diff --git a/src/parser.rs b/src/parser.rs
index 6e7ab29..21e8609 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -31,6 +31,16 @@ use crate::{
 use core::mem::size_of;
 use core::ptr::{self, addr_of_mut};
 
+macro_rules! PEEK_TOKEN {
+    ($parser:expr) => {
+        if (*$parser).token_available != 0 || yaml_parser_fetch_more_tokens($parser) != 0 {
+            (*$parser).tokens.head
+        } else {
+            ptr::null_mut::<yaml_token_t>()
+        }
+    };
+}
+
 macro_rules! SKIP_TOKEN {
     ($parser:expr) => {
         (*$parser).token_available = 0_i32;
@@ -163,12 +173,7 @@ unsafe fn yaml_parser_parse_stream_start(
     mut parser: *mut yaml_parser_t,
     mut event: *mut yaml_event_t,
 ) -> libc::c_int {
-    let token: *mut yaml_token_t =
-        if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+    let token: *mut yaml_token_t = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -209,11 +214,7 @@ unsafe fn yaml_parser_parse_document_start(
         start: ptr::null_mut::<yaml_tag_directive_t>(),
         end: ptr::null_mut::<yaml_tag_directive_t>(),
     };
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -222,12 +223,7 @@ unsafe fn yaml_parser_parse_document_start(
             == YAML_DOCUMENT_END_TOKEN as libc::c_int as libc::c_uint
         {
             SKIP_TOKEN!(parser);
-            token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0
-            {
-                (*parser).tokens.head
-            } else {
-                ptr::null_mut::<yaml_token_t>()
-            };
+            token = PEEK_TOKEN!(parser);
             if token.is_null() {
                 return 0_i32;
             }
@@ -299,11 +295,7 @@ unsafe fn yaml_parser_parse_document_start(
         {
             return 0_i32;
         }
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if !token.is_null() {
             if (*token).type_ as libc::c_uint
                 != YAML_DOCUMENT_START_TOKEN as libc::c_int as libc::c_uint
@@ -380,12 +372,7 @@ unsafe fn yaml_parser_parse_document_content(
     mut parser: *mut yaml_parser_t,
     event: *mut yaml_event_t,
 ) -> libc::c_int {
-    let token: *mut yaml_token_t =
-        if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+    let token: *mut yaml_token_t = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -411,12 +398,7 @@ unsafe fn yaml_parser_parse_document_end(
 ) -> libc::c_int {
     let mut end_mark: yaml_mark_t;
     let mut implicit: libc::c_int = 1_i32;
-    let token: *mut yaml_token_t =
-        if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+    let token: *mut yaml_token_t = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -467,11 +449,7 @@ unsafe fn yaml_parser_parse_node(
         column: 0,
     };
     let implicit: libc::c_int;
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -499,12 +477,7 @@ unsafe fn yaml_parser_parse_node(
             start_mark = (*token).start_mark;
             end_mark = (*token).end_mark;
             SKIP_TOKEN!(parser);
-            token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0
-            {
-                (*parser).tokens.head
-            } else {
-                ptr::null_mut::<yaml_token_t>()
-            };
+            token = PEEK_TOKEN!(parser);
             if token.is_null() {
                 current_block = 17786380918591080555;
             } else if (*token).type_ as libc::c_uint
@@ -515,13 +488,7 @@ unsafe fn yaml_parser_parse_node(
                 tag_mark = (*token).start_mark;
                 end_mark = (*token).end_mark;
                 SKIP_TOKEN!(parser);
-                token = if (*parser).token_available != 0
-                    || yaml_parser_fetch_more_tokens(parser) != 0
-                {
-                    (*parser).tokens.head
-                } else {
-                    ptr::null_mut::<yaml_token_t>()
-                };
+                token = PEEK_TOKEN!(parser);
                 if token.is_null() {
                     current_block = 17786380918591080555;
                 } else {
@@ -537,12 +504,7 @@ unsafe fn yaml_parser_parse_node(
             start_mark = tag_mark;
             end_mark = (*token).end_mark;
             SKIP_TOKEN!(parser);
-            token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0
-            {
-                (*parser).tokens.head
-            } else {
-                ptr::null_mut::<yaml_token_t>()
-            };
+            token = PEEK_TOKEN!(parser);
             if token.is_null() {
