Import cgit prototype from git tree

This enables basic cgit functionality, using libgit.a and xdiff/lib.a from
git + a custom "git.h" + openssl for sha1 routines.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 73 insertions, 0 deletions

diff --git a/config.c b/config.c
new file mode 100644
index 0000000..858ab69
--- /dev/null
+++ b/config.c
@@ -0,0 +1,73 @@
+#include "cgit.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 && isblank(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 cgit_read_config(const char *filename, configfn fn)
+{
+        int ret = 0, len;
+        char line[256];
+        const char *value;
+        FILE *f = fopen(filename, "r");
+
+        if (!f)
+                return -1;
+
+        while(len = read_config_line(f, line, &value, sizeof(line)))
+                (*fn)(line, value);
+
+        fclose(f);
+        return ret;
+}
+