From: Fletcher T. Penney <fletcher@fletcherpenney.net>
Date: Sun, 19 Mar 2017 15:42:25 +0000 (-0400)
Subject: ADDED: Add support for random footnote numbers
X-Git-Tag: 6.0.0-rc2^2~4
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0a4d50d7053aa2d25ebb014937d9f903d341a42f;p=multimarkdown

ADDED: Add support for random footnote numbers
---

diff --git a/Sources/libMultiMarkdown/html.c b/Sources/libMultiMarkdown/html.c
index de383e9..b7992f8 100644
--- a/Sources/libMultiMarkdown/html.c
+++ b/Sources/libMultiMarkdown/html.c
@@ -651,7 +651,7 @@ void mmd_export_token_html(DString * out, const char * source, token * t, scratc
 				print_const("<p>");
 
 			mmd_export_token_tree_html(out, source, t->child, scratch);
-
+			
 			if (scratch->citation_being_printed) {
 				scratch->footnote_para_counter--;
 
@@ -664,7 +664,12 @@ void mmd_export_token_html(DString * out, const char * source, token * t, scratc
 				scratch->footnote_para_counter--;
 
 				if (scratch->footnote_para_counter == 0) {
-					printf(" <a href=\"#fnref:%d\" title=\"%s\" class=\"reversefootnote\">&#160;&#8617;</a>", scratch->footnote_being_printed, LC("return to body"));
+					temp_short = scratch->footnote_being_printed;
+					if (scratch->extensions & EXT_RANDOM_FOOT) {
+						srand(scratch->random_seed_base + temp_short);
+						temp_short = rand() % 32000 + 1;
+					}
+					printf(" <a href=\"#fnref:%d\" title=\"%s\" class=\"reversefootnote\">&#160;&#8617;</a>", temp_short, LC("return to body"));
 				}
 			}
 
@@ -1289,13 +1294,27 @@ void mmd_export_token_html(DString * out, const char * source, token * t, scratc
 				if (temp_short2 == scratch->used_footnotes->size) {
 					// This is a re-use of a previously used note
 
+					if (scratch->extensions & EXT_RANDOM_FOOT) {
+						srand(scratch->random_seed_base + temp_short);
+						temp_short3 = rand() % 32000 + 1;
+					} else {
+						temp_short3 = temp_short;
+					}
+
 					printf("<a href=\"#fn:%d\" title=\"%s\" class=\"footnote\">[%d]</a>",
-						temp_short, LC("see footnote"), temp_short);
+						temp_short3, LC("see footnote"), temp_short);
 				} else {
 					// This is the first time this note was used
 
+					if (scratch->extensions & EXT_RANDOM_FOOT) {
+						srand(scratch->random_seed_base + temp_short);
+						temp_short3 = rand() % 32000 + 1;
+					} else {
+						temp_short3 = temp_short;
+					}
+
 					printf("<a href=\"#fn:%d\" id=\"fnref:%d\" title=\"%s\" class=\"footnote\">[%d]</a>",
-						temp_short, temp_short, LC("see footnote"), temp_short);
+						temp_short3, temp_short3, LC("see footnote"), temp_short);
 				}
 			} else {
 				// Note-based syntax disabled
diff --git a/Sources/libMultiMarkdown/writer.c b/Sources/libMultiMarkdown/writer.c
index a3b3351..2d3eb97 100644
--- a/Sources/libMultiMarkdown/writer.c
+++ b/Sources/libMultiMarkdown/writer.c
@@ -138,6 +138,12 @@ scratch_pad * scratch_pad_new(mmd_engine * e, short format) {
 
 		p->odf_para_type = BLOCK_PARA;
 
+		if (e->extensions & EXT_RANDOM_FOOT) {
+			p->random_seed_base = rand() % 32000;
+		} else {
+			p->random_seed_base = 0;
+		}
+
 		// Store links in a hash for rapid retrieval when exporting
 		p->link_hash = NULL;
 		link * l;
diff --git a/Sources/libMultiMarkdown/writer.h b/Sources/libMultiMarkdown/writer.h
index 08ed9f3..86e8046 100644
--- a/Sources/libMultiMarkdown/writer.h
+++ b/Sources/libMultiMarkdown/writer.h
@@ -88,6 +88,8 @@ typedef struct {
 	struct fn_holder *	footnote_hash;
 	short				footnote_being_printed;
 
+	int 				random_seed_base;
+
 	stack *				used_citations;
 	stack *				inline_citations_to_free;
 	struct fn_holder *	citation_hash;
diff --git a/Sources/multimarkdown/main.c b/Sources/multimarkdown/main.c
index d595e5f..61fbf64 100644
--- a/Sources/multimarkdown/main.c
+++ b/Sources/multimarkdown/main.c
@@ -77,7 +77,7 @@
 
 // argtable structs
 struct arg_lit *a_help, *a_version, *a_compatibility, *a_nolabels, *a_batch,
-		*a_accept, *a_reject, *a_full, *a_snippet;
+		*a_accept, *a_reject, *a_full, *a_snippet, *a_random;
 struct arg_str *a_format, *a_lang;
 struct arg_file *a_file, *a_o;
 struct arg_end *a_end;
@@ -153,6 +153,7 @@ int main(int argc, char** argv) {
 		a_compatibility	= arg_lit0("c", "compatibility", "Markdown compatibility mode"),
 		a_full			= arg_lit0("f", "full", "force a complete document"),
 		a_snippet		= arg_lit0("s", "snippet", "force a snippet"),
+		a_random		= arg_lit0("", "random", "use random numbers for footnote anchors"),
 
 		a_rem2			= arg_rem("", ""),
 
@@ -244,6 +245,11 @@ int main(int argc, char** argv) {
 		extensions |= EXT_SNIPPET;
 	}
 
+	if (a_random->count > 0) {
+		// Use random anchors
+		extensions |= EXT_RANDOM_FOOT;
+	}
+
 	if (a_format->count > 0) {
 		if (strcmp(a_format->sval[0], "html") == 0)
 			format = FORMAT_HTML;