From 23cf39d6af6130b830399a939b90e34bebc63c6e Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Thu, 7 Feb 2019 21:22:14 -0500
Subject: Add make syntax to hi

---
 bin/hi.c      | 53 +++++++++++++++++++++++++++++++++++++++++++++--------
 bin/man1/hi.1 | 10 +++++++---
 2 files changed, 52 insertions(+), 11 deletions(-)

diff --git a/bin/hi.c b/bin/hi.c
index 4a48eb44..5c9d89dd 100644
--- a/bin/hi.c
+++ b/bin/hi.c
@@ -34,6 +34,7 @@ enum Class {
 	String,
 	Escape,
 	Format,
+	Interp,
 	Comment,
 	Todo,
 	ClassCount,
@@ -47,20 +48,22 @@ struct Syntax {
 	size_t subexp;
 };
 
-#define CKB "(^|[^[:alnum:]_]|\n)"
+#define WB "(^|[^[:alnum:]_]|\n)"
+#define TODO_PATTERN "FIXME|TODO|XXX"
+
 static const struct Syntax CSyntax[] = {
 	{ Keyword, .subexp = 2,
-		.pattern = CKB"(auto|extern|register|static|(_T|t)hread_local)"CKB },
+		.pattern = WB"(auto|extern|register|static|(_T|t)hread_local)"WB },
 	{ Keyword, .subexp = 2,
-		.pattern = CKB"(const|inline|restrict|volatile)"CKB },
+		.pattern = WB"(const|inline|restrict|volatile)"WB },
 	{ Keyword, .subexp = 2,
-		.pattern = CKB"((_A|a)lignas|_Atomic|(_N|n)oreturn)"CKB },
+		.pattern = WB"((_A|a)lignas|_Atomic|(_N|n)oreturn)"WB },
 	{ Keyword, .subexp = 2,
-		.pattern = CKB"(enum|struct|typedef|union)"CKB },
+		.pattern = WB"(enum|struct|typedef|union)"WB },
 	{ Keyword, .subexp = 2,
-		.pattern = CKB"(case|default|do|else|for|if|switch|while)"CKB },
+		.pattern = WB"(case|default|do|else|for|if|switch|while)"WB },
 	{ Keyword, .subexp = 2,
-		.pattern = CKB"(break|continue|goto|return)"CKB },
+		.pattern = WB"(break|continue|goto|return)"WB },
 	{ Macro,
 		.pattern = "^#.*" },
 	{ String, .subexp = 1,
@@ -87,7 +90,36 @@ static const struct Syntax CSyntax[] = {
 	{ Comment,
 		.pattern = "^#if 0", .pattend = "^#endif" },
 	{ Todo, .parent = Comment,
-		.pattern = "FIXME|TODO|XXX" },
+		.pattern = TODO_PATTERN },
+};
+
+static const struct Syntax MakeSyntax[] = {
+	{ Keyword, .subexp = 2,
+		.pattern = WB"(\\.(PHONY|PRECIOUS|SUFFIXES))"WB },
+	{ Macro,
+		.pattern = "^ *-?include" },
+	{ String, .subexp = 1,
+		.pattern = "[[:alnum:]._]+[[:blank:]]*[!+:?]?=[[:blank:]]*(.*)" },
+	{ Normal,
+		.pattern = "^\t.*" },
+	{ String,
+		.pattern = "'([^']|\\\\')*'" },
+	{ String,
+		.pattern = "\"([^\"]|\\\\\")*\"" },
+	{ Interp,
+		.pattern = "\\$[^$]" },
+	// These Interp patterns handle one level of nesting with the same
+	// delimiter.
+	{ Interp,
+		.pattern = "\\$\\((" "[^$)]" "|" "\\$\\([^)]*\\)" ")*\\)" },
+	{ Interp,
+		.pattern = "\\$\\{(" "[^$}]" "|" "\\$\\{[^}]*\\}" ")*\\}" },
+	{ Escape,
+		.pattern = "\\$\\$" },
+	{ Comment,
+		.pattern = "#.*" },
+	{ Todo, .parent = Comment,
+		.pattern = TODO_PATTERN },
 };
 
 static const struct Language {
@@ -97,6 +129,7 @@ static const struct Language {
 	size_t len;
 } Languages[] = {
 	{ "c", "\\.[ch]$", CSyntax, ARRAY_LEN(CSyntax) },
+	{ "make", "Makefile$", MakeSyntax, ARRAY_LEN(MakeSyntax) },
 };
 
 static regex_t compile(const char *pattern, int flags) {
@@ -194,6 +227,7 @@ static const enum SGR ansiStyle[ClassCount][2] = {
 	[String]  = { ANSICyan },
 	[Escape]  = { ANSIDefault },
 	[Format]  = { ANSICyan, ANSIBold },
+	[Interp]  = { ANSIGreen },
 	[Comment] = { ANSIBlue },
 	[Todo]    = { ANSIBlue, ANSIBold },
 };
@@ -242,6 +276,7 @@ static const enum IRC ircStyle[ClassCount][2] = {
 	[String]  = { IRCCyan },
 	[Escape]  = { IRCDefault },
 	[Format]  = { IRCCyan, IRCBold },
+	[Interp]  = { IRCGreen },
 	[Comment] = { IRCBlue },
 	[Todo]    = { IRCBlue, IRCBold },
 };
@@ -299,6 +334,7 @@ static const char *ClassName[ClassCount] = {
 	[String]  = "String",
 	[Escape]  = "Escape",
 	[Format]  = "Format",
+	[Interp]  = "Interp",
 	[Comment] = "Comment",
 	[Todo]    = "Todo",
 };
@@ -322,6 +358,7 @@ static void htmlDocumentHeader(const char *path) {
 		".hi.String  { color: teal; }\n"
 		".hi.Escape  { color: black; }\n"
 		".hi.Format  { color: teal; font-weight: bold }\n"
+		".hi.Interp  { color: green; }\n"
 		".hi.Comment { color: navy; }\n"
 		".hi.Todo    { color: navy; font-weight: bold }\n"
 		"</style>\n"
diff --git a/bin/man1/hi.1 b/bin/man1/hi.1
index 2a97ba77..a40e3674 100644
--- a/bin/man1/hi.1
+++ b/bin/man1/hi.1
@@ -1,4 +1,4 @@
-.Dd February 6, 2019
+.Dd February 7, 2019
 .Dt HI 1
 .Os
 .
@@ -21,6 +21,8 @@ highlights the contents of a
 or standard input
 and formats it
 on standard output.
+A maximum of 32K
+is read from standard input.
 .
 .Pp
 The arguments are as follows:
@@ -44,7 +46,8 @@ may be inferred from its name.
 .
 .Pp
 The following languages are supported:
-.Cm c .
+.Cm c ,
+.Cm make .
 .
 .Pp
 The output formats are as follows:
@@ -60,5 +63,6 @@ fragment with
 .Sy <span>
 classes.
 .It Cm html-document
-HTML document with default styles.
+HTML document with
+.Sy <style> .
 .El
-- 
cgit 1.4.1