FreeCalypso > hg > freecalypso-sw

annotate target-utils/c139explore/mygetchar.c @ 1027:1178befeda76

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fc-shell: tch command framework started
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 30 May 2016 23:19:30 +0000
parents 845c2e420069
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
946
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
1 /*
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
2 * The interactive command entry (editing) function in libcommon
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
3 * will call mygetchar() for its character input. It is supposed
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
4 * to be a blocking wait for input, but in some programs other
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
5 * processing can be done while waiting - for example, check for
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
6 * keypad presses as well. This is the basic version which waits
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
7 * for serial input and nothing else.
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
8 */
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
9
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
10 extern int serial_in_poll();
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
11
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
12 int
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
13 mygetchar()
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
14 {
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
15 register int c;
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
16
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
17 do
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
18 c = serial_in_poll();
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
19 while (c < 0);
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
20 return c;
845c2e420069 target-utils/c139explore utility started
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff changeset
21 }