From 43e028136ef84c900f565946d5f694f9e4fc4eee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Haoran=20S=2E=20Diao=20=28=E5=88=81=E6=B5=A9=E7=84=B6=29?=
 <0@hairydiode.xyz>
Date: Sat, 6 Sep 2025 02:07:20 -0700
Subject: Fully functional so far. Just need to clean up the code and actually
 import the input method table

---
 im.h | 116 +++++++++++++++++++++++++++++++++++++++++--------------------------
 1 file changed, 72 insertions(+), 44 deletions(-)

(limited to 'im.h')

diff --git a/im.h b/im.h
index 4980938..e038f77 100644
--- a/im.h
+++ b/im.h
@@ -1,7 +1,17 @@
 #include "imtable.h"
 #define IM_BUFFER_LEN 32
-char im_buffer[IM_BUFFER_LEN];
+#define ENTER_KEY 0x0D
+#define BACKSPACE_KEY 0x7F
+//#define BACKSPACE_KEY '+'
+//setting it to the actual escape character interferes with arrow keys and
+//whatnot
+//#define ESCAPE_KEY 0x1B
+#define ESCAPE_KEY '`'
+//Vertical Tab Ctrl+K
+#define TOGGLE_KEY 0x0B
+char im_buffer[IM_BUFFER_LEN+1];
 char im_buffer_pos = 0;
+int im_on = 1;
 //recursive search, returns -1 on failure
 //searches from [start, end)
 int im_search(char * input, int start, int end) {
@@ -11,7 +21,7 @@ int im_search(char * input, int start, int end) {
 	}
 	//test for middle, works even for 1 width middle=start
 	int middle = start + (end-start)/2;
-	printf("testing:%s\n",im_table[middle][0]);
+	//printf("testing:%s\n",im_table[middle][0]);
 	int test = strncmp(im_table[middle][0], input, IM_TABLE_ENTRY_LEN);
 	if (test == 0) {
 		return middle;
@@ -37,57 +47,75 @@ int im_search(char * input, int start, int end) {
 }
 //returns output len, since we want to be able to handle null bytes as well
 int update_im_state(char input, char * output) {
-	if ( ('a' <= input <= 'z')||('0' <= input <= '9')||(input == ' ') ) {
-		if (im_buffer_pos < IM_BUFFER_LEN) {
+	if (input == TOGGLE_KEY) {
+		im_on = !im_on;
+		//clears the im buffer if its toggling off
+		if (!im_on) {
+			im_buffer[0] = 0;
+			im_buffer_pos = 0;
+		}
+	}
+	//just exit if the im is off
+	if (!im_on) {
+		output[0] = input;
+		output[1] = 0;
+		return 1;
+	}
+	if ( ('a' <= input && input <= 'z')||('0' <= input && input  <= '9')||(input == ' ') ) {
+		if ( (im_buffer_pos < IM_BUFFER_LEN) && (im_buffer_pos < IM_TABLE_ENTRY_LEN) ){
 			im_buffer[im_buffer_pos] = input;
 			im_buffer_pos++;
+			im_buffer[im_buffer_pos] = 0;
 		} else {
 			//passthrough
 			output[0] = input;
 			output[1] = 0;
 			return 1;
 		}
-	}
-	int im_entry = im_search(im_buffer,0, IM_TABLE_LEN);
-	if (im_entry != -1) {
-		strncpy(output, im_table[im_entry][1], IM_TABLE_ENTRY_LEN);
-		im_buffer[0] = 0;
-		im_buffer_pos = 0;
-		return strlen(im_table[im_entry][1]);
-	}
-	//these only do something if there's something in the buffer, otherwise
-	//passthrough
-	if (im_buffer_pos > 0) {
-		switch (input) {
-			//escape, cancels
-			case 0x1B:
-				im_buffer[0] = 0;
-				im_buffer_pos = 0;
-				return 0;
-			break;
-			//enter, enters the buffer
-			case 0x0A:
-				for (int i = 0; i <im_buffer_pos; i++) {
-					output[i] = im_buffer[i];
-				}
-				output[im_buffer_pos] = 0;
-				int tmp = im_buffer_pos;
-				im_buffer_pos = 0;
-				return tmp;
-			break;
-			//backspace
-			case 0x08:
-				if (im_buffer_pos > 0) {
-					im_buffer_pos--;
-					im_buffer[im_buffer_pos] = 0;
-				}
-				return 0;
-			break;
+		//if there's a match return it
+		int im_entry = im_search(im_buffer, 0, IM_TABLE_LEN);
+		if (im_entry != -1) {
+			//clear the buffer
+			im_buffer[0] = 0;
+			im_buffer_pos = 0;
+			strncpy(output, im_table[im_entry][1], IM_TABLE_ENTRY_LEN);
+			return strlen(im_table[im_entry][1]);
+		}
+	} else {
+		//these only do something if there's something in the buffer, otherwise
+		//passthrough
+		if (im_buffer_pos > 0) {
+			switch (input) {
+				//escape, cancels
+				case ESCAPE_KEY:
+					im_buffer[0] = 0;
+					im_buffer_pos = 0;
+					return 0;
+				break;
+				//enter, enters the buffer
+				case ENTER_KEY:
+					for (int i = 0; i <im_buffer_pos; i++) {
+						output[i] = im_buffer[i];
+					}
+					output[im_buffer_pos] = 0;
+					int tmp = im_buffer_pos;
+					im_buffer_pos = 0;
+					return tmp;
+				break;
+				//backspace
+				case BACKSPACE_KEY:
+					if (im_buffer_pos > 0) {
+						im_buffer_pos--;
+						im_buffer[im_buffer_pos] = 0;
+					}
+					return 0;
+				break;
+			}
 		}
+		//default behavior of passthrough
+		output[0] = input;
+		output[1] = 0;
+		return 1;
 	}
-	//default behavior of passthrough
-	output[0] = input;
-	output[1] = 0;
-	return 1;
 	
 }
-- 
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