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/*
* blogc: A blog compiler.
* Copyright (C) 2014-2020 Rafael G. Martins <rafael@rafaelmartins.eng.br>
*
* This program can be distributed under the terms of the BSD License.
* See the file LICENSE.
*/
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "../common/utils.h"
#include "pre-receive-parser.h"
typedef enum {
START_OLD = 1,
OLD,
START_NEW,
NEW,
START_REF,
REF
} input_state_t;
char*
bgr_pre_receive_parse(const char *input, size_t input_len)
{
input_state_t state = START_OLD;
size_t start = 0;
size_t start_new = 0;
for (size_t current = 0; current < input_len; current++) {
char c = input[current];
switch (state) {
case START_OLD:
start = current;
state = OLD;
break;
case OLD:
if (c != ' ')
break;
// no need to store old
state = START_NEW;
break;
case START_NEW:
start = current;
state = NEW;
break;
case NEW:
if (c != ' ')
break;
state = START_REF;
start_new = start;
break;
case START_REF:
start = current;
state = REF;
break;
case REF:
if (c != '\n')
break;
state = START_OLD;
// we just care about a ref (refs/heads/master), everything
// else is disposable :)
if ((current - start == 17) &&
(0 == strncmp("refs/heads/master", input + start, 17)))
{
return bc_strndup(input + start_new, start - 1 - start_new);
}
break;
}
}
return NULL;
}
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