1 files changed, 84 insertions, 0 deletions
diff --git a/booki.c b/booki.c
index 3edbd8f..6a5315e 100644
--- a/booki.c
+++ b/booki.c
@@ -459,11 +459,95 @@ int* get_number_field(BOOK* book, char* name) {
         return 0;
 }
 
+
+int format_book(BOOK book, char* format, char* buf) {
+    // example: %title by %author
+    // field is defined following %, ending with a space
+    int pos = 0;
+
+    char c;
+    char field_buf[25];
+    int field_pos = 0;
+    bool parsing = false;
+
+    DataField datafield;
+    ES string_field;
+    int number_field;
+    while (true) {
+        c = *format;
+
+        // are we done parsing?
+        if (parsing && (c == ' ' || c == '\0')) {
+            //printf("'%c': done parsing\n", c);
+            parsing = false;
+            // need to find what the field is
+            for (int i = 0; i < BOOK_FIELDS_COUNT; i++) {
+                datafield = BOOK_FIELDS[i];
+                if (!ATTR_MATCH(field_buf, datafield.name))
+                    continue;
+                if (datafield.type == booki_string) {
+                    string_field = *(get_string_field(&book, datafield.name));
+                    // if we don't have anything in this field, don't print it
+                    if (!string_field.ptr)
+                        break;
+                    pos = pos + concat_es_print(&string_field, buf + pos);
+                    //printf(esfmt, datafield.name, size, str);
+                // number fields
+                } else if (datafield.type == booki_number) {
+                    number_field = *(get_number_field(&book, datafield.name));
+                    if (!number_field)
+                        continue;
+                    pos = pos + sprintf(buf + pos, "%d", number_field);
+                    //printf(intfmt, datafield.name, number_field);
+                }
+            }
+
+            // reset field buffer
+            for (int i = 0; i < field_pos; i++)
+                field_buf[i] = '\0';
+            field_pos = 0;
+
+            // capture the space, if it was there
+            if (c == ' ') {
+                buf[pos++] = c;
+            } else {
+                break;
+            }
+        // are we still parsing?
+        } else if (parsing) {
+            //printf("'%c': still parsing\n", c);
+            field_buf[field_pos++] = c;
+        // are we ready to parse?
+        } else if (!parsing && c == '%') {
+            //printf("'%c': start parsing\n", c);
+            parsing = true;
+        // are we not ready to parse?
+        } else if (!parsing) {
+            //printf("'%c': not parsing\n", c);
+            buf[pos++] = c;
+        }
+        format++;
+    }
+    return pos;
+}
+
+
 void print_book(BOOK book, bool all_fields) {
+    /*
     char str[100];
     int size = concat_es_print(&(book.author), str);
     printf("%.*s by %.*s\n", book.title.len, book.title.ptr, size, str);
+    */
+
+    // use a default format
+    char *fmt = "%title by %author [%language]";
+    char buf[255];
+    int len = format_book(book, fmt, buf);
+    printf("%.*s\n", len, buf);
+
     if (all_fields) {
+        int size;
+        char str[100];
         char* esfmt = " - %s: %.*s\n";
         char* intfmt = " - %s: %d\n";