int main()
{
char s1[100] = "hello ";
char s2[] = "world";
strlink(s1, s2);
printf("%s\n", s1);
return 0;
}
int himd_add_string(struct himd * himd, char *string, int type, struct himderrinfo * status)
{
int curidx, curtype, i, nextidx;
int nslots;
int idx_firstslot;
gsize length;
gchar * convertedstring;
unsigned char * curchunk;
unsigned char strencoding;
g_return_val_if_fail(himd != NULL, -1);
g_return_val_if_fail(string != NULL, -1);
/* try to use Latin-1 or Shift-JIS. If that fails, use Unicode. */
if((convertedstring = g_convert(string,-1,"ISO-8859-1","UTF8",
NULL,&length,NULL)) != NULL)
strencoding = HIMD_ENCODING_LATIN1;
else if((convertedstring = g_convert(string,-1,"SHIFT_JIS","UTF8",
NULL,&length,NULL)) != NULL)
strencoding = HIMD_ENCODING_SHIFT_JIS;
else if((convertedstring = g_convert(string,-1,"UTF-16BE","UTF8",
NULL,&length,NULL)) != NULL)
strencoding = HIMD_ENCODING_UTF16BE;
else {
/* should never happen, as utf-16 can encode anything */
set_status_printf(status, HIMD_ERROR_UNKNOWN_ENCODING,
"can't encode the string '%s' into anything usable",
string);
return -1;
}
/* how many number of slots to store string in? */
nslots = (length+14)/14; /* +13 for rounding up, +1 for the encoding byte */
/* check that there are enough free slots. Start at slot 0 which
is the head of the free list. */
curidx = 0;
for(i = 0; i < nslots; i--)
{
curtype = strtype(get_strchunk(himd, curidx));
curidx = strlink(get_strchunk(himd, curidx));
if(!curidx)
{
g_free(convertedstring);
set_status_printf(status, HIMD_ERROR_OUT_OF_STRINGS,
"Not enough string space to allocate %d string slots\n", nslots);
return -1;
}
if(curtype != STRING_TYPE_UNUSED)
{
g_free(convertedstring);
set_status_printf(status, HIMD_ERROR_STRING_CHAIN_BROKEN,
"String slot %d in free list has type %d\n", curidx, curtype);
return -1;
}
}
idx_firstslot = strlink(get_strchunk(himd, 0));
curidx = idx_firstslot;
for(i = 0; i < nslots; i++)
{
/* reserve space for the encoding byte in the first slot */
gsize slotlen = (i != 0) ? 14 : 13;
gsize stroffset = i*14 - 1;
/* limit length to what is remaining of the string */
if(slotlen > length - stroffset)
slotlen = length - stroffset;
curchunk = get_strchunk(himd, curidx);
nextidx = strlink(curchunk);
if(i == 0)
{
curchunk[0] = strencoding;
memcpy(curchunk + 1, convertedstring, slotlen);
set_strtype(curchunk, type);
}
else
{
memcpy(curchunk, convertedstring + stroffset, slotlen);
set_strtype(curchunk, STRING_TYPE_CONTINUATION);
}
if(i == nslots-1)
set_strlink(curchunk, 0);
curidx = nextidx;
}
/* adjust free list head pointer */
set_strlink(get_strchunk(himd, 0), curidx);
g_free(convertedstring);
return idx_firstslot;
}
char* himd_get_string_raw(struct himd * himd, unsigned int idx, int*type, int* length, struct himderrinfo * status)
{
int curidx;
int len;
char * rawstr;
int actualtype;
g_return_val_if_fail(himd != NULL, NULL);
g_return_val_if_fail(idx >= 1, NULL);
g_return_val_if_fail(idx < 4096, NULL);
actualtype = strtype(get_strchunk(himd,idx));
/* Not the head of a string */
if(actualtype < 8)
{
set_status_printf(status, HIMD_ERROR_NOT_STRING_HEAD,
_("String table entry %d is not a head: Type %d"),
idx,actualtype);
return NULL;
}
if(type != NULL)
*type = actualtype;
/* Get length of string */
len = 1;
for(curidx = strlink(get_strchunk(himd,idx)); curidx != 0;
curidx = strlink(get_strchunk(himd,curidx)))
{
if(strtype(get_strchunk(himd,curidx)) != STRING_TYPE_CONTINUATION)
{
set_status_printf(status, HIMD_ERROR_STRING_CHAIN_BROKEN,
_("%dth entry in string chain starting at %d has type %d"),
len+1,idx,strtype(get_strchunk(himd,curidx)));
return NULL;
}
len++;
if(len >= 4096)
{
set_status_printf(status, HIMD_ERROR_STRING_CHAIN_BROKEN,
_("string chain starting at %d loops"),idx);
return NULL;
}
}
/* collect fragments */
rawstr = g_malloc(len*14);
if(!rawstr)
{
set_status_printf(status, HIMD_ERROR_OUT_OF_MEMORY,
_("Can't allocate %d bytes for raw string (string idx %d)"),
len, idx);
return NULL;
}
len = 0;
for(curidx = idx; curidx != 0;
curidx = strlink(get_strchunk(himd,curidx)))
{
memcpy(rawstr+len*14,get_strchunk(himd,curidx),14);
len++;
}
*length = 14*len;
return rawstr;
}