start the config system, add the config file parser

1 files changed, 95 insertions, 0 deletions

diff --git a/openbox/cparse.l b/openbox/cparse.l
new file mode 100644
index 00000000..5e4b6d3e
--- /dev/null
+++ b/openbox/cparse.l
@@ -0,0 +1,95 @@
+%{
+#include <glib.h>
+#include "config.h"
+
+static int yylineno = 1;
+static gboolean haserror = FALSE;
+static ConfigEntry entry = { NULL, -1 };
+
+static void stringvalue();
+static void numbervalue();
+static void identifier();
+static void newline();
+static int yywrap();
+%}
+
+number [0-9]+
+string \"[^"\n]*\"
+identifier [a-zA-Z][a-zA-Z0-9_]*
+white [ \t]*
+assign {white}={white}
+
+%%
+
+{string}/{white}\n stringvalue();
+{number}/{white}\n numbervalue();
+^{identifier}/{assign} identifier();
+\n newline();
+=
+[ \t]
+. haserror = TRUE;
+
+%%
+
+static void stringvalue()
+{
+    if (!haserror && entry.name != NULL && (signed)entry.type < 0) {
+        entry.type = Config_String;
+        entry.value.string = g_strdup(yytext+1); /* drop the left quote */
+        if (entry.value.string[yyleng-2] != '"')
+            printf("warning: improperly terminated string on line %d\n",
+                   yylineno);
+        else
+            entry.value.string[yyleng-2] = '\0';
+    } else
+        haserror = TRUE;
+}
+
+static void numbervalue()
+{
+    if (!haserror && entry.name != NULL && (signed)entry.type < 0) {
+        entry.type = Config_Integer;
+        entry.value.integer = atoi(yytext);
+    } else
+        haserror = TRUE;
+}
+
+static void identifier()
+{
+    g_print("identifier: %s\n", yytext);
+    entry.name = g_strdup(yytext);
+    entry.type = -1;
+}
+
+static void newline()
+{
+    if (!haserror && entry.name != NULL && (signed)entry.type >= 0) {
+        if (!config_set(entry.name, entry.type, entry.value))
+            g_warning("Invalid option in config file: '%s'\n", entry.name);
+    } else {
+        printf("Parser error in config file on line %d\n", yylineno);
+    }
+    g_free(entry.name);
+    entry.name = NULL;
+    if (entry.type == Config_String)
+        g_free(entry.value.string);
+    entry.type = -1;
+
+    haserror = FALSE;
+    ++yylineno;
+}
+
+static int yywrap()
+{
+    g_free(entry.name);
+    entry.name = NULL;
+    if (entry.type == Config_String)
+        g_free(entry.value.string);
+    return 1;
+}
+
+void cparse_go(FILE *file)
+{
+    yyin = file;
+    yylex();
+}