change blang op meanings

README.md

@@ -16,11 +16,10 @@ Public domain. 2022 DTB.
 
 ## true(1)
 ```
-^ ; initialize state to 0
-% ; store state (0) into *stack
-; stack is destroyed, state becomes the final value of *stack
-; when the stack is destroyed, the program exits with the value of state
-$
+^ ; initialize hand to 0
+; set the chart pointer to 0 - this destroys the chart
+; and the program exits with the value of the hand
+* 
 ```
 
 ## Hello world:
@@ -28,5 +27,5 @@ $
 ; the <.> construct uses '<' to store the next value literally into state,
 ; does so, and uses '>' to output state literally
 <H><e><l><l><o><,>< ><w><o><r><l><d><!><
->^%$
+>^*
 ```

src/blang.h

@@ -3,5 +3,5 @@
 struct State{
 	unsigned char hand;
 	char *chart;
-}
+};
 #endif

src/ops.c

@@ -1,5 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "blang.h"
 
@@ -17,11 +18,11 @@ void Ops_carat(struct State *s){
 }
 
 void Ops_ampersand(struct State *s){
-	s->hand = s->chart;
+	s->hand = (char)s->chart;
 }
 
 void Ops_splat(struct State *s){
-	s->chart = s->hand;
+	s->chart = (char *)s->hand;
 }
 
 void Ops_plus(struct State *s){
@@ -41,6 +42,8 @@ void Ops_left(struct State *s){
 }
 
 void Ops_semi(struct State *s){
+	int c;
+
 	while(
 		(c = getc(stdin)) != EOF
 		&& strchr("!\n", c) == NULL
@@ -57,10 +60,9 @@ void Ops_cross(struct State *s){
 const struct {
 	unsigned char name;
 	void (*f)(struct State *);
-} *OPS[] = {
-	{ '$', Ops_dollar },
+} OPS[] = {
 	{ '%', Ops_percent },
-	{ '^', Ops_caret },
+	{ '^', Ops_carat },
 	{ '&', Ops_ampersand },
 	{ '*', Ops_splat },
 	{ '+', Ops_plus },
@@ -80,7 +82,7 @@ const struct {
 
 /* Slower than a switch but you don't have to update it when you add new
  * ops! */
-(void(struct State *)) Ops_lookup(char op){
+void (*Ops_lookup(char op))(struct State *){
 	size_t i;
 
 	for(i = 0; i < (sizeof OPS)/(sizeof *OPS); ++i)

src/ops.h

@@ -1,4 +1,4 @@
 #if !defined _BLANG_OPS
 #	define _BLANG_OPS 1
-(void(struct State *)) Ops_lookup(char op);
+void (*Ops_lookup(char op))(struct State *);
 #endif