diff --git a/CMakeLists.txt b/CMakeLists.txt
index 650efde..82467f7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@ option(BUILD_TESTS "Build test programs" OFF)
 option(ENABLE_PROFILING "Enable asan" OFF)
 mark_as_advanced(ENABLE_PROFILING)
 
-set(SOURCE_LIST "src/rjp_ordered_object.c" "src/rjp_unordered_object.c" "src/input.c" "src/output.c" "src/rjp_array.c" "src/rjp.c" "src/rjp_object.c" "src/rjp_string.c" "src/tree.c")
+set(SOURCE_LIST "src/rjp_lex.c" "src/rjp_ordered_object.c" "src/rjp_unordered_object.c" "src/rjp_parse.c" "src/output.c" "src/rjp_array.c" "src/rjp.c" "src/rjp_object.c" "src/rjp_string.c" "src/tree.c")
 if(ENABLE_SHARED)
 	add_library(rjp SHARED ${SOURCE_LIST})
 	set_target_properties(rjp PROPERTIES SOVERSION "${rjp_VERSION_MAJOR}.${rjp_VERSION_MINOR}.${rjp_VERSION_REVISION}")
diff --git a/include/rjp_lex.h b/include/rjp_lex.h
new file mode 100644
index 0000000..3e7664d
--- /dev/null
+++ b/include/rjp_lex.h
@@ -0,0 +1,59 @@
+#ifndef RJP_LEX_H
+#define RJP_LEX_H
+
+#include "rjp.h"
+
+#define rjp_lex_accept 1
+typedef enum RJP_lex_category{
+	rjp_lex_start = 0,
+	rjp_lex_obracket = 3,
+	rjp_lex_obrace   = 5,
+	rjp_lex_cbracket = 7,
+	rjp_lex_cbrace   = 9,
+	rjp_lex_spaces   = 11,
+	rjp_lex_quote    = 12,
+	rjp_lex_t        = 14,
+	rjp_lex_tr       = 16,
+	rjp_lex_tru      = 18,
+	rjp_lex_true     = 19,
+	rjp_lex_f        = 20,
+	rjp_lex_fa       = 22,
+	rjp_lex_fal      = 24,
+	rjp_lex_fals     = 26,
+	rjp_lex_false    = 27,
+	rjp_lex_n        = 28,
+	rjp_lex_nu       = 30,
+	rjp_lex_nul      = 32,
+	rjp_lex_null     = 33,
+	rjp_lex_escaped  = 34,
+	rjp_lex_string   = 35,
+	rjp_lex_comma    = 37,
+	rjp_lex_colon    = 39,
+	rjp_lex_number   = 41,
+	rjp_lex_decimal  = 42,
+	rjp_lex_fnumber  = 43,
+	rjp_lex_fnum_e   = 44,
+	rjp_lex_sci_num  = 45,
+	rjp_lex_slash    = 46,
+	rjp_lex_line_comment  = 47,
+	rjp_lex_signed_number   = 49,
+	rjp_lex_sci_num_signed  = 51,
+	rjp_lex_newlines = 53,
+	rjp_lex_block_comment_start = 54,
+	rjp_lex_block_comment_end1 = 56,
+	rjp_lex_block_comment = 57,
+	rjp_lex_invalid  = 1000,
+	rjp_lex_unrecognized_word = 1002,
+	rjp_lex_end = 1004,
+}RJP_lex_category;
+
+typedef struct RJP_lex_state{
+	const char* str;
+	RJP_lex_category node;
+	RJP_index length;
+	RJP_index offset;
+}RJP_lex_state;
+
+RJP_lex_category irjp_lex(RJP_lex_state* state);
+
+#endif
diff --git a/src/rjp_lex.c b/src/rjp_lex.c
new file mode 100644
index 0000000..cc166f8
--- /dev/null
+++ b/src/rjp_lex.c
@@ -0,0 +1,281 @@
+#include "rjp_lex.h"
+#include "rjp.h"
+#include <ctype.h> //isalpha, etc
+
+static RJP_lex_category irjp_lex_accept(RJP_lex_category val, RJP_lex_state* state){
+	state->node = rjp_lex_start;
+	return val;
+}
+static int irjp_is_space(char ch){
+	switch(ch){
+	case ' ':
+	case '\t':
+	case '\f':
+	case '\v':
+		return 1;
+	};
+	return 0;
+}
+static inline RJP_lex_category irjp_lex_do_start(char ch){
+	switch(ch){
+	case 0:
+		return rjp_lex_end;
+	case '{':
+		return rjp_lex_obrace;
+	case '}':
+		return rjp_lex_cbrace;
+	case '[':
+		return rjp_lex_obracket;
+	case ']':
