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cache1d: Add support for loading SSI files.

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git-svn-id: https://svn.eduke32.com/eduke32@5060 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
hendricks266 2015-03-23 06:27:49 +00:00
parent 8a2b19dd50
commit 2f0f38b6e6
1 changed files with 104 additions and 1 deletions
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105
polymer/eduke32/build/src/cache1d.c
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@ -693,7 +693,7 @@ static void kclose_grp(int32_t handle);
int32_t initgroupfile(const char *filename)
{
char buf[16];
char buf[70];
// translate all backslashes (0x5c) to forward slashes (0x2f)
toupperlookup[0x5c] = 0x2f;
@ -756,6 +756,109 @@ int32_t initgroupfile(const char *filename)
numgroupfiles++;
return 0;
}
klseek_grp(numgroupfiles, 0, BSEEK_SET);
// check if SSI
// this performs several checks because there is no "SSI" magic
int32_t version;
kread_grp(numgroupfiles, &version, 4);
version = B_LITTLE32(version);
while (version == 1 || version == 2) // if
{
char zerobuf[70];
Bmemset(zerobuf, 0, 70);
int32_t numfiles;
kread_grp(numgroupfiles, &numfiles, 4);
numfiles = B_LITTLE32(numfiles);
uint8_t temp, temp2;
// get the string length
kread_grp(numgroupfiles, &temp, 1);
if (temp > 31) // 32 bytes allocated for the string
break;
// seek to the end of the string
klseek_grp(numgroupfiles, temp, BSEEK_CUR);
// verify everything remaining is a null terminator
temp = 32 - temp;
kread_grp(numgroupfiles, buf, temp);
if (Bmemcmp(buf, zerobuf, temp))
break;
if (version == 2)
{
// get the string length
kread_grp(numgroupfiles, &temp, 1);
if (temp > 11) // 12 bytes allocated for the string
break;
// seek to the end of the string
klseek_grp(numgroupfiles, temp, BSEEK_CUR);
// verify everything remaining is a null terminator
temp = 12 - temp;
kread_grp(numgroupfiles, buf, temp);
if (Bmemcmp(buf, zerobuf, temp))
break;
}
temp2 = 0;
for (uint8_t i=0;i<3;i++)
{
// get the string length
kread_grp(numgroupfiles, &temp, 1);
if (temp > 70) // 70 bytes allocated for the string
{
temp2 = 1;
break;
}
// seek to the end of the string
klseek_grp(numgroupfiles, temp, BSEEK_CUR);
// verify everything remaining is a null terminator
temp = 70 - temp;
if (temp == 0)
continue;
kread_grp(numgroupfiles, buf, temp);
temp2 |= Bmemcmp(buf, zerobuf, temp);
}
if (temp2)
break;
// Passed all the tests: read data.
gnumfiles[numgroupfiles] = numfiles;
gfilelist[numgroupfiles] = (char *)Xmalloc(gnumfiles[numgroupfiles]<<4);
gfileoffs[numgroupfiles] = (int32_t *)Xmalloc((gnumfiles[numgroupfiles]+1)<<2);
int32_t j = (version == 2 ? 267 : 254) + (numfiles * 121), k;
for (int32_t i = 0; i < numfiles; i++)
{
// get the string length
kread_grp(numgroupfiles, &temp, 1);
if (temp > 12)
temp = 12;
// read the file name
kread_grp(numgroupfiles, &gfilelist[numgroupfiles][i<<4], temp);
gfilelist[numgroupfiles][(i<<4)+temp] = 0;
// skip to the end of the 12 bytes
klseek_grp(numgroupfiles, 12-temp, BSEEK_CUR);
// get the file size
kread_grp(numgroupfiles, &k, 4);
k = B_LITTLE32(k);
// record the offset of the file in the SSI
gfileoffs[numgroupfiles][i] = j;
j += k;
// skip unknown data
klseek_grp(numgroupfiles, 104, BSEEK_CUR);
}
gfileoffs[numgroupfiles][gnumfiles[numgroupfiles]] = j;
numgroupfiles++;
return 0;
}
kclose_grp(numgroupfiles);
return -1;