X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Freadwrite.h;h=6f7bce377f82f40a4b68a9bcce33031d05b619cf;hb=52f02f0f8614afa7d4776e90d955eff9c3659f80;hp=128e44a8a3e5534e40c7a98fa8feba800d53788f;hpb=0e6c855b67e0cd3def7196396f3d1f45ff85b692;p=plomrogue

diff --git a/src/readwrite.h b/src/readwrite.h
index 128e44a..6f7bce3 100644
--- a/src/readwrite.h
+++ b/src/readwrite.h
@@ -6,13 +6,38 @@
 #ifndef READWRITE_H
 #define READWRITE_H
 
-
-
 #include <stdio.h> /* for FILE typedef */
 #include <stdint.h> /* for uint8_t, uint16_t, uint32_t */
 
 
 
+/* Wrappers to calling from function called "f" of fopen(), fclose(), fgets()
+ * and fwrite() and calling exit_err() with appropriate error messages.
+ */
+extern FILE * try_fopen(char * path, char * mode, char * f);
+extern void try_fclose(FILE * file, char * f);
+extern void try_fwrite(void * ptr, size_t size, size_t nmemb, FILE * stream,
+                       char * f);
+
+/* Wrapper to calling fgets() from function called "f". The return code of
+ * fgets() is returned unless it is NULL *and* ferror() indicates that an error
+ * occured; otherwise end of file is assumed and NULL is returned properly.
+ */
+extern char * try_fgets(char * line, int size, FILE * file, char * f);
+
+/* Wrapper to successive call of fclose() from function called "f" on "file",
+ * then unlink() on file at "p2" if it exists, then rename() on "p1" to "p2".
+ * Used for handling atomic saving of files via temp files.
+ */
+extern void try_fclose_unlink_rename(FILE * file, char * p1, char * p2,
+                                     char * f);
+
+/* Wrapper: Call textfile_sizes() from function called "f" to get max line
+ * length (includes newline char) of "file", exit via exit_err() with
+ * exit_trouble() on failure.
+ */
+extern uint16_t get_linemax(FILE * file, char * f);
+
 /* 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).
@@ -23,10 +48,8 @@
 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
+/* 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);
@@ -36,4 +59,6 @@ extern uint8_t write_uint8(uint8_t x, FILE * file);
 extern uint8_t write_uint16_bigendian(uint16_t x, FILE * file);
 extern uint8_t write_uint32_bigendian(uint32_t x, FILE * file);
 
+
+
 #endif