Factor out different {clear,get}filenames definitions into fnlist_t + functions.

Don't actually replace the instances in the code now.
Additions in common.h:
 - fnlist_t, which combines CACHE1D_FIND_REC *finddirs, *findfiles and
   int32_t numdirs, numfiles
 - the FNLIST_INITIALIZER macro, which MUST be used for automatic variables
 - fnlist_clearnames, fnlist_getnames functions
 - G_LoadGroupsInDir, G_DoAutoload, two often-occurring uses of these

git-svn-id: https://svn.eduke32.com/eduke32@2555 1a8010ca-5511-0410-912e-c29ae57300e0

polymer/eduke32/build/include/common.h

@@ -8,6 +8,7 @@
 #define EDUKE32_COMMON_H_
 
 #include "scriptfile.h"
+#include "cache1d.h"
 
 
 //// TYPES
@@ -24,6 +25,15 @@ typedef struct
 }
 tokenlist;
 
+typedef struct
+{
+    CACHE1D_FIND_REC *finddirs, *findfiles;
+    int32_t numdirs, numfiles;
+}
+fnlist_t;
+
+#define FNLIST_INITIALIZER { NULL, NULL, 0, 0 }
+
 enum
 {
     T_EOF = -2,
@@ -43,4 +53,11 @@ int32_t getatoken(scriptfile *sf, const tokenlist *tl, int32_t ntokens);
 
 int32_t check_file_exist(const char *fn);
 
+void fnlist_clearnames(fnlist_t *fnl);
+int32_t fnlist_getnames(fnlist_t *fnl, const char *dirname, const char *pattern,
+                        int32_t dirflags, int32_t fileflags);
+
+void G_LoadGroupsInDir(const char *dirname);
+void G_DoAutoload(const char *dirname);
+
 #endif

polymer/eduke32/source/common.c

@@ -97,3 +97,73 @@ int32_t check_file_exist(const char *fn)
 
     return 0;
 }
+
+
+//// FILE NAME / DIRECTORY LISTS ////
+void fnlist_clearnames(fnlist_t *fnl)
+{
+    klistfree(fnl->finddirs);
+    klistfree(fnl->findfiles);
+
+    fnl->finddirs = fnl->findfiles = NULL;
+    fnl->numfiles = fnl->numdirs = 0;
+}
+
+// dirflags, fileflags:
+//  -1 means "don't get dirs/files",
+//  otherwise ORed to flags for respective klistpath
+int32_t fnlist_getnames(fnlist_t *fnl, const char *dirname, const char *pattern,
+                        int32_t dirflags, int32_t fileflags)
+{
+    CACHE1D_FIND_REC *r;
+
+    fnlist_clearnames(fnl);
+
+    if (dirflags != -1)
+        fnl->finddirs = klistpath(dirname, "*", CACHE1D_FIND_DIR|dirflags);
+    if (fileflags != -1)
+        fnl->findfiles = klistpath(dirname, pattern, CACHE1D_FIND_FILE|fileflags);
+
+    for (r=fnl->finddirs; r; r=r->next)
+        fnl->numdirs++;
+    for (r=fnl->findfiles; r; r=r->next)
+        fnl->numfiles++;
+
+    return(0);
+}
+
+
+// loads all group (grp, zip, pk3) files in the given directory
+void G_LoadGroupsInDir(const char *dirname)
+{
+    static const char *extensions[3] = { "*.grp", "*.zip", "*.pk3" };
+
+    char buf[BMAX_PATH];
+    int32_t i;
+
+    fnlist_t fnlist = FNLIST_INITIALIZER;
+
+    for (i=0; i<3; i++)
+    {
+        CACHE1D_FIND_REC *rec;
+
+        fnlist_getnames(&fnlist, dirname, extensions[i], -1, 0);
+
+        for (rec=fnlist.findfiles; rec; rec=rec->next)
+        {
+            Bsnprintf(buf, sizeof(buf), "%s/%s", dirname, rec->name);
+            initprintf("Using group file \"%s\".\n", buf);
+            initgroupfile(buf);
+        }
+
+        fnlist_clearnames(&fnlist);
+    }
+}
+
+void G_DoAutoload(const char *dirname)
+{
+    char buf[BMAX_PATH];
+
+    Bsnprintf(buf, sizeof(buf), "autoload/%s", dirname);
+    G_LoadGroupsInDir(buf);
+}