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Dynamically resize buffer as needed

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svn path=/trunk/; revision=12350
This commit is contained in:
Gé van Geldorp 2004-12-26 23:31:00 +00:00
parent 8bbd20efdc
commit e4514c3fed
1 changed files with 21 additions and 12 deletions
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19
reactos/apps/utils/pnpdump/pnpdump.c
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@ -706,7 +706,7 @@ int main (int argc, char *argv[])
} }
/* Allocate buffer */ /* Allocate buffer */
dwSize = 1024; dwSize = 2048;
lpBuffer = malloc(dwSize); lpBuffer = malloc(dwSize);
if (lpBuffer == NULL) if (lpBuffer == NULL)
{ {
@ -715,19 +715,28 @@ int main (int argc, char *argv[])
return 0; return 0;
} }
do
{
lError = RegQueryValueEx(hPnpKey, lError = RegQueryValueEx(hPnpKey,
"Configuration Data", "Configuration Data",
NULL, NULL,
&dwType, &dwType,
(LPBYTE)lpBuffer, (LPBYTE)lpBuffer,
&dwSize); &dwSize);
if (lError != ERROR_SUCCESS)
{
if (lError == ERROR_MORE_DATA) if (lError == ERROR_MORE_DATA)
{ {
printf("Need to resize buffer to %lu\n", dwSize); lpBuffer = realloc(lpBuffer, dwSize);
if (lpBuffer == NULL)
{
printf("Error: realloc() of %u bytes failed\n", (unsigned) dwSize);
RegCloseKey(hPnpKey);
return 0;
} }
}
}
while (lError == ERROR_MORE_DATA);
if (lError != ERROR_SUCCESS)
{
printf("Failed to read 'Configuration Data' value\n"); printf("Failed to read 'Configuration Data' value\n");
free(lpBuffer); free(lpBuffer);
RegCloseKey(hPnpKey); RegCloseKey(hPnpKey);