emileclarkb/hammer
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #24 from pesco/base64-example

Browse source 
Base64 example
This commit is contained in:
Meredith L. Patterson 2013-01-09 08:07:19 -08:00
commit a2840a6aa7
1 changed files with 7 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

15
examples/base64.c
View file

@ -14,16 +14,15 @@ void init_parser(void)
const HParser *equals = h_ch('=');
const HParser *bsfdig = h_choice(alpha, digit, plus, slash, NULL);
const HParser *bsfdig_4bit = h_choice(
h_ch('A'), h_ch('E'), h_ch('I'), h_ch('M'), h_ch('Q'), h_ch('U'),
h_ch('Y'), h_ch('c'), h_ch('g'), h_ch('k'), h_ch('o'), h_ch('s'),
h_ch('w'), h_ch('0'), h_ch('4'), h_ch('8'), NULL);
const HParser *bsfdig_2bit = h_choice(h_ch('A'), h_ch('Q'), h_ch('g'), h_ch('w'), NULL);
const HParser *bsfdig_4bit = h_in((uint8_t *)"AEIMQUYcgkosw048", 16);
const HParser *bsfdig_2bit = h_in((uint8_t *)"AQgw", 4);
const HParser *base64_3 = h_repeat_n(bsfdig, 4);
const HParser *base64_2 = h_sequence(bsfdig, bsfdig, bsfdig_4bit, equals, NULL);
const HParser *base64_1 = h_sequence(bsfdig, bsfdig_2bit, equals, equals, NULL);
const HParser *base64 = h_choice(base64_2, base64_1, NULL);
// why does this parse "A=="?!
// why does this parse "aaA=" but not "aA=="?!
const HParser *base64 = h_sequence(h_many(base64_3),
h_optional(h_choice(base64_2,
base64_1, NULL)),
NULL);
document = base64;
}