X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;f=src%2Freadwrite.h;fp=src%2Freadwrite.h;h=128e44a8a3e5534e40c7a98fa8feba800d53788f;hb=0e6c855b67e0cd3def7196396f3d1f45ff85b692;hp=cf4de14cb108750527cc0368e88ee2f68546cd43;hpb=0568c1c0f6735509f2a1afea31ecb5dc28f26bf4;p=plomrogue
diff --git a/src/readwrite.h b/src/readwrite.h
index cf4de14..128e44a 100644
--- a/src/readwrite.h
+++ b/src/readwrite.h
@@ -1,7 +1,6 @@
/* readwrite.h:
*
- * Routines for reading/writing (multi-)byte data from/to files. They ensure a
- * defined endianness.
+ * Routines for reading and writing files.
*/
#ifndef READWRITE_H
@@ -14,9 +13,21 @@
-/* Each function returns 0 on success and 1 on failure. "x" is the value to be
- * written to "file" for write_* functions and for read_* functions the pointer
- * to where the value read from "file" is to be written.
+/* Learn from "file" the largest line length (pointed to by "linemax_p"; length
+ * includes newline chars) and (pointed to by "n_lines_p" if it is not set to
+ * NULL) the number of lines (= number of newline chars).
+ *
+ * Returns 0 on success, 1 on error of fseek() (called to return to initial file
+ * reading position).
+ */
+extern uint8_t textfile_sizes(FILE * file, uint16_t * linemax_p,
+ uint16_t * n_lines_p);
+
+
+
+/* These routines for reading values "x" from / writing values to "file" ensure a
+ * defined endianness and consistent error codes: return 0 on success and 1 on
+ * fgetc()/fputc() failure.
*/
extern uint8_t read_uint8(FILE * file, uint8_t * x);
extern uint8_t read_uint16_bigendian(FILE * file, uint16_t * x);