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@ -364,22 +364,34 @@ err:
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// FIXME need unit tests on this
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// FIXME can read a character not intended for it
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// we'll get a trailing Device Attributes response, because we write
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// XTSMGRAPHICS followed by a DA query, in case the former isn't supported
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// (we'd otherwise hang looking for input).
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static int
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read_xtsmgraphics_reply(int fd, int* val2){
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char in;
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// return is of the form CSI ? Pi ; 0 ; Pv S
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// return is of the form CSI ? Pi ; Ps ; Pv S
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// Pi: 1 color registers, 2 sixel, 3 regis
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// Pa: 1 read, 2 reset, 3 set to Pv, 4 read maximum
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// Pv: n for color registers, width;height for geometry
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// Ps: 0 success, 1 bad Pi, 2 bad Pa, 3 failure
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enum {
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WANT_CSI,
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WANT_QMARK,
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WANT_PI,
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WANT_SEMI1,
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WANT_SEMI2,
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WANT_PV1,
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WANT_PV2,
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DONE
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DONE,
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} state = WANT_CSI;
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int pv = 0;
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int pi = 0;
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while(read(fd, &in, 1) == 1){
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//fprintf(stderr, "READ: %c 0x%02x\n", in, in);
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if(in == 'c'){ // should match the end of DA
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break;
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}
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switch(state){
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case WANT_CSI:
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if(in == NCKEY_ESC){
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@ -388,6 +400,16 @@ read_xtsmgraphics_reply(int fd, int* val2){
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break;
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case WANT_QMARK:
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if(in == '?'){
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state = WANT_PI;
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}
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break;
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case WANT_PI:
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if(!isdigit(in)){
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break;
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}
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pi *= 10;
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pi += in - '0';
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if(pi >= 1 && pi <= 3){
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state = WANT_SEMI1;
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}
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break;
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@ -424,11 +446,10 @@ read_xtsmgraphics_reply(int fd, int* val2){
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default:
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break;
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}
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if(state == DONE){
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if(pv >= 0 && (!val2 || *val2 >= 0)){
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return pv;
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}
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break;
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}
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if(state == DONE){
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if(pv >= 0 && (!val2 || *val2 >= 0)){
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return pv;
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}
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}
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return -1;
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