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Split out the actual CSI parser into its own function, separate from peekkey_csi

This commit is contained in:
Paul LeoNerd Evans 2012-11-30 13:52:56 +00:00
parent 29298167d1
commit d241d6216a
1 changed files with 75 additions and 59 deletions
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134
driver-csi.c
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@ -204,6 +204,72 @@ static TermKeyResult handle_csi_position(TermKey *tk, TermKeyKey *key, int cmd,
return TERMKEY_RES_KEY;
}
#define CHARAT(i) (tk->buffer[tk->buffstart + (i)])
static TermKeyResult parse_csi(TermKey *tk, size_t introlen, size_t *csi_len, long args[], size_t *nargs, unsigned long *commandp)
{
size_t csi_end = introlen;
while(csi_end < tk->buffcount) {
if(CHARAT(csi_end) >= 0x40 && CHARAT(csi_end) < 0x80)
break;
csi_end++;
}
if(csi_end >= tk->buffcount)
return TERMKEY_RES_AGAIN;
unsigned char cmd = CHARAT(csi_end);
*commandp = cmd;
char present = 0;
int argi = 0;
size_t p = introlen;
// See if there is an initial byte
if(CHARAT(p) >= '<' && CHARAT(p) <= '?') {
*commandp |= (CHARAT(p) << 8);
p++;
}
// Now attempt to parse out up number;number;... separated values
while(p < csi_end) {
unsigned char c = CHARAT(p);
if(c >= '0' && c <= '9') {
if(!present) {
args[argi] = c - '0';
present = 1;
}
else {
args[argi] = (args[argi] * 10) + c - '0';
}
}
else if(c == ';') {
if(!present)
args[argi] = -1;
present = 0;
argi++;
if(argi > 16)
break;
}
p++;
}
if(!present)
args[argi] = -1;
argi++;
*nargs = argi;
*csi_len = csi_end + 1;
return TERMKEY_RES_KEY;
}
static int register_keys(void)
{
int i;
@ -313,19 +379,16 @@ static void free_driver(void *info)
free(csi);
}
#define CHARAT(i) (tk->buffer[tk->buffstart + (i)])
static TermKeyResult peekkey_csi(TermKey *tk, TermKeyCsi *csi, size_t introlen, TermKeyKey *key, int force, size_t *nbytep)
{
size_t csi_end = introlen;
size_t csi_len;
size_t args = 16;
long arg[16];
unsigned long cmd;
while(csi_end < tk->buffcount) {
if(CHARAT(csi_end) >= 0x40 && CHARAT(csi_end) < 0x80)
break;
csi_end++;
}
TermKeyResult ret = parse_csi(tk, introlen, &csi_len, arg, &args, &cmd);
if(csi_end >= tk->buffcount) {
if(ret == TERMKEY_RES_AGAIN) {
if(!force)
return TERMKEY_RES_AGAIN;
@ -335,54 +398,7 @@ static TermKeyResult peekkey_csi(TermKey *tk, TermKeyCsi *csi, size_t introlen,
return TERMKEY_RES_KEY;
}
unsigned char cmd = CHARAT(csi_end);
long arg[16];
char present = 0;
int args = 0;
int initial = 0;
size_t p = introlen;
// See if there is an initial byte
if(CHARAT(p) >= '<' && CHARAT(p) <= '?') {
initial = CHARAT(p);
p++;
}
// Now attempt to parse out up number;number;... separated values
while(p < csi_end) {
unsigned char c = CHARAT(p);
if(c >= '0' && c <= '9') {
if(!present) {
arg[args] = c - '0';
present = 1;
}
else {
arg[args] = (arg[args] * 10) + c - '0';
}
}
else if(c == ';') {
if(!present)
arg[args] = -1;
present = 0;
args++;
if(args > 16)
break;
}
p++;
}
if(!present)
arg[args] = -1;
args++;
if(cmd == 'M' && args < 3) { // Mouse in X10 encoding consumes the next 3 bytes also
size_t csi_len = csi_end + 1;
tk->buffstart += csi_len;
tk->buffcount -= csi_len;
@ -400,8 +416,8 @@ static TermKeyResult peekkey_csi(TermKey *tk, TermKeyCsi *csi, size_t introlen,
TermKeyResult result = TERMKEY_RES_NONE;
// We know from the logic above that cmd must be >= 0x40 and < 0x80
if(csi_handlers[cmd - 0x40])
result = (*csi_handlers[cmd - 0x40])(tk, key, (initial<<8)|cmd, arg, args);
if(csi_handlers[(cmd & 0xff) - 0x40])
result = (*csi_handlers[(cmd & 0xff) - 0x40])(tk, key, cmd, arg, args);
if(key->code.sym == TERMKEY_SYM_UNKNOWN) {
#ifdef DEBUG
@ -423,7 +439,7 @@ static TermKeyResult peekkey_csi(TermKey *tk, TermKeyCsi *csi, size_t introlen,
return TERMKEY_RES_NONE;
}
*nbytep = csi_end + 1;
*nbytep = csi_len;
return result;
}