Import sources from 2011-03-30 iso image

1 files changed, 52 insertions, 0 deletions

diff --git a/sys/src/libdraw/subfontname.c b/sys/src/libdraw/subfontname.c
new file mode 100755
index 000000000..8ab79408c
--- /dev/null
+++ b/sys/src/libdraw/subfontname.c
@@ -0,0 +1,52 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+
+/*
+ * Default version: convert to file name
+ */
+
+char*
+subfontname(char *cfname, char *fname, int maxdepth)
+{
+	char *t, *u, *tmp1, *tmp2;
+	int i;
+
+	t = strdup(cfname);  /* t is the return string */
+	if(strcmp(cfname, "*default*") == 0)
+		return t;
+	if(t[0] != '/'){
+		tmp2 = strdup(fname);
+		u = utfrrune(tmp2, '/');
+		if(u)
+			u[0] = 0;
+		else
+			strcpy(tmp2, ".");
+		tmp1 = smprint("%s/%s", tmp2, t);
+		free(tmp2);
+		free(t);
+		t = tmp1;
+	}
+
+	if(maxdepth > 8)
+		maxdepth = 8;
+
+	for(i=3; i>=0; i--){
+		if((1<<i) > maxdepth)
+			continue;
+		/* try i-bit grey */
+		tmp2 = smprint("%s.%d", t, i);
+		if(access(tmp2, AREAD) == 0) {
+			free(t);
+			return tmp2;
+		}
+		free(tmp2);
+	}
+
+	/* try default */
+	if(access(t, AREAD) == 0)
+		return t;
+
+	free(t);
+	return nil;
+}