devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

Better handling of strings in the WPS parser by detecting duplicates to avoid having two copies of the same string in the string buffer.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13295 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Nicolas Pennequin 2007-04-30 14:08:58 +00:00
parent 3a7760c3e2
commit 7e6af1532b
2 changed files with 40 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

45
apps/gui/wps_parser.c
View file

@ -653,7 +653,7 @@ static bool wps_parse(struct wps_data *data, const char *wps_bufptr)
if (!data || !wps_bufptr || !*wps_bufptr)
return false;
char *current_string = data->string_buffer;
char *stringbuf = data->string_buffer;
int stringbuf_used = 0;
int fail = 0;
line = 1;
@ -770,13 +770,9 @@ static bool wps_parse(struct wps_data *data, const char *wps_bufptr)
&& stringbuf_used < STRING_BUFFER_SIZE - 1)
{
data->tokens[data->num_tokens].type = WPS_TOKEN_STRING;
data->strings[data->num_strings] = current_string;
data->tokens[data->num_tokens].value.i = data->num_strings;
data->num_tokens++;
/* Copy the first byte */
*current_string++ = *(wps_bufptr - 1);
stringbuf_used++;
unsigned int len = 1;
const char *string_start = wps_bufptr - 1;
/* continue until we hit something that ends the string
or we run out of memory */
@ -786,15 +782,38 @@ static bool wps_parse(struct wps_data *data, const char *wps_bufptr)
*wps_bufptr != '|' && *wps_bufptr != '\n' &&
stringbuf_used < STRING_BUFFER_SIZE - 1)
{
*current_string++ = *wps_bufptr++;
stringbuf_used++;
wps_bufptr++;
len++;
}
/* null terminate the string */
*current_string++ = '\0';
stringbuf_used++;
/* look if we already have that string */
char **str;
int i;
bool found;
for (i = 0, str = data->strings, found = false;
i < data->num_strings
&& !(found = (strlen(*str) == len && strncmp(string_start, *str, len) == 0));
i++, str++) ;
/* If a matching string is found, found is true and i is the
index of the string. If not, found is false */
data->num_strings++;
if (!found)
{
/* new string */
strncpy(stringbuf, string_start, len);
data->strings[data->num_strings] = stringbuf;
stringbuf += len + 1;
stringbuf_used += len + 1;
data->tokens[data->num_tokens].value.i = data->num_strings;
data->num_strings++;
}
else
{
/* another ocurrence of an existing string */
data->tokens[data->num_tokens].value.i = i;
}
data->num_tokens++;
}
break;
}