From 5d4a38a9efb9a6ed19e592fce8fcf73d1332d1b4 Mon Sep 17 00:00:00 2001
From: Sebastian Hack <hack@ipd.info.uni-karlsruhe.de>
Date: Tue, 14 Dec 2004 13:08:06 +0000
Subject: [PATCH] Added init function to appender. This fixes ir_snprintf,
 since the string was not cleaned.

[r4657]
---
 ir/ir/irprintf.c | 50 ++++++++++++++++++++++++++++++++----------------
 ir/ir/irprintf.h |  1 +
 2 files changed, 35 insertions(+), 16 deletions(-)

diff --git a/ir/ir/irprintf.c b/ir/ir/irprintf.c
index 96ded1ae5..0ba4b01c0 100644
--- a/ir/ir/irprintf.c
+++ b/ir/ir/irprintf.c
@@ -43,7 +43,15 @@
 
 
 /**
- * append a char to a string buffer
+ * Init the string.
+ */
+static void str_init(void *object, size_t n)
+{
+	strcpy(object, "");
+}
+
+/**
+ * append a char to a string buffer.
  */
 static void str_append_char(void *object, size_t n, char ch)
 {
@@ -56,15 +64,23 @@ static void str_append_char(void *object, size_t n, char ch)
 }
 
 /**
- * append a string to a string buffer
+ * append a string to a string buffer.
  */
 static void str_append_str(void *object, size_t n, const char *str)
 {
 	strncat(object, str, n);
 }
 
+
 /**
- * append a char to a file
+ * Init the file. i.e. do nothing.
+ */
+static void file_init(void *object, size_t n)
+{
+}
+
+/**
+ * append a char to a file.
  */
 static void file_append_char(void *object, size_t n, char ch)
 {
@@ -72,7 +88,7 @@ static void file_append_char(void *object, size_t n, char ch)
 }
 
 /**
- * append a string to a file
+ * append a string to a file.
  */
 static void file_append_str(void *object, size_t n, const char *str)
 {
@@ -83,6 +99,7 @@ static void file_append_str(void *object, size_t n, const char *str)
  * the file appender
  */
 static const appender_t file_appender = {
+	file_init,
 	file_append_char,
 	file_append_str
 };
@@ -91,6 +108,7 @@ static const appender_t file_appender = {
  * the string buffer appender
  */
 static const appender_t str_appender = {
+	str_init,
 	str_append_char,
 	str_append_str
 };
@@ -151,10 +169,19 @@ struct settings {
 	int alternate;
 };
 
+/* Length specifiers. */
+enum {
+	len_char,
+	len_short,
+	len_int,
+	len_long,
+	len_long_long
+};
+
+
 #define MIN(x,y) ((x) < (y) ? (x) : (y))
 #define MAX(x,y) ((x) > (y) ? (x) : (y))
 
-
 static void dump_with_settings(const appender_t *app, void *object, size_t limit,
 		const struct settings *settings, const char *str)
 {
@@ -181,17 +208,6 @@ static void dump_with_settings(const appender_t *app, void *object, size_t limit
 }
 
 
-
-/* Length specifiers. */
-enum {
-	len_char,
-	len_short,
-	len_int,
-	len_long,
-	len_long_long
-};
-
-
 /**
  * A small printf helper routine for ir nodes.
  * @param app An appender (this determines where the stuff is dumped
@@ -211,6 +227,8 @@ static void ir_common_vprintf(const appender_t *app, void *object,
 #define DUMP_STR(s) app->append_str(object, limit, s)
 #define DUMP_CH(ch) app->append_char(object, limit, ch)
 
+	app->init(object, limit);
+
 	for(i = 0, n = strlen(fmt); i < n; ++i) {
 		char ch = fmt[i];
 
diff --git a/ir/ir/irprintf.h b/ir/ir/irprintf.h
index 7023d2a95..60464f13f 100644
--- a/ir/ir/irprintf.h
+++ b/ir/ir/irprintf.h
@@ -27,6 +27,7 @@
  * Something that can append strings and chars to something.
  */
 typedef struct _appender_t {
+	void (*init)(void *object, size_t n);
 	void (*append_char)(void *object, size_t n, char ch);
 	void (*append_str)(void *object, size_t n, const char *str);
 } appender_t;
-- 
2.20.1