ref: 2450db511ea8911e52168e3a5f895a89e963dc57
parent: 42506c4e867c90c174617163fcfc2c08f0246a49
author: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>
date: Tue Aug 23 18:37:18 EDT 2022
add shortcuts.c for brightness/volume control on MNT Reform 2
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@
* `msr.c` MSR reading tool
* `nanosec.c` nanosec(), a replacement for (way more expensive) nsec()
* `qt.[ch]` [QP tries](https://dotat.at/prog/qp/README.html)
+* `shortcuts.c` Brightness and volume control using keyboard shortcuts on MNT Reform 2
* `xml.[ch]` XML parser, works as a streaming parser as well
* `clear` removes all program output from the terminal, leaving only commands used
--- /dev/null
+++ b/shortcuts.c
@@ -1,0 +1,111 @@
+/*
+ * install: 7c -FTVw shortcuts.c && 7o -o /arm64/bin/reform/shortcuts shortcuts.7
+ * in rio: reform/shortcuts </dev/kbdtap >/dev/kbdtap
+ * Kmod4+F1/F2 - brightness
+ * Kmod4+F3/F4 - volume
+ */
+#include <u.h>
+#include <libc.h>
+#include <keyboard.h>
+
+static int lightstep = 5, volstep = 3;
+static int light, vol, mod;
+
+static void
+process(char *s)
+{+ char b[128], *p;
+ int n, o;
+ Rune r;
+
+ if(*s == 'K' && s[1] == 0)
+ mod = 0;
+
+ o = 0;
+ b[o++] = *s;
+ for(p = s+1; *p != 0; p += n){+ if((n = chartorune(&r, p)) == 1 && r == Runeerror){+ /* bail out */
+ n = strlen(p);
+ memmove(b+o, p, n);
+ o += n;
+ p += n;
+ break;
+ }
+
+ if(*s == 'k' && r == Kmod4){+ mod = 1;
+ }else if(*s == 'K'){+ if(mod && r >= (KF|1) && r <= (KF|4))
+ continue;
+ if(r == Kmod4)
+ mod = 0;
+ }else if(mod && r >= (KF|1) && r <= (KF|4)){+ if(*s == 'c'){+ if(r == (KF|1))
+ fprint(light, "lcd -%d", lightstep);
+ else if(r == (KF|2))
+ fprint(light, "lcd +%d", lightstep);
+ else if(r == (KF|3))
+ fprint(vol, "master -%d", volstep);
+ else if(r == (KF|4))
+ fprint(vol, "master +%d", volstep);
+ }
+ continue;
+ }
+
+ memmove(b+o, p, n);
+ o += n;
+ }
+
+ /* all runes filtered out - ignore completely */
+ if(o == 1 && p-s > 1)
+ return;
+
+ b[o++] = 0;
+ if(write(1, b, o) != o)
+ exits(nil);
+}
+
+static void
+usage(void)
+{+ fprint(2, "usage: [-l light_step] [-v vol_step] %s\n", argv0);
+ exits("usage");+}
+
+void
+main(int argc, char **argv)
+{+ char b[128];
+ int i, j, n;
+
+ ARGBEGIN{+ case 'l':
+ lightstep = atoi(EARGF(usage()));
+ break;
+ case 'v':
+ volstep = atoi(EARGF(usage()));
+ break;
+ default:
+ usage();
+ }ARGEND
+
+ light = open("/dev/light", OWRITE);+ vol = open("/dev/volume", OWRITE);+ for(i = 0;;){+ if((n = read(0, b+i, sizeof(b)-i)) <= 0)
+ break;
+ n += i;
+ for(j = 0; j < n; j++){+ if(b[j] == 0){+ process(b+i);
+ i = j+1;
+ }
+ }
+ memmove(b, b+i, j-i);
+ i -= j;
+ }
+
+ exits(nil);
+}