+		return rjp_lex_cbracket;
+	case '"':
+		return rjp_lex_quote;
+	case ',':
+		return rjp_lex_comma;
+	case ':':
+		return rjp_lex_colon;
+	case 't':
+		return rjp_lex_t;
+	case 'f':
+		return rjp_lex_f;
+	case 'n':
+		return rjp_lex_n;
+	case '/':
+		return rjp_lex_slash;
+	case '+':
+	case '-':
+		return rjp_lex_signed_number;
+	case '\n':
+	case '\r':
+		return rjp_lex_newlines;
+	case ' ':
+	case '\t':
+	case '\v':
+	case '\f':
+		return rjp_lex_spaces;
+	case '0':
+	case '1':
+	case '2':
+	case '3':
+	case '4':
+	case '5':
+	case '6':
+	case '7':
+	case '8':
+	case '9':
+		return rjp_lex_number;
+	default:
+		break;
+	};
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_spaces(char ch){
+	if(irjp_is_space(ch))
+		return rjp_lex_spaces;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_number(char ch){
+	if(isdigit(ch))
+		return rjp_lex_number;
+	if(ch == '.')
+		return rjp_lex_decimal;
+	if(isalpha(ch))
+		return rjp_lex_unrecognized_word;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_signed_num(char ch){
+	switch(ch){
+	case '-':
+	case '+':
+		return rjp_lex_number;
+	};
+	return irjp_lex_do_number(ch);
+}
+static inline RJP_lex_category irjp_lex_do_decimal(char ch){
+	if(isdigit(ch))
+		return rjp_lex_fnumber;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_fnumber(char ch){
+	if(isdigit(ch))
+		return rjp_lex_fnumber;
+	if(ch == 'e' || ch == 'E')
+		return rjp_lex_fnum_e;
+	if(isalpha(ch))
+		return rjp_lex_unrecognized_word;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_fnum_e(char ch){
+	if(ch == '-' || ch == '+')
+		return rjp_lex_sci_num_signed;
+	if(isdigit(ch))
+		return rjp_lex_sci_num;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_sci_num_signed(char ch){
+	if(isdigit(ch))
+		return rjp_lex_sci_num;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_sci_num(char ch){
+	if(isdigit(ch))
+		return rjp_lex_sci_num;
+	if(isalpha(ch))
+		return rjp_lex_unrecognized_word;
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_quote(char ch){
+	switch(ch){
+	case '\\':
+		return rjp_lex_escaped;
+	case '\n':
+	case '\r':
+		return rjp_lex_invalid;
+	case '"':
+		return rjp_lex_string;
+	};
+	return rjp_lex_quote;
+}
+static inline RJP_lex_category irjp_lex_do_slash(char ch){
+	switch(ch){
+	case '/':
+		return rjp_lex_line_comment;
+	case '*':
+		return rjp_lex_block_comment_start;
+	};
+	return rjp_lex_invalid;
+}
+static inline RJP_lex_category irjp_lex_do_line_comment(char ch){
+	switch(ch){
+	case '\n':
+	case '\r':
+	case 0:
+		return rjp_lex_invalid;
+	};
+	return rjp_lex_line_comment;
+}
+static inline RJP_lex_category irjp_lex_do_block_comment_start(char ch){
+	if(ch == '*')
+		return rjp_lex_block_comment_end1;
+	return rjp_lex_block_comment_start;
+}
+static inline RJP_lex_category irjp_lex_do_block_comment_end1(char ch){
+	if(ch == '/')
+		return rjp_lex_block_comment;
+	return rjp_lex_block_comment_start;
+}
+static RJP_lex_category irjp_lex_char(char ch, RJP_lex_category node){
+	switch(node){
+	case rjp_lex_start:
+		return irjp_lex_do_start(ch);
