void parse_config_file(char *map, size_t len)
{
int *end = (int *) (map + len);
/* start at +1, so that p can never be < map */
int *m = (int *) map + 1;
char *p, *q;
for (; m < end; m++) {
if (*m == INT_CONF) { p = (char *) m ; goto conf; }
if (*m == INT_ONFI) { p = (char *) m-1; goto conf; }
if (*m == INT_NFIG) { p = (char *) m-2; goto conf; }
if (*m == INT_FIG_) { p = (char *) m-3; goto conf; }
continue;
conf:
if (p > map + len - 7)
continue;
if (memcmp(p, "CONFIG_", 7))
continue;
for (q = p + 7; q < map + len; q++) {
if (!(isalnum(*q) || *q == '_'))
goto found;
}
continue;
found:
if (!memcmp(q - 7, "_MODULE", 7))
q -= 7;
if( (q-p-7) < 0 )
continue;
use_config(p+7, q-p-7);
}
}
void parse_config_file(char *map, size_t len)
{
/* modified for bbox */
char *end_4 = map + len - 4; /* 4 == length of "USE_" */
char *end_7 = map + len - 7;
char *p = map;
char *q;
int off;
for (; p < end_4; p++) {
if (p < end_7 && p[6] == '_') {
if (!memcmp(p, "CONFIG", 6)) goto conf7;
if (!memcmp(p, "ENABLE", 6)) goto conf7;
}
/* We have at least 5 chars: for() has
* "p < end-4", not "p <= end-4"
* therefore we don't need to check p <= end-5 here */
if (p[4] == '_')
if (!memcmp(p, "SKIP", 4)) goto conf5;
/* Ehhh, gcc is too stupid to just compare it as 32bit int */
if (p[0] == 'U')
if (!memcmp(p, "USE_", 4)) goto conf4;
continue;
conf4: off = 4;
conf5: off = 5;
conf7: off = 7;
p += off;
for (q = p; q < end_4+4; q++) {
if (!(isalnum(*q) || *q == '_'))
break;
}
use_config(p, q-p);
}
}
void parse_config_file(char *map, size_t len)
{
/* modified for bbox */
char *end_3 = map + len - 3; /* 3 == length of "IF_" */
char *end_7 = map + len - 7;
char *p = map;
char *q;
int off;
for (; p <= end_3; p++) {
/* Find next identifier's beginning */
if (!(isalnum(*p) || *p == '_'))
continue;
/* Check it */
if (p < end_7 && p[6] == '_') {
if (!memcmp(p, "CONFIG", 6)) goto conf7;
if (!memcmp(p, "ENABLE", 6)) goto conf7;
if (!memcmp(p, "IF_NOT", 6)) goto conf7;
}
/* we have at least 3 chars because of p <= end_3 */
/*if (!memcmp(p, "IF_", 3)) ...*/
if (p[0] == 'I' && p[1] == 'F' && p[2] == '_') {
off = 3;
goto conf;
}
/* This identifier is not interesting, skip it */
while (p <= end_3 && (isalnum(*p) || *p == '_'))
p++;
continue;
conf7: off = 7;
conf:
p += off;
for (q = p; q < end_3+3; q++) {
if (!(isalnum(*q) || *q == '_'))
break;
}
if (q != p) {
use_config(p, q-p);
}
}
}
/*
* The state machine looks for (approximately) these Perl regular expressions:
*
* m|\/\*.*?\*\/|
* m|\/\/.*|
* m|'.*?'|
* m|".*?"|
* m|#\s*include\s*"(.*?)"|
* m|#\s*include\s*<(.*?>"|
* m|#\s*(?define|undef)\s*CONFIG_(\w*)|
* m|(?!\w)CONFIG_|
*
* About 98% of the CPU time is spent here, and most of that is in
* the 'start' paragraph. Because the current characters are
* in a register, the start loop usually eats 4 or 8 characters
* per memory read. The MAX5 and MIN5 tests dispose of most
* input characters with 1 or 2 comparisons.
