1 files changed, 130 insertions, 0 deletions
diff --git a/control.c b/control.c
new file mode 100644
index 0000000..b655352
--- /dev/null
+++ b/control.c
@@ -0,0 +1,130 @@
+#include "readwrite.h"
+#include "open.h"
+#include "getln.h"
+#include "stralloc.h"
+#include "substdio.h"
+#include "error.h"
+#include "control.h"
+#include "alloc.h"
+#include "scan.h"
+
+static char inbuf[64];
+static stralloc line = {0};
+static stralloc me = {0};
+static int meok = 0;
+
+static void striptrailingwhitespace(sa)
+stralloc *sa;
+{
+ while (sa->len > 0)
+   switch(sa->s[sa->len - 1])
+    {
+     case '\n': case ' ': case '\t':
+       --sa->len;
+       break;
+     default:
+       return;
+    }
+}
+
+int control_init()
+{
+ int r;
+ r = control_readline(&me,"control/me");
+ if (r == 1) meok = 1;
+ return r;
+}
+
+int control_rldef(sa,fn,flagme,def)
+stralloc *sa;
+char *fn;
+int flagme;
+char *def;
+{
+ int r;
+ r = control_readline(sa,fn);
+ if (r) return r;
+ if (flagme) if (meok) return stralloc_copy(sa,&me) ? 1 : -1;
+ if (def) return stralloc_copys(sa,def) ? 1 : -1;
+ return r;
+}
+
+int control_readline(sa,fn)
+stralloc *sa;
+char *fn;
+{
+ substdio ss;
+ int fd;
+ int match;
+
+ fd = open_read(fn);
+ if (fd == -1) { if (errno == error_noent) return 0; return -1; }
+ 
+ substdio_fdbuf(&ss,read,fd,inbuf,sizeof(inbuf));
+
+ if (getln(&ss,sa,&match,'\n') == -1) { close(fd); return -1; }
+
+ striptrailingwhitespace(sa);
+ close(fd);
+ return 1;
+}
+
+int control_readint(i,fn)
+int *i;
+char *fn;
+{
+ unsigned long u;
+ switch(control_readline(&line,fn))
+  {
+   case 0: return 0;
+   case -1: return -1;
+  }
+ if (!stralloc_0(&line)) return -1;
+ if (!scan_ulong(line.s,&u)) return 0;
+ *i = u;
+ return 1;
+}
+
+int control_readfile(sa,fn,flagme)
+stralloc *sa;
+char *fn;
+int flagme;
+{
+ substdio ss;
+ int fd;
+ int match;
+
+ if (!stralloc_copys(sa,"")) return -1;
+
+ fd = open_read(fn);
+ if (fd == -1) 
+  {
+   if (errno == error_noent)
+    {
+     if (flagme && meok)
+      {
+       if (!stralloc_copy(sa,&me)) return -1;
+       if (!stralloc_0(sa)) return -1;
+       return 1;
+      }
+     return 0;
+    }
+   return -1;
+  }
+
+ substdio_fdbuf(&ss,read,fd,inbuf,sizeof(inbuf));
+
+ for (;;)
+  {
+   if (getln(&ss,&line,&match,'\n') == -1) break;
+   if (!match && !line.len) { close(fd); return 1; }
+   striptrailingwhitespace(&line);
+   if (!stralloc_0(&line)) break;
+   if (line.s[0])
+     if (line.s[0] != '#')
+       if (!stralloc_cat(sa,&line)) break;
+   if (!match) { close(fd); return 1; }
+  }
+ close(fd);
+ return -1;
+}