From: Tangles <andyrthomson@gmail.com>
Date: Wed, 22 Jan 2020 12:06:51 +0000 (+1100)
Subject: userprefs - getpref, setptref, variable expansion in TYPE_VALUE fields in config
X-Git-Tag: v1.6.1-roc-dev~38
X-Git-Url: https://skyeroc.xyz/gitweb/?a=commitdiff_plain;h=955d8973d9b3feb64b482511592dd8c1b9872910;p=dgamelaunch

userprefs - getpref, setptref, variable expansion in TYPE_VALUE fields in config
---

diff --git a/config.l b/config.l
index 81a188c..7d5d6de 100644
--- a/config.l
+++ b/config.l
@@ -21,6 +21,7 @@ VALUE		\"[^"]*\"
 MALSTRING	\"[^\"\n]*\n
 COMMENT		^[\t ]*#.*
 WHITE		[\t ]*
+UPREF           \$\{[a-zA-Z][a-zA-Z0-9]*(:{VALUE})?\}
 
 %%
 
@@ -47,6 +48,11 @@ WHITE		[\t ]*
   return TYPE_MALSTRING; 
 }
 
+{UPREF} {
+  yylval.s = strdup(yytext); /* leave as is - we will parse manually at 'run-time'. */
+  return TYPE_VALUE;
+}
+
 {WHITE}		{ }
 {COMMENT}	{ }
 
@@ -58,6 +64,7 @@ WHITE		[\t ]*
 "}"		{ return '}'; }
 "("		{ return '('; }
 ")"		{ return ')'; }
+"$"             { return '$'; }
 "shed_user"	{ return TYPE_SUSER; }
 "shed_group"	{ return TYPE_SGROUP; }
 "shed_uid"	{ return TYPE_SUID; }
diff --git a/dgamelaunch.c b/dgamelaunch.c
index 9c381c8..ef9b0f6 100644
--- a/dgamelaunch.c
+++ b/dgamelaunch.c
@@ -2201,6 +2201,36 @@ writeprefs ()
     return prefcount;
 }
 
+const char *
+getpref(char *key, char *fallback)
+{
+    struct userpref *cpref;
+    for (cpref = userprefs; cpref; cpref = cpref->npref)
+        if (!strcmp(cpref->name, key))
+            return (const char *)cpref->value;
+    return fallback ? (const char *)fallback : "";
+}
+
+int
+setpref(char *key, char *val)
+{
+    struct userpref *cpref;
+    for (cpref = userprefs; cpref; cpref = cpref->npref)
+        if (!strcmp(cpref->name, key)) {
+            free(cpref->value);
+            cpref->value = strdup(val);
+            return TRUE;
+        }
+    /* prepend to list to avoid ugly double-indirection */
+    cpref = (struct userpref *)malloc(sizeof(struct userpref));
+    if (!cpref) return FALSE;
+    cpref->name = strdup(key);
+    cpref->value = strdup(val);
+    cpref->npref = userprefs;
+    userprefs = cpref;
+    return TRUE;
+}
+
 /* ************************************************************* */
 
 int
diff --git a/dgamelaunch.h b/dgamelaunch.h
index a45cd85..a00d8a6 100644
--- a/dgamelaunch.h
+++ b/dgamelaunch.h
@@ -357,6 +357,8 @@ extern void graceful_exit(int status);
 extern int purge_stale_locks(int game);
 extern int readprefs(void);
 extern int writeprefs(void);
+extern const char *getpref(char *key, char *fallback);
+extern int setpref(char *key, char *val);
 /*extern int menuloop(void);*/
 extern void ttyrec_getpty(void);
 #ifndef HAVE_SETENV
diff --git a/dgl-common.c b/dgl-common.c
index f81bdda..0033622 100644
--- a/dgl-common.c
+++ b/dgl-common.c
@@ -119,14 +119,17 @@ dgl_find_menu(char *menuname)
  * %t == ttyrec file (full path&name) of the last game played.
  * %w == 'watched' player (string; from 'plrname', or 'me' if 'plrname' is null)
  * %N, %W, %L (char; first character of their lowercase counterparts)
+ * ${varname[:default]} expands to userpref value of varname if defined, else
+ * default if specified.
  */
 char *
 dgl_format_str(int game, struct dg_user *me, char *str, char *plrname)
 {
     static char buf[1024];
-    char *f, *p, *end;
+    char *f, *p, *end, *varname = NULL, *fallback = NULL;
     int ispercent = 0;
     int isbackslash = 0;
+    int isdollar = 0;
 
     if (!str) return NULL;
 
@@ -136,7 +139,18 @@ dgl_format_str(int game, struct dg_user *me, char *str, char *plrname)
     end = buf + sizeof(buf) - 10;
 
     while (*f) {
-	if (ispercent) {
+        if (varname || fallback) {
+           if (*f == ':') {
+               fallback = f+1;
+               *f = '\0';
+           }
+           if (*f == '}') {
+               *f = '\0';
+               snprintf(p, end + 1 - p, "%s", getpref(varname, fallback));
+               for (; *p; p++);
+               varname = fallback = NULL;
+           }
+	} else if (ispercent) {
 	    switch (*f) {
 	    case 'u':
 		snprintf (p, end + 1 - p, "%d", globalconfig.shed_uid);
@@ -231,7 +245,17 @@ dgl_format_str(int game, struct dg_user *me, char *str, char *plrname)
 		ispercent = 1;
 	    } else if (*f == '\\') {
 		isbackslash = 1;
+            } else if (isdollar && *f == '{') {
+               varname = f+1;
+               fallback = NULL;
+               isdollar = 0;
+            } else if (*f == '$') {
+                isdollar = 1;
 	    } else {
+                if (isdollar) { /* not part of a variable/pref, so copy the literal $ */
+                    isdollar = 0;
+                    *p++ = '$';
+                }
 		*p = *f;
 		if (p < end)
 		    p++;
@@ -357,7 +381,7 @@ dgl_exec_cmdqueue_w(struct dg_cmdpart *queue, int game, struct dg_user *me, char
         case DGLCMD_SETPREFPATH:
             if (loggedin && p1) {
                 free(userpref_path);
-                userpref_path = strdup(dgl_format_str(NULL, me, p1, playername));
+                userpref_path = strdup(dgl_format_str(-1, me, p1, playername));
             }
             break;
         case DGLCMD_READPREFS:
@@ -811,13 +835,13 @@ populate_games (int xgame, int *l, struct dg_user *me)
 graceful_exit (int status)
 {
   /*FILE *fp;
-     if (status != 1) 
-     { 
+     if (status != 1)
+     {
      fp = fopen ("/crash.log", "a");
      char buf[100];
      sprintf (buf, "graceful_exit called with status %d", status);
      fputs (buf, fp);
-     } 
+     }
      This doesn't work. Ever.
    */
   endwin();