+	//whitespace
+	case rjp_lex_spaces:
+		return irjp_lex_do_spaces(ch);
+
+	//numbers
+	case rjp_lex_signed_number:
+		return irjp_lex_do_signed_num(ch);
+	case rjp_lex_number:
+		return irjp_lex_do_number(ch);
+	case rjp_lex_decimal:
+		return irjp_lex_do_decimal(ch);
+	case rjp_lex_fnumber:
+		return irjp_lex_do_fnumber(ch);
+	case rjp_lex_fnum_e:
+		return irjp_lex_do_fnum_e(ch);
+	case rjp_lex_sci_num_signed:
+		return irjp_lex_do_sci_num_signed(ch);
+	case rjp_lex_sci_num:
+		return irjp_lex_do_sci_num(ch);
+
+	//strings
+	case rjp_lex_quote:
+		return irjp_lex_do_quote(ch);
+	case rjp_lex_escaped:
+		return rjp_lex_quote;
+
+	//comments
+	case rjp_lex_slash:
+		return irjp_lex_do_slash(ch);
+	case rjp_lex_line_comment:
+		return irjp_lex_do_line_comment(ch);
+	case rjp_lex_block_comment_start:
+		return irjp_lex_do_block_comment_start(ch);
+	case rjp_lex_block_comment_end1:
+		return irjp_lex_do_block_comment_end1(ch);
+
+	//true
+	case rjp_lex_t:
+		if(ch != 'r')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_tr;
+	case rjp_lex_tr:
+		if(ch != 'u')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_tru;
+	case rjp_lex_tru:
+		if(ch != 'e')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_true;
+
+	//false
+	case rjp_lex_f:
+		if(ch != 'a')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_fa;
+	case rjp_lex_fa:
+		if(ch != 'l')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_fal;
+	case rjp_lex_fal:
+		if(ch != 's')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_fals;
+	case rjp_lex_fals:
+		if(ch != 'e')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_false;
+
+	//null
+	case rjp_lex_n:
+		if(ch != 'u')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_nu;
+	case rjp_lex_nu:
+		if(ch != 'l')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_nul;
+	case rjp_lex_nul:
+		if(ch != 'l')
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_null;
+
+	case rjp_lex_true:
+	case rjp_lex_false:
+	case rjp_lex_null:
+		if(!isalnum(ch))
+			return rjp_lex_invalid;
+		return rjp_lex_unrecognized_word;
+
+	case rjp_lex_unrecognized_word:
+		if(isalnum(ch))
+			return rjp_lex_unrecognized_word;
+		return rjp_lex_invalid;
+	default:
+		return rjp_lex_invalid;
+	};
+	return node;
+}
+RJP_lex_category irjp_lex(RJP_lex_state* state){
+	state->offset += state->length;
+	state->length = 0;
+	for(const char* c = state->str+state->offset;1;++c,++state->length){
+		RJP_lex_category cat = irjp_lex_char(*c, state->node);
+		if(cat == rjp_lex_invalid)
+			return irjp_lex_accept(state->node, state);
+		state->node = cat;
+		if(*c == 0)
+			break;
+	}
+	return irjp_lex_accept(state->node, state);
+}
diff --git a/src/input.c b/src/rjp_parse.c
similarity index 60%
rename from src/input.c
rename to src/rjp_parse.c
index 0bd88f3..cfc18f7 100644
--- a/src/input.c
+++ b/src/rjp_parse.c
@@ -23,55 +23,12 @@
 #include "rjp_value.h"
 #include "rjp_string.h"
 #include "memory.h"
+#include "rjp_lex.h"
 #include <stdlib.h> //strtod, strtol
-#include <ctype.h> //isalpha, etc
 #include <string.h> //memcpy
 
