Move function for configfile parsing into configfile.[ch]

[ps-cgit] / configfile.c

diff --git a/configfile.c b/configfile.c
new file mode 100644 (file)
index 0000000..4908058
--- /dev/null
+++ b/configfile.c
@@ -0,0 +1,87 @@
+/* configfile.c: parsing of config files
+ *
+ * Copyright (C) 2008 Lars Hjemli
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include "configfile.h"
+
+int next_char(FILE *f)
+{
+       int c = fgetc(f);
+       if (c=='\r') {
+               c = fgetc(f);
+               if (c!='\n') {
+                       ungetc(c, f);
+                       c = '\r';
+               }
+       }
+       return c;
+}
+
+void skip_line(FILE *f)
+{
+       int c;
+
+       while((c=next_char(f)) && c!='\n' && c!=EOF)
+               ;
+}
+
+int read_config_line(FILE *f, char *line, const char **value, int bufsize)
+{
+       int i = 0, isname = 0;
+
+       *value = NULL;
+       while(i<bufsize-1) {
+               int c = next_char(f);
+               if (!isname && (c=='#' || c==';')) {
+                       skip_line(f);
+                       continue;
+               }
+               if (!isname && isspace(c))
+                       continue;
+
+               if (c=='=' && !*value) {
+                       line[i] = 0;
+                       *value = &line[i+1];
+               } else if (c=='\n' && !isname) {
+                       i = 0;
+                       continue;
+               } else if (c=='\n' || c==EOF) {
+                       line[i] = 0;
+                       break;
+               } else {
+                       line[i]=c;
+               }
+               isname = 1;
+               i++;
+       }
+       line[i+1] = 0;
+       return i;
+}
+
+int parse_configfile(const char *filename, configfile_value_fn fn)
+{
+       static int nesting;
+       int len;
+       char line[256];
+       const char *value;
+       FILE *f;
+
+       /* cancel deeply nested include-commands */
+       if (nesting > 8)
+               return -1;
+       if (!(f = fopen(filename, "r")))
+               return -1;
+       nesting++;
+       while((len = read_config_line(f, line, &value, sizeof(line))) > 0)
+               fn(line, value);
+       nesting--;
+       fclose(f);
+       return 0;
+}
+