From 9b25546e5859f36d7fe5def6eb642fa94685f78b Mon Sep 17 00:00:00 2001
From: Matteo Bini <matteobin@tiepi.it>
Date: Mon, 15 Jul 2024 20:52:30 +0200
Subject: [PATCH] Standard input

---
 srohtml.c | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/srohtml.c b/srohtml.c
index 76bc55d..168f3a5 100644
--- a/srohtml.c
+++ b/srohtml.c
@@ -11,6 +11,7 @@
 #define FAVICON "data:image/gif;base64,R0lGODlhEAAQAKEAAAAAcP///wAAcAAAcCH5BAEKAAIALAAAAAAQABAAQAIwlBWZxxwAQWjtTQRvlZhTnGSfYT3eZ3WaE4mjGa1UasoH7c6tzYanfqmhJMKXglcAADs="
 #define LANG_LEN 2
 #define LINE_MAX 1000
+#define LINE_START 80
 #define NOTES_START 8
 #define NOTES_MAX_DIGITS 3
 
@@ -51,7 +52,7 @@ static void cmd_tm(const char *line);
 static void cmd_ur(const char *line);
 static void footer(void);
 static void footnotes(void);
-static int fread_line(FILE *file, char **str, size_t *len);
+static size_t fread_line(FILE *file, char **str, size_t *len);
 static void indent_str(char **str);
 static void page_head(void);
 static void print_help(void);
@@ -570,26 +571,31 @@ footnotes(void)
 	string_cat(&body, "\t\t</div>\n");
 }
 
-int
+size_t
 fread_line(FILE *file, char **str, size_t *len)
 {
 	int c;
-	char *end;
 	size_t i;
 
-	i = 0;
-	while ((c = fgetc(file)) && c != '\n' && c != EOF && i < LINE_MAX)
-		i++;
-	
-	*str = safe_malloc(i + 1);
+	if (*str == NULL) {
+		*len = LINE_START + 1;
+		*str = safe_malloc(sizeof(char) * *len);
+	}
+
+	i = 0;
+	while ((c = fgetc(file)) && c != '\n' && c != EOF && i < LINE_MAX) {
+		if (i >= *len - 1) {
+			*len *= 2;
+			*str = safe_realloc(*str, sizeof(char) * *len);
+		}
+		(*str)[i] = c;
+		i++;
+	}
 
-	fseek(file, -i - 1, SEEK_CUR);
-	fread(*str, 1, i, file);
 	(*str)[i] = '\0';
 	*len = i;
-	fseek(file, 1, SEEK_CUR);
 
-	return c == EOF ? EOF : c;
+	return c == EOF ? EOF : i;
 }
 
 void
@@ -649,6 +655,8 @@ main (int argc, char *argv[])
 	sitography.size = NOTES_START;
 	sitography.notes = malloc(sizeof(note) * sitography.size);
 
+	len = 0;
+	line = NULL;
 	while (fread_line(in, &line, &len) != EOF) {
 		if (!len)
 			cmd_close();
@@ -669,6 +677,8 @@ main (int argc, char *argv[])
 			space = 1;
 		}
 		free(line);
+		len = 0;
+		line = NULL;
 	}
 	free(line);
 	if (in != stdin)