From 3a5abb2538905a0f7243811aa453073bdf4f7ac2 Mon Sep 17 00:00:00 2001
From: Nate Choe <natechoe9@gmail.com>
Date: Sun, 1 May 2022 02:45:05 -0500
Subject: [PATCH] Inline code spans

---
 src/include/inlines.h | 26 +++++++++++++
 src/inlines.c         | 87 +++++++++++++++++++++++++++++++++++++++++++
 src/template.c        | 22 +++++------
 3 files changed, 123 insertions(+), 12 deletions(-)
 create mode 100644 src/include/inlines.h
 create mode 100644 src/inlines.c

diff --git a/src/include/inlines.h b/src/include/inlines.h
new file mode 100644
index 0000000..966272c
--- /dev/null
+++ b/src/include/inlines.h
@@ -0,0 +1,26 @@
+/*
+   ncdg - A program to help generate natechoe.dev
+   Copyright (C) 2022  Nate Choe (natechoe9@gmail.com)
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+#ifndef HAVE_INLINES
+#define HAVE_INLINES
+
+#include <stdio.h>
+
+void writeline(char *data, FILE *out);
+void writedata(char *data, size_t len, FILE *out);
+
+#endif
diff --git a/src/inlines.c b/src/inlines.c
new file mode 100644
index 0000000..2d967d2
--- /dev/null
+++ b/src/inlines.c
@@ -0,0 +1,87 @@
+#include <string.h>
+
+#include <inlines.h>
+
+static const char *punctuation = "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~";
+struct escape {
+	char c;
+	char *code;
+};
+struct escape escapes[] = {
+	{'<', "&lt;"},
+	{'>', "&gt;"},
+	{'&', "&amp;"},
+};
+
+static int writecodespan(char *data, int i, size_t len, FILE *out);
+static void writeescaped(char *data, size_t len, FILE *out);
+static void writechescape(char c, FILE *out);
+
+void writeline(char *data, FILE *out) {
+	writedata(data, strlen(data), out);
+}
+
+void writedata(char *data, size_t len, FILE *out) {
+	int i;
+	for (i = 0; i < len; ++i) {
+		int newi;
+		if ((newi = writecodespan(data, i, len, out)) >= 0)
+			goto special;
+		if (data[i] == '\\') {
+			if (strchr(punctuation, data[i + 1]) == NULL)
+				writechescape('\\', out);
+			++i;
+		}
+		writechescape(data[i], out);
+		continue;
+special:
+		i = newi - 1;
+	}
+}
+
+static int writecodespan(char *data, int i, size_t len, FILE *out) {
+	int ticklen;
+	int start, end;
+
+	if (data[i] != '`')
+		return -1;
+	for (ticklen = 0; data[i + ticklen] == '`'; ++ticklen) ;
+
+	start = i + ticklen;
+	for (end = start; end < len; ++end) {
+		int thislen;
+		if (data[end] != '`')
+			continue;
+		for (thislen = 0; data[end + thislen] == '`'; ++thislen);
+		if (ticklen == thislen)
+			break;
+		end += thislen - 1;
+	}
+	if (end >= len) {
+		for (i = 0; i < ticklen; ++i)
+			fputc('`', out);
+		return start + ticklen;
+	}
+
+	fputs("<code>", out);
+	writeescaped(data + start, end - start, out);
+	fputs("</code>", out);
+	return end + ticklen;
+}
+
+static void writeescaped(char *data, size_t len, FILE *out) {
+	int i;
+	for (i = 0; i < len; ++i)
+		writechescape(data[i], out);
+}
+
+static void writechescape(char c, FILE *out) {
+	int i;
+	for (i = 0; i < sizeof escapes / sizeof *escapes; ++i) {
+		if (escapes[i].c == c) {
+			fputs(escapes[i].code, out);
+			return;
+		}
+	}
+	fputc(c, out);
+}
diff --git a/src/template.c b/src/template.c
index 25f20a7..39e9b94 100644
--- a/src/template.c
+++ b/src/template.c
@@ -23,6 +23,7 @@
 #include <io.h>
 #include <util.h>
 #include <mdutil.h>
+#include <inlines.h>
 #include <template.h>
 
 struct parsestate {
@@ -80,12 +81,10 @@ static int parseline(char *line, struct parsestate *currstate, FILE *out) {
 				type.data.intensity >=
 				currstate->intensity) {
 			currstate->prev.type = EMPTY;
-			fputs("</code>", out);
+			fputs("</code></pre>", out);
 			return 0;
 		}
-		if (!currstate->isfirst)
-			fputs("<br>", out);
-		fputs(line, out);
+		fprintf(out, "%s\n", line);
 		currstate->isfirst = 0;
 		return 0;
 	case HTMLCONCRETE:
@@ -124,7 +123,7 @@ static int parseline(char *line, struct parsestate *currstate, FILE *out) {
 			return 1;
 		currstate->prev.type = EMPTY;
 		fputs("<h1>", out);
-		fwrite(currstate->para->data, 1, currstate->para->len, out);
+		writedata(currstate->para->data, currstate->para->len, out);
 		fputs("</h1>", out);
 		resetstring(currstate->para);
 		break;
@@ -133,7 +132,7 @@ static int parseline(char *line, struct parsestate *currstate, FILE *out) {
 			goto hr;
 		currstate->prev.type = EMPTY;
 		fputs("<h2>", out);
-		fwrite(currstate->para->data, 1, currstate->para->len, out);
+		writedata(currstate->para->data, currstate->para->len, out);
 		fputs("</h2>", out);
 		resetstring(currstate->para);
 		break;
@@ -169,7 +168,7 @@ static int parseline(char *line, struct parsestate *currstate, FILE *out) {
 		 * as to not include the wrong tags.
 		 * */
 	case FENCECODE:
-		fputs("<code class='block'>", out);
+		fputs("<pre><code>", out);
 		currstate->prev.type = FENCECODE;
 		currstate->isfirst = 1;
 		currstate->intensity = type.data.intensity;
@@ -186,10 +185,9 @@ static int parseline(char *line, struct parsestate *currstate, FILE *out) {
 		break;
 	case HEADER:
 		endpara(currstate, out);
-		fprintf(out, "<h%d>%s</h%d>",
-				type.data.intensity,
-				realcontent(line, &type),
-				type.data.intensity);
+		fprintf(out, "<h%d>", type.data.intensity);
+		writeline(realcontent(line, &type), out);
+		fprintf(out, "</h%d>", type.data.intensity);
 		currstate->prev.type = EMPTY;
 		break;
 	case HTMLCONCRETE:
@@ -225,7 +223,7 @@ static int endpara(struct parsestate *state, FILE *out) {
 		return 0;
 	case PLAIN:
 		fputs("<p>", out);
-		fwrite(state->para->data, 1, state->para->len, out);
+		writedata(state->para->data, state->para->len, out);
 		fputs("</p>", out);
 		resetstring(state->para);
 		return 0;