*/
void state_machine(const char * map, const char * end)
{
const char * next = map;
const char * map_dot;
unsigned long __buf = 0;
for (;;) {
start:
GETNEXT
__start:
if (current > MAX5('/','\'','"','#','C')) goto start;
if (current < MIN5('/','\'','"','#','C')) goto start;
CASE('/', slash);
CASE('\'', squote);
CASE('"', dquote);
CASE('#', pound);
CASE('C', cee);
goto start;
/* // */
slash_slash:
GETNEXT
CASE('\n', start);
NOTCASE('\\', slash_slash);
GETNEXT
goto slash_slash;
/* / */
slash:
GETNEXT
CASE('/', slash_slash);
NOTCASE('*', __start);
slash_star_dot_star:
GETNEXT
__slash_star_dot_star:
NOTCASE('*', slash_star_dot_star);
GETNEXT
NOTCASE('/', __slash_star_dot_star);
goto start;
/* '.*?' */
squote:
GETNEXT
CASE('\'', start);
NOTCASE('\\', squote);
GETNEXT
goto squote;
/* ".*?" */
dquote:
GETNEXT
CASE('"', start);
NOTCASE('\\', dquote);
GETNEXT
goto dquote;
/* #\s* */
pound:
GETNEXT
CASE(' ', pound);
CASE('\t', pound);
CASE('i', pound_i);
CASE('d', pound_d);
CASE('u', pound_u);
goto __start;
/* #\s*i */
pound_i:
GETNEXT NOTCASE('n', __start);
GETNEXT NOTCASE('c', __start);
GETNEXT NOTCASE('l', __start);
GETNEXT NOTCASE('u', __start);
GETNEXT NOTCASE('d', __start);
GETNEXT NOTCASE('e', __start);
goto pound_include;
/* #\s*include\s* */
pound_include:
GETNEXT
CASE(' ', pound_include);
CASE('\t', pound_include);
map_dot = next;
CASE('"', pound_include_dquote);
CASE('<', pound_include_langle);
goto __start;
/* #\s*include\s*"(.*)" */
pound_include_dquote:
GETNEXT
CASE('\n', start);
NOTCASE('"', pound_include_dquote);
handle_include(0, map_dot, next - map_dot - 1);
goto start;
/* #\s*include\s*<(.*)> */
pound_include_langle:
GETNEXT
CASE('\n', start);
NOTCASE('>', pound_include_langle);
handle_include(1, map_dot, next - map_dot - 1);
goto start;
/* #\s*d */
pound_d:
GETNEXT NOTCASE('e', __start);
GETNEXT NOTCASE('f', __start);
GETNEXT NOTCASE('i', __start);
GETNEXT NOTCASE('n', __start);
GETNEXT NOTCASE('e', __start);
goto pound_define_undef;
/* #\s*u */
pound_u:
GETNEXT NOTCASE('n', __start);
GETNEXT NOTCASE('d', __start);
GETNEXT NOTCASE('e', __start);
GETNEXT NOTCASE('f', __start);
goto pound_define_undef;
/*
* #\s*(define|undef)\s*CONFIG_(\w*)
*
* this does not define the word, because it could be inside another
* conditional (#if 0). But I do parse the word so that this instance
* does not count as a use. -- mec
*/
pound_define_undef:
GETNEXT
CASE(' ', pound_define_undef);
CASE('\t', pound_define_undef);
NOTCASE('C', __start);
GETNEXT NOTCASE('O', __start);
GETNEXT NOTCASE('N', __start);
GETNEXT NOTCASE('F', __start);
GETNEXT NOTCASE('I', __start);
GETNEXT NOTCASE('G', __start);
GETNEXT NOTCASE('_', __start);
map_dot = next;
pound_define_undef_CONFIG_word:
GETNEXT
if (isalnum(current) || current == '_')
goto pound_define_undef_CONFIG_word;
goto __start;
/* \<CONFIG_(\w*) */
cee:
if (next >= map+2 && (isalnum(next[-2]) || next[-2] == '_'))
goto start;
GETNEXT NOTCASE('O', __start);
GETNEXT NOTCASE('N', __start);
GETNEXT NOTCASE('F', __start);
GETNEXT NOTCASE('I', __start);
GETNEXT NOTCASE('G', __start);
GETNEXT NOTCASE('_', __start);
map_dot = next;
cee_CONFIG_word:
GETNEXT
if (isalnum(current) || current == '_')
goto cee_CONFIG_word;
use_config(map_dot, next - map_dot - 1);
goto __start;
}
}
static void parse_config_file(const char *map, size_t len)
{
const int *end = (const int *) (map + len);
/* start at +1, so that p can never be < map */
const int *m = (const int *) map + 1;
const char *p, *q;
char tmp_buf[256] = "SPL_"; /* hack for U-Boot */
for (; m < end; m++) {
if (*m == INT_CONF) { p = (char *) m ; goto conf; }
if (*m == INT_ONFI) { p = (char *) m-1; goto conf; }
if (*m == INT_NFIG) { p = (char *) m-2; goto conf; }
if (*m == INT_FIG_) { p = (char *) m-3; goto conf; }
continue;
conf:
if (p > map + len - 7)
continue;
if (memcmp(p, "CONFIG_", 7))
continue;
p += 7;
for (q = p; q < map + len; q++) {
if (!(isalnum(*q) || *q == '_'))
goto found;
}
continue;
found:
if (!memcmp(q - 7, "_MODULE", 7))
q -= 7;
if (q - p < 0)
continue;
/*
* U-Boot also handles
* CONFIG_IS_ENABLED(...)
* CONFIG_IS_BUILTIN(...)
* CONFIG_IS_MODULE(...)
* CONFIG_VAL(...)
*/
if ((q - p == 10 && !memcmp(p, "IS_ENABLED(", 11)) ||
(q - p == 10 && !memcmp(p, "IS_BUILTIN(", 11)) ||
(q - p == 9 && !memcmp(p, "IS_MODULE(", 10)) ||
(q - p == 3 && !memcmp(p, "VAL(", 4))) {
p = q + 1;
for (q = p; q < map + len; q++)
if (*q == ')')
goto found2;
continue;
found2:
if (is_spl_build) {
memcpy(tmp_buf + 4, p, q - p);
q = tmp_buf + 4 + (q - p);
p = tmp_buf;
}
}
/* end U-Boot hack */
use_config(p, q - p);
}
}