138 lines
3.2 KiB
Ragel
138 lines
3.2 KiB
Ragel
#include <string.h>
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#include "shortcodes.h"
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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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%{ sc_list[c_sc].name.start = mark-start;
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sc_list[c_sc].name.len = p-mark;
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sc_list[c_sc].matching = 0;
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};
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argname = alpha+
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> mark
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% {
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sc_list[c_sc].argnames[sc_list[c_sc].argcount].start = mark-start;
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sc_list[c_sc].argnames[sc_list[c_sc].argcount].len = p-mark;
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};
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qvalue = ('"' [^"]* '"')
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> mark
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% {
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sc_list[c_sc].argvals[sc_list[c_sc].argcount].start = mark-start+1;
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sc_list[c_sc].argvals[sc_list[c_sc].argcount].len = p-mark-2;
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sc_list[c_sc].argcount++;
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};
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value = alnum+
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> mark
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% {
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sc_list[c_sc].argvals[sc_list[c_sc].argcount].start = mark-start;
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sc_list[c_sc].argvals[sc_list[c_sc].argcount].len = p-mark;
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sc_list[c_sc].argcount++;
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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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content = spc name (sep arg)* spc;
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start = start_p | start_b ;
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end = end_p | end_b ;
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mismatched = ((start_p content end_b) | (start_b content end_p))
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@{
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// Since it's mismatched, remove the name
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sc_list[c_sc].name.start = 0;
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sc_list[c_sc].name.len=0;
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result.errors[result.errcount].position = p-start-2;
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result.errors[result.errcount].code = ERR_MISMATCHED_BRACKET;
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result.errcount++;
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};
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shortcode = ((start_p content end_p) | (start_b content end_b))
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> {
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sc_list[c_sc].whole.start = p-start-1;
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}
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@ {
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sc_list[c_sc].whole.len = p-start-sc_list[c_sc].whole.start+1;
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data_mark = p+1;
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c_sc++;
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};
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closing_shortcode = (start spc '/' name spc end)
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> {
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// Starting a "closing" shortcode ( {{ /foo }}),
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// close data (if previous shortcode is opening)
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// If previous shortcode was closing, then previous
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// text can't be data.
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if (sc_list[c_sc-1].matching == 0) {
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sc_list[c_sc-1].data.start = data_mark-start;
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sc_list[c_sc-1].data.len = p-data_mark-1;
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}
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};
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matched_shortcode = (shortcode any* closing_shortcode)
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@ {
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if (
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sc_list[c_sc-1].name.len != sc_list[c_sc].name.len ||
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strncmp(
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start + sc_list[c_sc-1].name.start,
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start + sc_list[c_sc].name.start,
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sc_list[c_sc-1].name.len) !=0)
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{
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result.errors[result.errcount].position =
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sc_list[c_sc].whole.start;
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result.errors[result.errcount].code = ERR_MISMATCHED_CLOSING_TAG;
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result.errcount++;
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} else {
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// The previous shortcode is matching (mark it)
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sc_list[c_sc-1].matching = 1;
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sc_list[c_sc-1].whole.len = p-start-sc_list[c_sc-1].whole.start + 1;
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}
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// Do NOT increase c_sc
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};
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main := (any* (shortcode | matched_shortcode | mismatched))*;
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}%%
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sc_result parse(char *input, unsigned int len) {
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%%write data;
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char *eof = input + len;
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char *ts, *te = 0;
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int cs, act = 0;
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char *start = input;
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char *p = input;
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char *pe = p + len;
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sc_result result;
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result.errcount = 0;
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shortcode *sc_list = result.sc;
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int c_sc = 0;
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char *mark = p;
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char *data_mark = p;
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%% write init;
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%% write exec;
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result.sccount = c_sc;
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return result;
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}
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