                 current_block = 17786380918591080555;
             } else if (*token).type_ as libc::c_uint
@@ -551,13 +513,7 @@ unsafe fn yaml_parser_parse_node(
                 anchor = (*token).data.anchor.value;
                 end_mark = (*token).end_mark;
                 SKIP_TOKEN!(parser);
-                token = if (*parser).token_available != 0
-                    || yaml_parser_fetch_more_tokens(parser) != 0
-                {
-                    (*parser).tokens.head
-                } else {
-                    ptr::null_mut::<yaml_token_t>()
-                };
+                token = PEEK_TOKEN!(parser);
                 if token.is_null() {
                     current_block = 17786380918591080555;
                 } else {
@@ -864,11 +820,7 @@ unsafe fn yaml_parser_parse_block_sequence_entry(
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
     if first != 0 {
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if if (*parser).marks.top != (*parser).marks.end
             || yaml_stack_extend(
                 addr_of_mut!((*parser).marks.start) as *mut *mut libc::c_void,
@@ -890,22 +842,14 @@ unsafe fn yaml_parser_parse_block_sequence_entry(
         }
         SKIP_TOKEN!(parser);
     }
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
     if (*token).type_ as libc::c_uint == YAML_BLOCK_ENTRY_TOKEN as libc::c_int as libc::c_uint {
         let mark: yaml_mark_t = (*token).end_mark;
         SKIP_TOKEN!(parser);
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if token.is_null() {
             return 0_i32;
         }
@@ -971,22 +915,14 @@ unsafe fn yaml_parser_parse_indentless_sequence_entry(
     mut event: *mut yaml_event_t,
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
     if (*token).type_ as libc::c_uint == YAML_BLOCK_ENTRY_TOKEN as libc::c_int as libc::c_uint {
         let mark: yaml_mark_t = (*token).end_mark;
         SKIP_TOKEN!(parser);
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if token.is_null() {
             return 0_i32;
         }
@@ -1042,11 +978,7 @@ unsafe fn yaml_parser_parse_block_mapping_key(
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
     if first != 0 {
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if if (*parser).marks.top != (*parser).marks.end
             || yaml_stack_extend(
                 addr_of_mut!((*parser).marks.start) as *mut *mut libc::c_void,
@@ -1068,22 +1000,14 @@ unsafe fn yaml_parser_parse_block_mapping_key(
         }
         SKIP_TOKEN!(parser);
     }
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
     if (*token).type_ as libc::c_uint == YAML_KEY_TOKEN as libc::c_int as libc::c_uint {
         let mark: yaml_mark_t = (*token).end_mark;
         SKIP_TOKEN!(parser);
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if token.is_null() {
             return 0_i32;
         }
@@ -1150,22 +1074,14 @@ unsafe fn yaml_parser_parse_block_mapping_value(
     event: *mut yaml_event_t,
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
     if (*token).type_ as libc::c_uint == YAML_VALUE_TOKEN as libc::c_int as libc::c_uint {
         let mark: yaml_mark_t = (*token).end_mark;
         SKIP_TOKEN!(parser);
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if token.is_null() {
             return 0_i32;
         }
@@ -1210,11 +1126,7 @@ unsafe fn yaml_parser_parse_flow_sequence_entry(
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
     if first != 0 {
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if if (*parser).marks.top != (*parser).marks.end
             || yaml_stack_extend(
                 addr_of_mut!((*parser).marks.start) as *mut *mut libc::c_void,
@@ -1236,11 +1148,7 @@ unsafe fn yaml_parser_parse_flow_sequence_entry(
         }
         SKIP_TOKEN!(parser);
     }
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -1251,13 +1159,7 @@ unsafe fn yaml_parser_parse_flow_sequence_entry(
                 == YAML_FLOW_ENTRY_TOKEN as libc::c_int as libc::c_uint
             {
                 SKIP_TOKEN!(parser);
-                token = if (*parser).token_available != 0
-                    || yaml_parser_fetch_more_tokens(parser) != 0
-                {
-                    (*parser).tokens.head
-                } else {
-                    ptr::null_mut::<yaml_token_t>()
-                };
+                token = PEEK_TOKEN!(parser);
                 if token.is_null() {
                     return 0_i32;
                 }
@@ -1337,12 +1239,7 @@ unsafe fn yaml_parser_parse_flow_sequence_entry_mapping_key(
