read command from stdin

1 files changed, 37 insertions, 2 deletions

diff --git a/src/pnmcurvedit.cxx b/src/pnmcurvedit.cxx
index bb93099..52a473d 100644
--- a/src/pnmcurvedit.cxx
+++ b/src/pnmcurvedit.cxx
@@ -7,7 +7,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <math.h>
+#include <ctype.h>
 
 #include <FL/Fl.H>
 #include <FL/Fl_Double_Window.H>
@@ -15,11 +15,12 @@
 #include "CurveEditor.H"
 
 static CurveEditor *ce;
+static char cmd[2048];
 
 static void editor_cb(Fl_Widget* o, void* d) {
 	double x, y;
 
-	printf("pnmcurve -c ");
+	printf("%s ", cmd);
 	for (int i = 0; i<ce->get_n(); i++) {
 		if (i != 0)
 			printf(",");
@@ -30,6 +31,38 @@ static void editor_cb(Fl_Widget* o, void* d) {
 	fflush(stdout);
 }
 
+static void
+stdin_cb(int fd, void *d) {
+	char *curve = NULL;
+
+	fgets(cmd, sizeof(cmd), stdin);
+
+	for (int i = strlen(cmd) - 1; i >= 0; i--) {
+		if (isspace(cmd[i])) {
+			cmd[i] = '\0';
+			if (curve)
+				break;
+		} else {
+			curve = &cmd[i];
+		}
+	}
+
+	if (curve) {
+		double X, Y;
+		char *pstr;
+
+		ce->clear();
+		while (pstr = strsep(&curve, ",")) {
+			if (sscanf(pstr, "%lf:%lf", &X, &Y) != 2 ||
+				X < 0 || X > 1 || Y < 0 || Y > 1) {
+				fprintf(stderr, "Could not parse control point %s.\n", pstr);
+				continue;
+			}       
+			ce->add_point(X, Y);
+		} 
+	}
+}
+
 int
 main(int argc, char **argv) {
 	Fl_Double_Window window(800, 600, "pnmcurvedit");
@@ -42,5 +75,7 @@ main(int argc, char **argv) {
 	window.resizable(ce);
 	window.show();
 
+	Fl::add_fd(0, FL_READ, stdin_cb);
+
 	return Fl::run();
 }