Replace header ifdef guards with #pragma once

tools/hashtable.h

@@ -1,5 +1,4 @@
-#ifndef HASHTABLE_H_
-#define HASHTABLE_H_
+#pragma once
 
 typedef unsigned int (*HashFunc)(const void *item);
 typedef int (*HashValueCmpFunc)(const void *a, const void *b);
@@ -9,5 +8,3 @@ struct HashTable *hashtable_new(HashFunc func, HashValueCmpFunc cmp, int size, i
 void hashtable_free(struct HashTable *ht);
 void hashtable_insert(struct HashTable *ht, const void *value);
 void *hashtable_query(struct HashTable *ht, const void *value);
-
-#endif // HASHTABLE_H_

tools/libmio0.h

@@ -1,5 +1,4 @@
-#ifndef LIBMIO0_H_
-#define LIBMIO0_H_
+#pragma once
 
 // defines
 
@@ -46,5 +45,3 @@ int mio0_decode_file(const char *in_file, unsigned long offset, const char *out_
 // in_file: input filename containing raw data to be encoded
 // out_file: output filename to write MIO0 compressed data to
 int mio0_encode_file(const char *in_file, const char *out_file);
-
-#endif // LIBMIO0_H_

tools/n64cksum.h

@@ -1,5 +1,4 @@
-#ifndef N64CKSUM_H_
-#define N64CKSUM_H_
+#pragma once
 
 #include <stdint.h>
 
@@ -12,5 +11,3 @@ void n64cksum_calc_6102(unsigned char *buf, unsigned int cksum[]);
 // buf: buffer containing ROM data
 // checksums are written into the buffer
 void n64cksum_update_checksums(uint8_t *buf);
-
-#endif // N64CKSUM_H_

tools/n64graphics.h

@@ -1,5 +1,4 @@
-#ifndef N64GRAPHICS_H_
-#define N64GRAPHICS_H_
+#pragma once
 
 #include <stdint.h>
 
@@ -96,5 +95,3 @@ const char *n64graphics_get_read_version(void);
 
 // get version of underlying graphics writing library
 const char *n64graphics_get_write_version(void);
-
-#endif // N64GRAPHICS_H_

tools/n64graphics_ci_dir/n64graphics_ci.h

@@ -1,5 +1,4 @@
-#ifndef N64GRAPHICS_CI_H_
-#define N64GRAPHICS_CI_H_
+#pragma once
 
 #include <stdint.h>
 
@@ -38,5 +37,3 @@ const char *n64graphics_get_read_version(void);
 
 // get version of underlying graphics writing library
 const char *n64graphics_get_write_version(void);
-
-#endif

tools/n64graphics_ci_dir/utils.h

@@ -1,5 +1,4 @@
-#ifndef UTILS_H_
-#define UTILS_H_
+#pragma once
 
 #include <stdio.h>
 
@@ -149,5 +148,3 @@ void dir_list_free(dir_list *list);
 // suffix: string to see if 'str' ends with
 // returns 1 if 'str' ends with 'suffix'
 int str_ends_with(const char *str, const char *suffix);
-
-#endif // UTILS_H_

tools/utf8.h

@@ -1,6 +1,3 @@
-#ifndef UTF8_H_
-#define UTF8_H_
+#pragma once
 
 char *utf8_decode(char *str, uint32_t *codep);
-
-#endif // UTF8_H_

tools/utils.h

@@ -1,5 +1,4 @@
-#ifndef UTILS_H_
-#define UTILS_H_
+#pragma once
 
 #include <stdio.h>
 #include <stdint.h>
@@ -148,5 +147,3 @@ void dir_list_free(dir_list *list);
 // suffix: string to see if 'str' ends with
 // returns 1 if 'str' ends with 'suffix'
 int str_ends_with(const char *str, const char *suffix);
-
-#endif // UTILS_H_