add a module system

.gitignore

@@ -1,2 +1,3 @@
 tags
 bspc
+tstatus

Makefile

@@ -1,8 +1,8 @@
-bspc:
-	cc bspc.c -o bspc -lxcb -Wall -Wextra -std=c99
+tstatus:
+	cc tstatus.c -o tstatus -lxcb -Wall -Wextra -std=c99
 
 debug:
-	cc bspc.c -o bspc -lxcb -Wall -Wextra -std=c99 -ggdb
+	cc tstatus.c -o tstatus -lxcb -Wall -Wextra -std=c99 -ggdb
 
 clean:
-	rm bspc
+	rm tstatus

bspc.c

@@ -27,6 +27,8 @@
 #define SOCKET_ENV_VAR   "BSPWM_SOCKET"
 #define FAILURE_MESSAGE  "\x07"
 
+#define LENGTH(x)         (sizeof(x) / sizeof(*x))
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
@@ -42,6 +44,8 @@
 #include <fcntl.h>
 #include <ctype.h>
 
+#include "module.h"
+
 /* prototypes */
 void warn(char *fmt, ...);
 void err(char *fmt, ...);
@@ -279,23 +283,22 @@ char *send_msg_to_bspwm(char *args[], int count)
 	return NULL;
 }
 
-int main(void) {
-	char final[64], current[2];
+int bspwm_update(struct module *module) {
+	char current[2];
 	char *occupied[] = {"query", "-D", "-d", ".occupied", "--names"};
 	char *focused[] = {"query", "-D", "-d", ".focused", "--names"};
 	char *result;
-	int count = 5;
 
-	result = send_msg_to_bspwm(occupied, count);
+	result = send_msg_to_bspwm(occupied, LENGTH(occupied));
 	if(!result) {
 		printf("error: sending message to bspwm failed!\n");
 
 		return 1;
 	}
 
-	memcpy(&final, result, 64);
+	memcpy(&module->buffer, result, MODULE_BUFFER_LEN);
 
-	result = send_msg_to_bspwm(focused, count);
+	result = send_msg_to_bspwm(focused, LENGTH(focused));
 	if(!result) {
 		printf("error: sending message to bspwm failed!\n");
 
@@ -305,19 +308,18 @@ int main(void) {
 	memcpy(&current, result, 2);
 	current[1] = '\0';
 
-	for(int i = 0; i < 64; i++) {
-		if(final[i] == '\0') {
+	for(int i = 0; i < MODULE_BUFFER_LEN; i++) {
+		if(module->buffer[i] == '\0') {
 			/* XXX: susceptible to buffer underflow */
-			if (i) final[i - 1] = '\0';
+			if(i) module->buffer[i - 1] = '\0';
 			break;
 		}
-		if(isdigit(final[i]) && *current == final[i])
+		if(isdigit(module->buffer[i]) && *current == module->buffer[i])
 			/* XXX: susceptible to buffer overflow */
-			final[i + 1] = '<';
-		if(final[i] == '\n')
-			final[i] = ' ';
+			if(i == MODULE_BUFFER_LEN) module->buffer[i + 1] = '<';
+		if(module->buffer[i] == '\n')
+			module->buffer[i] = ' ';
 	}
-	printf("%s", final);
 
 	return 0;
 }

module.h

@@ -0,0 +1,11 @@
+#ifndef TSTATUS_MODULE_H
+#define MODULE_BUFFER_LEN 64
+struct module {
+	int update; /* update interval in seconds */
+	int termcode; /* update termcode */
+
+	int (*updatecallback)(struct module *); /* update function */
+	char buffer[MODULE_BUFFER_LEN]; /* buffer for text */
+};
+#endif
+#define TSTATUS_MODULE_H

tstatus.c

@@ -0,0 +1,13 @@
+#include "bspc.c"
+#include "module.h"
+
+struct module table[] = {
+	{0, 10, bspwm_update, {'\0'}},
+};
+
+int main(void) {
+	table[0].updatecallback(&table[0]);
+	printf("%s\n", table[0].buffer);
+
+	return 0;
+}