shortcode/shortcodes.rl

128 lines
2.5 KiB
Ragel

#include <stdio.h>
#include <string.h>
#include "bglibs/str.h"
#include "bglibs/gstack.h"
%%{
machine shortcode;
action mark {
mark = p;
}
spc = space*;
sep = space+;
path = (alnum | '/' )+;
name = (alpha+ path?)
> mark
% {str_cats(&output, "N ");
str_catb(&output, mark, p-mark);
str_cats(&output, "\n");
str_copyb(&new_name, mark, p-mark);
};
argname = alpha+
> mark
% {str_cats(&output, "A ");
str_catb(&output, mark, p-mark);
str_cats(&output, "\n");
};
qvalue = ('"' [^"]* '"')
> mark
% {str_cats(&output, "V ");
str_catb(&output, mark+1, p-mark-2);
str_cats(&output, "\n");
};
value = alnum+
> mark
% {str_cats(&output, "V ");
str_catb(&output, mark, p-mark);
str_cats(&output, "\n");
};
arg = ((argname '=')? (value|qvalue));
start_p = '{{%';
end_p = '%}}';
start_b = '{{<';
end_b = '>}}';
start = start_p | start_b ;
end = end_p | end_b ;
shortcode = (start spc name (sep arg)* spc end)
@ {
str_cats(&output, "+++ opening\n");
str_copy(&open_name, &new_name);
data_mark = p;
};
closing_shortcode = (start spc '/' name spc end)
> {
// Starting a shortcode, close data
str_copyb(&data, data_mark+1, p-data_mark-2);
};
matched_shortcode = (shortcode any* closing_shortcode)
@ {
str_cats(&output, "--- closing\n");
printf("closing from %s to %s\n", open_name.s, new_name.s);
printf("data: %s\n", data.s);
if (str_cmp(&open_name, 0, &new_name, 0) != 0) {
// Closing the wrong code
// TODO error reporting
return output;
}
str_truncate(&open_name,0);
};
main := (any* (shortcode | matched_shortcode))*;
}%%
str parse(char *input) {
%%write data;
char *eof, *ts, *te = 0;
int cs, act = 0;
char *p = input;
char *pe = p + strlen(input);
str open_name, new_name, output, data;
str_init(&open_name);
str_init(&new_name);
str_init(&output);
str_init(&data);
char *mark = p;
char *data_mark = p;
%% write init;
%% write exec;
return output;
}
struct shortcode {
str name;
str args;
str content;
};
int main(int argc, char **argv) {
str output = parse("
sarasa
{{< o1 arg1 >}}
stuff
{{< c1 arg2 >}}foobar{{% /c1%}}
{{< o2 arg1 >}}
{{< o3 arg1 >}}
more stuff
");
// if (output == 0) {
// printf("parse error\n");
// return 1;
// }
printf("\n%s\n", output.s);
return 0;
}