99 lines
2.0 KiB
Ragel
99 lines
2.0 KiB
Ragel
#include <stdio.h>
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#include "bstrlib/bstrlib.h"
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bstring grab_chunk(char *start, char *end) {
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blk2bstr(start, end-start);
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}
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%%{
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machine shortcode;
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action mark {
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mark = p;
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}
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spc = space*;
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sep = space+;
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path = (alnum | '/' )+;
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name = (alpha+ path?)
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> mark
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% {bcatStatic(output, "N ");
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bcatblk(output, mark, p-mark);
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bcatStatic(output, "\n");
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bassignblk (new_name, mark, p-mark);
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};
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argname = alpha+
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> mark
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% {bcatStatic(output, "A ");
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bcatblk(output, mark, p-mark);
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bcatStatic(output, "\n");
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};
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qvalue = ('"' [^"]* '"')
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> mark
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% {bcatStatic(output, "V ");
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bcatblk(output, mark+1, p-mark-2);
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bcatStatic(output, "\n");
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};
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value = alnum+
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> mark
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% {bcatStatic(output, "V ");
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bcatblk(output, mark, p-mark);
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bcatStatic(output, "\n");
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};
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arg = ((argname '=')? (value|qvalue));
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start_p = '{{%';
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end_p = '%}}';
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start_b = '{{<';
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end_b = '>}}';
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start = start_p | start_b ;
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end = end_p | end_b ;
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shortcode = (start spc name (sep arg)* spc end)
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@ {
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bcatStatic(output, "+++ opening\n");
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bassign(open_name, new_name);
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};
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closing_shortcode = (start spc '/' name spc end)
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@ {
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bcatStatic(output, "--- closing\n");
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// TODO: fail on error.
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// TODO: Use a stack of open shortcodes rather than 1
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printf("closing from %s to %s", open_name->data, new_name->data);
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};
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main := (any* (shortcode | closing_shortcode))*;
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}%%
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bstring parse(char *input) {
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%%write data;
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char *eof, *ts, *te = 0;
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int cs, act = 0;
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char *p = input;
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char *pe = p + strlen(input);
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bstring open_name = bfromcstr("");
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bstring new_name = bfromcstr("");
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char *mark = 0;
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bstring output = bfromcstr("");
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%% write init;
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%% write exec;
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return output;
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}
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int main(int argc, char **argv) {
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bstring output = parse("
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{{< o1 arg1 >}}
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{{% /c1%}}");
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printf("\n%s\n", output->data);
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return 0;
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}
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