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Autolinks

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This commit is contained in:
Nate Choe
2022-05-01 05:12:58 -05:00
parent 7f896ec133
commit 30301b0ca9
1 changed files with 38 additions and 0 deletions
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38
src/inlines.c
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@@ -1,3 +1,4 @@
#include <ctype.h>
#include <string.h>
#include <util.h>
@@ -18,6 +19,7 @@ struct escape escapes[] = {
static int writecodespan(char *data, int i, size_t len, FILE *out);
static int writelink(char *data, int i, size_t len, FILE *out);
static int writeimage(char *data, int i, size_t len, FILE *out);
static int writeautolink(char *data, int i, size_t len, FILE *out);
static int getlinkinfo(char *data, int i, size_t len,
int *textstart, int *textend,
int *titlestart, int *titleend,
@@ -39,6 +41,8 @@ void writedata(char *data, size_t len, FILE *out) {
goto special;
if ((newi = writeimage(data, i, len, out)) >= 0)
goto special;
if ((newi = writeautolink(data, i, len, out)) >= 0)
goto special;
if (data[i] == '\\') {
if (strchr(punctuation, data[i + 1]) == NULL)
writechescape('\\', out);
@@ -125,6 +129,40 @@ static int writeimage(char *data, int i, size_t len, FILE *out) {
return i;
}
static int writeautolink(char *data, int i, size_t len, FILE *out) {
int j, linkstart, linkend;
if (data[i++] != '<')
return -1;
linkstart = i;
if (!isalpha(data[i]))
return -1;
for (j = 1; j < 32 && i + j < len; ++j) {
char c;
c = data[i + j];
if (!isalpha(c) && !isdigit(c) && strchr("+.-", c) == NULL)
break;
}
if ((i += j) >= len)
return -1;
if (data[i] != ':')
return -1;
for (++i; i < len; ++i) {
if (isctrl(data[i]) || strchr(" <>", data[i]) != NULL)
break;
}
if (i >= len || data[i] != '>')
return -1;
linkend = i++;
fputs("<a href='", out);
writeescaped(data + linkstart, linkend - linkstart, out);
fputs("'>", out);
writeescaped(data + linkstart, linkend - linkstart, out);
fputs("</a>", out);
return i;
}
static int getlinkinfo(char *data, int i, size_t len,
int *textstart, int *textend,
int *titlestart, int *titleend,