-#define RJP_INITIAL_PARSE_DEPTH 16
 
-#define rjp_lex_accept 1
-typedef enum RJP_lex_category{
-	rjp_lex_start = 0,
-	rjp_lex_obracket = 3,
-	rjp_lex_obrace   = 5,
-	rjp_lex_cbracket = 7,
-	rjp_lex_cbrace   = 9,
-	rjp_lex_spaces   = 11,
-	rjp_lex_quote    = 12,
-	rjp_lex_t        = 14,
-	rjp_lex_tr       = 16,
-	rjp_lex_tru      = 18,
-	rjp_lex_true     = 19,
-	rjp_lex_f        = 20,
-	rjp_lex_fa       = 22,
-	rjp_lex_fal      = 24,
-	rjp_lex_fals     = 26,
-	rjp_lex_false    = 27,
-	rjp_lex_n        = 28,
-	rjp_lex_nu       = 30,
-	rjp_lex_nul      = 32,
-	rjp_lex_null     = 33,
-	rjp_lex_escaped  = 34,
-	rjp_lex_string   = 35,
-	rjp_lex_comma    = 37,
-	rjp_lex_colon    = 39,
-	rjp_lex_number   = 41,
-	rjp_lex_decimal  = 42,
-	rjp_lex_fnumber  = 43,
-	rjp_lex_fnum_e   = 44,
-	rjp_lex_sci_num  = 45,
-	rjp_lex_slash    = 46,
-	rjp_lex_line_comment  = 47,
-	rjp_lex_signed_number   = 49,
-	rjp_lex_sci_num_signed  = 51,
-	rjp_lex_newlines = 53,
-	rjp_lex_block_comment_start = 54,
-	rjp_lex_block_comment_end1 = 56,
-	rjp_lex_block_comment = 57,
-	rjp_lex_invalid  = 1000,
-	rjp_lex_unrecognized_word = 1002,
-	rjp_lex_end = 1004,
-}RJP_lex_category;
+#define RJP_INITIAL_PARSE_DEPTH 16
 
 typedef enum RJP_yacc_target{
 	rjp_yacc_end,
@@ -86,12 +43,6 @@ typedef enum RJP_yacc_target{
 	rjp_yacc_obj_comma
 }RJP_yacc_target;
 
-typedef struct RJP_lex_state{
-	const char* str;
-	RJP_lex_category node;
-	RJP_index length;
-	RJP_index offset;
-}RJP_lex_state;
 typedef struct RJP_yacc_stack{
 	RJP_yacc_target* stack;
 	RJP_index position;
@@ -140,208 +91,6 @@ static void irjp_yacc_stack_set(RJP_yacc_stack* s, RJP_yacc_target target){
 	s->stack[s->position] = target;
 }
 
-static RJP_lex_category irjp_lex_accept(RJP_lex_category val, RJP_lex_state* state){
-	state->node = rjp_lex_start;
-	return val;
-}
-static RJP_lex_category irjp_lex_char(char ch, RJP_lex_category node){
-	switch(node){
-	case rjp_lex_start:
-		if(ch == 0)
-			return rjp_lex_end;
-		else if(ch == '{')
-			return rjp_lex_obrace;
-		else if(ch == '}')
-			return rjp_lex_cbrace;
-		else if(ch == '[')
-			return rjp_lex_obracket;
-		else if(ch == ']')
-			return rjp_lex_cbracket;
-		else if(ch == '"')
-			return rjp_lex_quote;
-		else if(ch == ',')
-			return rjp_lex_comma;
-		else if(ch == ':')
-			return rjp_lex_colon;
-		else if(isdigit(ch))
-			return rjp_lex_number;
-		else if(ch == '+' || ch == '-')
-			return rjp_lex_signed_number;
-		else if(ch == '\n' || ch == '\r')
-			return rjp_lex_newlines;
-		else if(isspace(ch))
-			return rjp_lex_spaces;
-		else if(ch == 't')
-			return rjp_lex_t;
-		else if(ch == 'f')
-			return rjp_lex_f;
-		else if(ch == 'n')
-			return rjp_lex_n;
-		else if(ch == '/')
-			return rjp_lex_slash;
-		return rjp_lex_invalid;
-
-	//whitespace
-	case rjp_lex_spaces:
-		if(isspace(ch))
-			break;
-		return rjp_lex_invalid;
-
-	//numbers
-	case rjp_lex_signed_number:
-		if(ch == '-' || ch == '+'){
-			return rjp_lex_number;
-		}else{
-		//fallthrough
-	case rjp_lex_number:
-			if(isdigit(ch))
-				return rjp_lex_number;
-			if(ch == '.')
