shortcode/shortcodes.rl

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#include <stdio.h>
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#include <string.h>
#include "bglibs/str.h"
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%%{
machine shortcode;
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action mark {
mark = p;
}
spc = space*;
sep = space+;
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path = (alnum | '/' )+;
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name = (alpha+ path?)
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> mark
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%{ shortcodes[c_sc].name.start = mark-start;
shortcodes[c_sc].name.len = p-mark;
shortcodes[c_sc].matching = 0;
};
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argname = alpha+
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> mark
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% {};
qvalue = ('"' [^"]* '"')
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> mark
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% {};
value = alnum+
> mark
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% {};
arg = ((argname '=')? (value|qvalue));
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start_p = '{{%';
end_p = '%}}';
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start_b = '{{<';
end_b = '>}}';
start = start_p | start_b ;
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end = end_p | end_b ;
shortcode = (start spc name (sep arg)* spc end)
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> {
shortcodes[c_sc].start = p-start-1;
}
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@ {
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shortcodes[c_sc].len = p-start-shortcodes[c_sc].start+1;
data_mark = p+1;
c_sc++;
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};
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closing_shortcode = (start spc '/' name spc end)
> {
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// Starting a shortcode, close data (if previous shortcode is opening)
// If it's closing, then previous text can't be data.
if (shortcodes[c_sc-1].matching == 0) {
shortcodes[c_sc-1].data.start = data_mark-start;
shortcodes[c_sc-1].data.len = p-data_mark-1;
}
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};
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matched_shortcode = (shortcode any* closing_shortcode)
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@ {
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shortcodes[c_sc-1].matching = 1;
shortcodes[c_sc-1].len = p-start-shortcodes[c_sc-1].start + 1;
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if (
shortcodes[c_sc-1].name.len != shortcodes[c_sc].name.len ||
strncmp(
start + shortcodes[c_sc-1].name.start,
start + shortcodes[c_sc].name.start,
shortcodes[c_sc-1].name.len) !=0)
{
printf("Mismatched tags!\n");
str_copyb(&sc,start + shortcodes[c_sc-1].name.start, shortcodes[c_sc-1].name.len);
printf("opened: %s\n", sc.s);
str_copyb(&sc,start + shortcodes[c_sc].name.start, shortcodes[c_sc].name.len);
printf("closed: %s\n", sc.s);
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// Closing the wrong code
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// TODO error reporting
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return;
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}
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// Reuse this shortcode entry for next one
shortcodes[c_sc].name.start = 0;
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};
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main := (any* (shortcode | matched_shortcode))*;
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}%%
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struct chunk {
int start, len;
};
typedef struct chunk chunk;
struct shortcode {
int start;
int len;
chunk name;
chunk data;
char matching;
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chunk argnames[100];
chunk argvals[100];
int argcount;
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};
typedef struct shortcode shortcode;
void parse(char *input) {
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%%write data;
char *eof, *ts, *te = 0;
int cs, act = 0;
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char *start = input;
char *p = input;
char *pe = p + strlen(input);
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shortcode shortcodes[1000];
int c_sc = 0;
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int sc_start = 0;
int sc_end = 0;
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char *mark = p;
char *data_mark = p;
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str sc;
str_init(&sc);
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%% write init;
%% write exec;
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for (int i=0; shortcodes[i].name.start!=0; i++) {
str_copyb(&sc, start + shortcodes[i].name.start, shortcodes[i].name.len);
printf("sc_name: %s (%d)\n", sc.s, shortcodes[i].matching );
str_copyb(&sc, start + shortcodes[i].start, shortcodes[i].len);
printf("full_sc: %s\n", sc.s);
if (shortcodes[i].matching) {
str_copyb(&sc, start + shortcodes[i].data.start, shortcodes[i].data.len);
printf("sc_data: %s\n", sc.s);
}
}
}
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int main(int argc, char **argv) {
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parse(
"bbb{{% sarasa %}}ccc{{< c1 arg2 >}}foobar{{% /c1%}}aaa{{% sarasa %}}");
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// if (output == 0) {
// printf("parse error\n");
// return 1;
// }
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return 0;
}