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httpd: speed up httpd.conf at the cost of 49 bytes of code

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2009-05-02 00:50:38 +02:00
parent 9c35a1cfb6
commit 48a29defca
1 changed files with 20 additions and 8 deletions
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28
networking/httpd.c
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@ -530,27 +530,39 @@ static void parse_conf(const char *path, int flag)
while (fgets(buf, sizeof(buf), f) != NULL) { while (fgets(buf, sizeof(buf), f) != NULL) {
unsigned strlen_buf; unsigned strlen_buf;
unsigned char ch; unsigned char ch;
char *after_colon = NULL; char *after_colon;
{ /* remove all whitespace, and # comments */ { /* remove all whitespace, and # comments */
char *p, *p0; char *p, *p0;
p = p0 = buf; p0 = buf;
while ((ch = *p0++) != '\0' && ch != '#') { /* skip non-whitespace beginning. Often the whole line
if (!isspace(ch)) { * is non-whitespace. We want this case to work fast,
* without needless copying, therefore we don't merge
* this operation into next while loop. */
while ((ch = *p0) != '\0' && ch != '\n' && ch != '#'
&& ch != ' ' && ch != '\t'
) {
p0++;
}
p = p0;
/* if we enter this loop, we have some whitespace.
* discard it */
while (ch != '\0' && ch != '\n' && ch != '#') {
if (ch != ' ' && ch != '\t') {
*p++ = ch; *p++ = ch;
if (ch == ':' && after_colon == NULL)
after_colon = p;
} }
ch = *++p0;
} }
*p = '\0'; *p = '\0';
strlen_buf = p - buf; strlen_buf = p - buf;
if (strlen_buf == 0) if (strlen_buf == 0)
continue; continue; /* empty line */
} }
after_colon = strchr(buf, ':');
/* strange line? */ /* strange line? */
if (after_colon == NULL || *after_colon == '\0') if (after_colon == NULL || *++after_colon == '\0')
goto config_error; goto config_error;
ch = (buf[0] & ~0x20); /* toupper if it's a letter */ ch = (buf[0] & ~0x20); /* toupper if it's a letter */