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-rw-r--r--Src/utils.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/Src/utils.c b/Src/utils.c
index 0490df516..383042dec 100644
--- a/Src/utils.c
+++ b/Src/utils.c
@@ -112,7 +112,20 @@ set_widearray(char *mb_array, Widechar_array wca)
#endif
-/* Print an error */
+/* Print an error
+
+ The following functions use the following printf-like format codes
+ (implemented by zerrmsg()):
+
+ Code Argument types Prints
+ %s const char * C string (null terminated)
+ %l const char *, int C string of given length (null not required)
+ %L long decimal value
+ %d int decimal value
+ %% (none) literal '%'
+ %c int character at that codepoint
+ %e int strerror() message (argument is typically 'errno')
+ */
static void
zwarning(const char *cmd, const char *fmt, va_list ap)
@@ -343,6 +356,7 @@ zerrmsg(FILE *file, const char *fmt, va_list ap)
fputs(errmsg + 1, file);
}
break;
+ /* When adding format codes, update the comment above zwarning(). */
}
} else {
putc(*fmt == Meta ? *++fmt ^ 32 : *fmt, file);