     mut parser: *mut yaml_parser_t,
     event: *mut yaml_event_t,
 ) -> libc::c_int {
-    let token: *mut yaml_token_t =
-        if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+    let token: *mut yaml_token_t = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -1384,21 +1281,13 @@ unsafe fn yaml_parser_parse_flow_sequence_entry_mapping_value(
     event: *mut yaml_event_t,
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
     if (*token).type_ as libc::c_uint == YAML_VALUE_TOKEN as libc::c_int as libc::c_uint {
         SKIP_TOKEN!(parser);
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if token.is_null() {
             return 0_i32;
         }
@@ -1436,12 +1325,7 @@ unsafe fn yaml_parser_parse_flow_sequence_entry_mapping_end(
     mut parser: *mut yaml_parser_t,
     mut event: *mut yaml_event_t,
 ) -> libc::c_int {
-    let token: *mut yaml_token_t =
-        if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+    let token: *mut yaml_token_t = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -1464,11 +1348,7 @@ unsafe fn yaml_parser_parse_flow_mapping_key(
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
     if first != 0 {
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if if (*parser).marks.top != (*parser).marks.end
             || yaml_stack_extend(
                 addr_of_mut!((*parser).marks.start) as *mut *mut libc::c_void,
@@ -1490,11 +1370,7 @@ unsafe fn yaml_parser_parse_flow_mapping_key(
         }
         SKIP_TOKEN!(parser);
     }
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -1505,13 +1381,7 @@ unsafe fn yaml_parser_parse_flow_mapping_key(
                 == YAML_FLOW_ENTRY_TOKEN as libc::c_int as libc::c_uint
             {
                 SKIP_TOKEN!(parser);
-                token = if (*parser).token_available != 0
-                    || yaml_parser_fetch_more_tokens(parser) != 0
-                {
-                    (*parser).tokens.head
-                } else {
-                    ptr::null_mut::<yaml_token_t>()
-                };
+                token = PEEK_TOKEN!(parser);
                 if token.is_null() {
                     return 0_i32;
                 }
@@ -1529,12 +1399,7 @@ unsafe fn yaml_parser_parse_flow_mapping_key(
         }
         if (*token).type_ as libc::c_uint == YAML_KEY_TOKEN as libc::c_int as libc::c_uint {
             SKIP_TOKEN!(parser);
-            token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0
-            {
-                (*parser).tokens.head
-            } else {
-                ptr::null_mut::<yaml_token_t>()
-            };
+            token = PEEK_TOKEN!(parser);
             if token.is_null() {
                 return 0_i32;
             }
@@ -1616,11 +1481,7 @@ unsafe fn yaml_parser_parse_flow_mapping_value(
     empty: libc::c_int,
 ) -> libc::c_int {
     let mut token: *mut yaml_token_t;
-    token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-        (*parser).tokens.head
-    } else {
-        ptr::null_mut::<yaml_token_t>()
-    };
+    token = PEEK_TOKEN!(parser);
     if token.is_null() {
         return 0_i32;
     }
@@ -1630,11 +1491,7 @@ unsafe fn yaml_parser_parse_flow_mapping_value(
     }
     if (*token).type_ as libc::c_uint == YAML_VALUE_TOKEN as libc::c_int as libc::c_uint {
         SKIP_TOKEN!(parser);
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if token.is_null() {
             return 0_i32;
         }
@@ -1747,11 +1604,7 @@ unsafe fn yaml_parser_process_directives(
         0_i32
     } == 0)
     {
-        token = if (*parser).token_available != 0 || yaml_parser_fetch_more_tokens(parser) != 0 {
-            (*parser).tokens.head
-        } else {
-            ptr::null_mut::<yaml_token_t>()
-        };
+        token = PEEK_TOKEN!(parser);
         if !token.is_null() {
             loop {
                 if !((*token).type_ as libc::c_uint
@@ -1833,13 +1686,7 @@ unsafe fn yaml_parser_process_directives(
                     }
                 }
                 SKIP_TOKEN!(parser);
-                token = if (*parser).token_available != 0
-                    || yaml_parser_fetch_more_tokens(parser) != 0
-                {
-                    (*parser).tokens.head
-                } else {
-                    ptr::null_mut::<yaml_token_t>()
-                };
+                token = PEEK_TOKEN!(parser);
                 if token.is_null() {
                     current_block = 17143798186130252483;
                     break;