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Move VDF parsing to engine

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git-svn-id: https://svn.eduke32.com/eduke32@8267 1a8010ca-5511-0410-912e-c29ae57300e0

# Conflicts:
#	source/build/include/common.h
#	source/duke3d/src/common.cpp
This commit is contained in:
hendricks266 2019-10-30 05:51:34 +00:00 committed by Christoph Oelckers
parent de3215bcab
commit 9b21fe0c28
2 changed files with 170 additions and 0 deletions
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3
source/build/include/common.h
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@ -140,4 +140,7 @@ void COMMON_clearbackground(int32_t numcols, int32_t numrows);
#define EDUKE32_TMRTIC t[ti++]=timerGetTicks()
#define EDUKE32_TMRPRN do { int ii=0; fprintf(stderr,"%s: ",tmrstr); for (ii=1; ii<ti; ii++) fprintf(stderr,"%d ", t[ii]-t[ii-1]); fprintf(stderr,"\n"); } while (0)
using SteamPathParseFunc = void(*)(const char *);
void Paths_ParseSteamKeyValuesForPaths(const char *vdf, SteamPathParseFunc func);
#endif

167
source/build/src/common.cpp
View file

@ -288,3 +288,170 @@ void COMMON_clearbackground(int numcols, int numrows)
{
COMMON_doclearbackground(numcols, 8 * numrows + 8);
}
// A bare-bones "parser" for Valve's KeyValues VDF format.
// There is no guarantee this will function properly with ill-formed files.
static void KeyValues_SkipWhitespace(char **vdfbuf, char * const vdfbufend)
{
while (((*vdfbuf)[0] == ' ' || (*vdfbuf)[0] == '\n' || (*vdfbuf)[0] == '\r' || (*vdfbuf)[0] == '\t' || (*vdfbuf)[0] == '\0') && *vdfbuf < vdfbufend)
(*vdfbuf)++;
// comments
if ((*vdfbuf) + 2 < vdfbufend && (*vdfbuf)[0] == '/' && (*vdfbuf)[1] == '/')
{
while ((*vdfbuf)[0] != '\n' && (*vdfbuf)[0] != '\r' && *vdfbuf < vdfbufend)
(*vdfbuf)++;
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
}
}
static void KeyValues_SkipToEndOfQuotedToken(char **vdfbuf, char * const vdfbufend)
{
(*vdfbuf)++;
while ((*vdfbuf)[0] != '\"' && (*vdfbuf)[-1] != '\\' && *vdfbuf < vdfbufend)
(*vdfbuf)++;
}
static void KeyValues_SkipToEndOfUnquotedToken(char **vdfbuf, char * const vdfbufend)
{
while ((*vdfbuf)[0] != ' ' && (*vdfbuf)[0] != '\n' && (*vdfbuf)[0] != '\r' && (*vdfbuf)[0] != '\t' && (*vdfbuf)[0] != '\0' && *vdfbuf < vdfbufend)
(*vdfbuf)++;
}
static void KeyValues_SkipNextWhatever(char **vdfbuf, char * const vdfbufend)
{
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
if (*vdfbuf == vdfbufend)
return;
if ((*vdfbuf)[0] == '{')
{
(*vdfbuf)++;
do
{
KeyValues_SkipNextWhatever(vdfbuf, vdfbufend);
}
while ((*vdfbuf)[0] != '}');
(*vdfbuf)++;
}
else if ((*vdfbuf)[0] == '\"')
KeyValues_SkipToEndOfQuotedToken(vdfbuf, vdfbufend);
else if ((*vdfbuf)[0] != '}')
KeyValues_SkipToEndOfUnquotedToken(vdfbuf, vdfbufend);
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
}
static char* KeyValues_NormalizeToken(char **vdfbuf, char * const vdfbufend)
{
char *token = *vdfbuf;
if ((*vdfbuf)[0] == '\"' && *vdfbuf < vdfbufend)
{
token++;
KeyValues_SkipToEndOfQuotedToken(vdfbuf, vdfbufend);
(*vdfbuf)[0] = '\0';
// account for escape sequences
char *writeseeker = token, *readseeker = token;
while (readseeker <= *vdfbuf)
{
if (readseeker[0] == '\\')
readseeker++;
writeseeker[0] = readseeker[0];
writeseeker++;
readseeker++;
}
return token;
}
KeyValues_SkipToEndOfUnquotedToken(vdfbuf, vdfbufend);
(*vdfbuf)[0] = '\0';
return token;
}
static void KeyValues_FindKey(char **vdfbuf, char * const vdfbufend, const char *token)
{
char *ParentKey = KeyValues_NormalizeToken(vdfbuf, vdfbufend);
if (token != NULL) // pass in NULL to find the next key instead of a specific one
while (Bstrcmp(ParentKey, token) != 0 && *vdfbuf < vdfbufend)
{
KeyValues_SkipNextWhatever(vdfbuf, vdfbufend);
ParentKey = KeyValues_NormalizeToken(vdfbuf, vdfbufend);
}
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
}
static int32_t KeyValues_FindParentKey(char **vdfbuf, char * const vdfbufend, const char *token)
{
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
// end of scope
if ((*vdfbuf)[0] == '}')
return 0;
KeyValues_FindKey(vdfbuf, vdfbufend, token);
// ignore the wrong type
while ((*vdfbuf)[0] != '{' && *vdfbuf < vdfbufend)
{
KeyValues_SkipNextWhatever(vdfbuf, vdfbufend);
KeyValues_FindKey(vdfbuf, vdfbufend, token);
}
if (*vdfbuf == vdfbufend)
return 0;
return 1;
}
static char* KeyValues_FindKeyValue(char **vdfbuf, char * const vdfbufend, const char *token)
{
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
// end of scope
if ((*vdfbuf)[0] == '}')
return NULL;
KeyValues_FindKey(vdfbuf, vdfbufend, token);
// ignore the wrong type
while ((*vdfbuf)[0] == '{' && *vdfbuf < vdfbufend)
{
KeyValues_SkipNextWhatever(vdfbuf, vdfbufend);
KeyValues_FindKey(vdfbuf, vdfbufend, token);
}
KeyValues_SkipWhitespace(vdfbuf, vdfbufend);
if (*vdfbuf == vdfbufend)
return NULL;
return KeyValues_NormalizeToken(vdfbuf, vdfbufend);
}
void Paths_ParseSteamKeyValuesForPaths(const char *vdf, SteamPathParseFunc func)
{
buildvfs_fd fd = buildvfs_open_read(vdf);
int32_t size = buildvfs_length(fd);
char *vdfbufstart, *vdfbuf, *vdfbufend;
if (size <= 0)
return;
vdfbufstart = vdfbuf = (char*)Xmalloc(size);
size = (int32_t)buildvfs_read(fd, vdfbuf, size);
buildvfs_close(fd);
vdfbufend = vdfbuf + size;
if (KeyValues_FindParentKey(&vdfbuf, vdfbufend, "LibraryFolders"))
{
char *result;
vdfbuf++;
while ((result = KeyValues_FindKeyValue(&vdfbuf, vdfbufend, NULL)) != NULL)
func(result);
}
Xfree(vdfbufstart);
}