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/* $Id$ */
#include <stdio.h>
#include <erl_driver.h>
#include <ei.h>
#include <iconv.h>
#include "uni_data.c"
#include "uni_norm.c"
#define NAMEPREP_COMMAND 1
#define NODEPREP_COMMAND 2
#define RESOURCEPREP_COMMAND 3
typedef struct {
ErlDrvPort port;
} stringprep_data;
static ErlDrvData stringprep_erl_start(ErlDrvPort port, char *buff)
{
stringprep_data* d = (stringprep_data*)driver_alloc(sizeof(stringprep_data));
d->port = port;
//set_port_control_flags(port, PORT_CONTROL_FLAG_BINARY);
return (ErlDrvData)d;
}
static void stringprep_erl_stop(ErlDrvData handle)
{
driver_free((char*)handle);
}
static int combine(int ch1, int ch2)
{
int info1, info2;
info1 = GetUniCharCompInfo(ch1);
if(info1 != -1) {
if(info1 & CompSingleMask) {
if (ch2 == compFirstList[info1 & CompMask][0]) {
return compFirstList[info1 & CompMask][1];
} else
return 0;
}
} else
return 0;
info2 = GetUniCharCompInfo(ch2);
if(info2 != -1) {
if (info2 & CompSingleMask) {
if (ch1 == compSecondList[info2 & CompMask][0]) {
return compSecondList[info2 & CompMask][1];
} else
return 0;
}
} else
return 0;
return compBothList[info1][info2];
}
#define ADD_UCHAR(ruc) \
if(ruc < 0x80) { \
if(pos >= size) { \
size = 2*size + 1; \
rstring = driver_realloc(rstring, size); \
} \
rstring[pos] = (char) ruc; \
pos++; \
} else if(ruc < 0x7FF) { \
if(pos + 1 >= size) { \
size = 2*size + 2; \
rstring = driver_realloc(rstring, size); \
} \
rstring[pos] = (char) ((ruc >> 6) | 0xC0); \
rstring[pos+1] = (char) ((ruc | 0x80) & 0xBF); \
pos += 2; \
} else if(ruc < 0xFFFF) { \
if(pos + 2 >= size) { \
size = 2*size + 3; \
rstring = driver_realloc(rstring, size); \
} \
rstring[pos] = (char) ((ruc >> 12) | 0xE0); \
rstring[pos+1] = (char) (((ruc >> 6) | 0x80) & 0xBF); \
rstring[pos+2] = (char) ((ruc | 0x80) & 0xBF); \
pos += 3; \
}
static int stringprep_erl_control(ErlDrvData drv_data,
unsigned int command,
char *buf, int len,
char **rbuf, int rlen)
{
int i, j, pos=1;
unsigned char c;
int bad = 0;
int uc, ruc;
int size;
int info;
int prohibit, tolower;
char *rstring;
int *mc;
size = len + 1;
rstring = driver_alloc(size);
rstring[0] = 0;
switch (command)
{
case 0:
prohibit = ACMask;
tolower = 1;
break;
case NAMEPREP_COMMAND:
prohibit = ACMask;
tolower = 1;
break;
case NODEPREP_COMMAND:
prohibit = ACMask | C11Mask | C21Mask | XNPMask;
tolower = 1;
break;
case RESOURCEPREP_COMMAND:
prohibit = ACMask | C21Mask;
tolower = 0;
break;
}
for(i=0; i < len; i++)
{
c = buf[i];
if(c < 0x80) {
uc = c;
} else if(c < 0xC0) {
bad = 1;
} else if(c < 0xE0) {
if(i+1 < len && (buf[i+1] & 0xC0) == 0x80) {
uc = ((c & 0x1F) << 6) | (buf[i+1] & 0x3F);
i++;
} else {
bad = 1;
}
} else if(c < 0xF0) {
if(i+2 < len && (buf[i+1] & 0xC0) == 0x80 &&
(buf[i+2] & 0xC0) == 0x80) {
uc = ((c & 0x1F) << 12) | ((buf[i+1] & 0x1F) << 6)
| (buf[i+2] & 0x3F);
i += 2;
} else {
bad = 1;
}
} else {
// TODO
bad = 1;
}
if(bad) {
*rbuf = rstring;
return 1;
}
info = GetUniCharInfo(uc);
if(info & prohibit) {
*rbuf = rstring;
return 1;
}
if(!(info & B1Mask))
{
if(tolower) {
if(!(info & MCMask))
{
ruc = uc + GetDelta(info);
//info = GetUniCharDecompInfo(ruc);
//if(info >= 0) {
// printf("Decomposition %x: ", ruc);
// for(j = 0; j < GetDecompLen(info); j++) {
// printf("%x ", decompList[GetDecompShift(info) + j]);
// }
// printf("\r\n");
//}
ADD_UCHAR(ruc);
} else {
mc = GetMC(info);
for(j = 1; j <= mc[0]; j++) {
ruc = mc[j];
//printf("Char %x cclass %d\r\n", ruc, GetUniCharCClass(ruc));
ADD_UCHAR(ruc);
}
}
} else {
ruc = uc;
ADD_UCHAR(ruc);
}
}
}
//printf("Combine: %x\r\n", combine(0x438, 0x301));
rstring[0] = 1;
*rbuf = rstring;
return pos;
}
ErlDrvEntry stringprep_driver_entry = {
NULL, /* F_PTR init, N/A */
stringprep_erl_start, /* L_PTR start, called when port is opened */
stringprep_erl_stop, /* F_PTR stop, called when port is closed */
NULL, /* F_PTR output, called when erlang has sent */
NULL, /* F_PTR ready_input, called when input descriptor ready */
NULL, /* F_PTR ready_output, called when output descriptor ready */
"stringprep_drv", /* char *driver_name, the argument to open_port */
NULL, /* F_PTR finish, called when unloaded */
NULL, /* handle */
stringprep_erl_control, /* F_PTR control, port_command callback */
NULL, /* F_PTR timeout, reserved */
NULL /* F_PTR outputv, reserved */
};
#ifdef WIN32
__declspec(dllexport)
#endif
DRIVER_INIT(stringprep_erl) /* must match name in driver_entry */
{
return &stringprep_driver_entry;
}
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