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authorJohn MacFarlane <jgm@berkeley.edu>2015-06-15 11:28:52 -0700
committerJohn MacFarlane <jgm@berkeley.edu>2015-06-15 11:28:52 -0700
commitd55f1130acf9708de4f74556767251f8ed85e356 (patch)
tree568baf2594b64c091c5b5bc31697378384710f65 /src
parentfbeb28c9bd35823f179a69e051faa93d01124ebd (diff)
inlines.c: Added utility functions to skip spaces and line endings.
Diffstat (limited to 'src')
-rw-r--r--src/inlines.c58
1 files changed, 41 insertions, 17 deletions
diff --git a/src/inlines.c b/src/inlines.c
index a96a479..28250e1 100644
--- a/src/inlines.c
+++ b/src/inlines.c
@@ -50,6 +50,12 @@ typedef struct {
delimiter *last_delim;
} subject;
+static inline bool
+S_is_line_end_char(char c)
+{
+ return (c == '\n' || c == '\r');
+}
+
static delimiter*
S_insert_emph(subject *subj, delimiter *opener, delimiter *closer);
@@ -191,6 +197,32 @@ static inline int is_eof(subject* subj)
// Advance the subject. Doesn't check for eof.
#define advance(subj) (subj)->pos += 1
+static inline bool
+skip_spaces(subject *subj)
+{
+ bool skipped = false;
+ while (peek_char(subj) == ' ') {
+ advance(subj);
+ skipped = true;
+ }
+ return skipped;
+}
+
+static inline bool
+skip_line_end(subject *subj)
+{
+ bool seen_line_end_char = false;
+ if (peek_char(subj) == '\r') {
+ advance(subj);
+ seen_line_end_char = true;
+ }
+ if (peek_char(subj) == '\n') {
+ advance(subj);
+ seen_line_end_char = true;
+ }
+ return seen_line_end_char || is_eof(subj);
+}
+
// Take characters while a predicate holds, and return a string.
static inline cmark_chunk take_while(subject* subj, int (*f)(int))
{
@@ -605,8 +637,7 @@ static cmark_node* handle_backslash(subject *subj)
if (cmark_ispunct(nextchar)) { // only ascii symbols and newline can be escaped
advance(subj);
return make_str(cmark_chunk_dup(&subj->input, subj->pos - 1, 1));
- } else if (nextchar == '\r' || nextchar == '\n') {
- advance(subj);
+ } else if (!is_eof(subj) && skip_line_end(subj)) {
return make_linebreak();
} else {
return make_str(cmark_chunk_literal("\\"));
@@ -948,9 +979,7 @@ static cmark_node* handle_newline(subject *subj)
// skip over newline
advance(subj);
// skip spaces at beginning of line
- while (peek_char(subj) == ' ') {
- advance(subj);
- }
+ skip_spaces(subj);
if (nlpos > 1 &&
peek_at(subj, nlpos - 1) == ' ' &&
peek_at(subj, nlpos - 2) == ' ') {
@@ -1081,7 +1110,8 @@ static int parse_inline(subject* subj, cmark_node * parent, int options)
subj->pos = endpos;
// if we're at a newline, strip trailing spaces.
- if (peek_char(subj) == '\r' || peek_char(subj) == '\n') {
+ if (peek_char(subj) == '\r' ||
+ peek_char(subj) == '\n') {
cmark_chunk_rtrim(&contents);
}
@@ -1108,11 +1138,9 @@ extern void cmark_parse_inlines(cmark_node* parent, cmark_reference_map *refmap,
// Parse zero or more space characters, including at most one newline.
static void spnl(subject* subj)
{
- bool seen_newline = false;
- while (peek_char(subj) == ' ' ||
- (!seen_newline &&
- (seen_newline = peek_char(subj) == '\r' || peek_char(subj) == '\n'))) {
- advance(subj);
+ skip_spaces(subj);
+ if (skip_line_end(subj)) {
+ skip_spaces(subj);
}
}
@@ -1166,12 +1194,8 @@ bufsize_t cmark_parse_reference_inline(cmark_strbuf *input, cmark_reference_map
title = cmark_chunk_literal("");
}
// parse final spaces and newline:
- while (peek_char(&subj) == ' ') {
- advance(&subj);
- }
- if (peek_char(&subj) == '\r' || peek_char(&subj) == '\n') {
- advance(&subj);
- } else if (peek_char(&subj) != 0) {
+ skip_spaces(&subj);
+ if (!skip_line_end(&subj)) {
return 0;
}
// insert reference into refmap