-				return rjp_lex_decimal;
-			else if(isalpha(ch))
-				return rjp_lex_unrecognized_word;
-		}
-		return rjp_lex_invalid;
-	case rjp_lex_decimal:
-		if(isdigit(ch))
-			return rjp_lex_fnumber;
-		return rjp_lex_invalid;
-	case rjp_lex_fnumber:
-		if(isdigit(ch))
-			break;
-		else if(ch == 'e' || ch == 'E')
-			return rjp_lex_fnum_e;
-		else if(isalpha(ch))
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_invalid;
-	case rjp_lex_fnum_e:
-		if(ch == '-' || ch == '+')
-			return rjp_lex_sci_num_signed;
-		else if(isdigit(ch))
-			return rjp_lex_sci_num;
-		return rjp_lex_invalid;
-	case rjp_lex_sci_num_signed:
-		if(isdigit(ch))
-			return rjp_lex_sci_num;
-		return rjp_lex_unrecognized_word;
-	case rjp_lex_sci_num:
-		if(isdigit(ch))
-			break;
-		else if(isalpha(ch))
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_invalid;
-
-	//strings
-	case rjp_lex_quote:
-		if(ch == '\\')
-			return rjp_lex_escaped;
-		else if(ch == '\n' || ch == '\r')
-			return rjp_lex_invalid;
-		else if(ch == '"')
-			return rjp_lex_string;
-		break;
-	case rjp_lex_escaped:
-		return rjp_lex_quote;
-	case rjp_lex_string:
-		return rjp_lex_invalid;
-
-	//comments
-	case rjp_lex_slash:
-		if(ch == '/')
-			return rjp_lex_line_comment;
-		else if(ch == '*')
-			return rjp_lex_block_comment_start;
-		return rjp_lex_invalid;
-	case rjp_lex_line_comment:
-		if(ch == '\n' || ch == '\r' || ch == 0) //don't consume this character
-			return rjp_lex_invalid;
-		break;
-	case rjp_lex_block_comment_start:
-		if(ch == '*')
-			return rjp_lex_block_comment_end1;
-		break;
-	case rjp_lex_block_comment_end1:
-		if(ch == '/')
-			return rjp_lex_block_comment;
-		return rjp_lex_block_comment_start;
-
-	//true
-	case rjp_lex_t:
-		if(ch != 'r')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_tr;
-	case rjp_lex_tr:
-		if(ch != 'u')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_tru;
-	case rjp_lex_tru:
-		if(ch != 'e')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_true;
-
-	//false
-	case rjp_lex_f:
-		if(ch != 'a')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_fa;
-	case rjp_lex_fa:
-		if(ch != 'l')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_fal;
-	case rjp_lex_fal:
-		if(ch != 's')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_fals;
-	case rjp_lex_fals:
-		if(ch != 'e')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_false;
-
-	//null
-	case rjp_lex_n:
-		if(ch != 'u')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_nu;
-	case rjp_lex_nu:
-		if(ch != 'l')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_nul;
-	case rjp_lex_nul:
-		if(ch != 'l')
-			return rjp_lex_unrecognized_word;
-		return rjp_lex_null;
-
-	case rjp_lex_true:
-	case rjp_lex_false:
-	case rjp_lex_null:
-		if(!isalnum(ch))
-			return rjp_lex_invalid;
-		return rjp_lex_unrecognized_word;
-
-	case rjp_lex_unrecognized_word:
-		if(isalnum(ch))
-			break;
-		return rjp_lex_invalid;
-		//fallthrough
-	default:
-		return rjp_lex_invalid;
-	};
-	return node;
-}
-static RJP_lex_category irjp_lex(RJP_lex_state* state){
-	state->offset += state->length;
-	state->length = 0;
-	for(const char* c = state->str+state->offset;1;++c,++state->length){
-		RJP_lex_category cat = irjp_lex_char(*c, state->node);
-		if(cat == rjp_lex_invalid)
-			return irjp_lex_accept(state->node, state);
-		state->node = cat;
-		if(*c == 0)
-			break;
-	}
-	return irjp_lex_accept(state->node, state);
-}
-
 static int irjp_init_value(RJP_value* newval, RJP_lex_category cat, RJP_yacc_state* state){
 	RJP_index length = state->lexstate.length;
 	RJP_index offset = state->lexstate.offset;