* "real_size" is the size of the buffer that "ptr" points to.
* output is in-place, "sizep" is adjusted.
* Returns OK or FAIL.
*/
int
macroman2enc(ptr, sizep, real_size)
char_u *ptr;
long *sizep;
long real_size;
{
CFStringRef cfstr;
CFRange r;
CFIndex len = *sizep;
/* MacRoman is an 8-bit encoding, no need to move bytes to
* conv_rest[]. */
cfstr = CFStringCreateWithBytes(NULL, ptr, len,
kCFStringEncodingMacRoman, 0);
/*
* If there is a conversion error, try using another
* conversion.
*/
if (cfstr == NULL)
return FAIL;
r.location = 0;
r.length = CFStringGetLength(cfstr);
if (r.length != CFStringGetBytes(cfstr, r,
(enc_utf8) ? kCFStringEncodingUTF8 : kCFStringEncodingISOLatin1,
0, /* no lossy conversion */
0, /* not external representation */
ptr + *sizep, real_size - *sizep, &len))
{
CFRelease(cfstr);
return FAIL;
}
CFRelease(cfstr);
mch_memmove(ptr, ptr + *sizep, len);
*sizep = len;
return OK;
}
/*
* Conversion from UTF-8 or latin1 to MacRoman.
* Input: "from[fromlen]"
* Output: "to[maxtolen]" length in "*tolenp"
* Unconverted rest in rest[*restlenp].
* Returns OK or FAIL.
*/
int
enc2macroman(from, fromlen, to, tolenp, maxtolen, rest, restlenp)
char_u *from;
size_t fromlen;
char_u *to;
int *tolenp;
int maxtolen;
char_u *rest;
int *restlenp;
{
CFStringRef cfstr;
CFRange r;
CFIndex l;
*restlenp = 0;
cfstr = CFStringCreateWithBytes(NULL, from, fromlen,
(enc_utf8) ? kCFStringEncodingUTF8 : kCFStringEncodingISOLatin1,
0);
while (cfstr == NULL && *restlenp < 3 && fromlen > 1)
{
rest[*restlenp++] = from[--fromlen];
cfstr = CFStringCreateWithBytes(NULL, from, fromlen,
(enc_utf8) ? kCFStringEncodingUTF8 : kCFStringEncodingISOLatin1,
0);
}
if (cfstr == NULL)
return FAIL;
r.location = 0;
r.length = CFStringGetLength(cfstr);
if (r.length != CFStringGetBytes(cfstr, r,
kCFStringEncodingMacRoman,
0, /* no lossy conversion */
0, /* not external representation (since vim
* handles this internally */
to, maxtolen, &l))
{
CFRelease(cfstr);
return FAIL;
}
CFRelease(cfstr);
*tolenp = l;
return OK;
}
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