From b5a4ed89c89dd94b21f4c9936abc2567a1553555 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Sun, 6 Mar 2011 14:25:41 +0000
Subject: Inhibit warning message spam by introducing a repeat counter.

---
 fitz/base_error.c | 37 ++++++++++++++++++++++++++++++++++---
 fitz/fitz.h       |  1 +
 2 files changed, 35 insertions(+), 3 deletions(-)

(limited to 'fitz')

diff --git a/fitz/base_error.c b/fitz/base_error.c
index 5aa8768c..4117bc92 100644
--- a/fitz/base_error.c
+++ b/fitz/base_error.c
@@ -1,19 +1,45 @@
 #include "fitz.h"
 
+enum { LINELEN = 160, LINECOUNT = 25 };
+
+static char warnmessage[LINELEN] = "";
+static int warncount = 0;
+
+void fz_flushwarnings(void)
+{
+	if (warncount > 1)
+		fprintf(stderr, "warning: ... repeated %d times ...\n", warncount);
+	warnmessage[0] = 0;
+	warncount = 0;
+}
+
 void fz_warn(char *fmt, ...)
 {
 	va_list ap;
-	fprintf(stderr, "warning: ");
+	char buf[LINELEN];
+
 	va_start(ap, fmt);
-	vfprintf(stderr, fmt, ap);
+	vsnprintf(buf, sizeof buf, fmt, ap);
 	va_end(ap);
-	fprintf(stderr, "\n");
+
+	if (!strcmp(buf, warnmessage))
+	{
+		warncount++;
+	}
+	else
+	{
+		fz_flushwarnings();
+		fprintf(stderr, "warning: %s\n", buf);
+		fz_strlcpy(warnmessage, buf, sizeof warnmessage);
+		warncount = 1;
+	}
 }
 
 fz_error
 fz_throwimp(const char *file, int line, const char *func, char *fmt, ...)
 {
 	va_list ap;
+	fz_flushwarnings();
 	fprintf(stderr, "+ %s:%d: %s(): ", file, line, func);
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
@@ -26,6 +52,7 @@ fz_error
 fz_rethrowimp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...)
 {
 	va_list ap;
+	fz_flushwarnings();
 	fprintf(stderr, "| %s:%d: %s(): ", file, line, func);
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
@@ -38,6 +65,7 @@ void
 fz_catchimp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...)
 {
 	va_list ap;
+	fz_flushwarnings();
 	fprintf(stderr, "\\ %s:%d: %s(): ", file, line, func);
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
@@ -49,6 +77,7 @@ fz_error
 fz_throwimpx(char *fmt, ...)
 {
 	va_list ap;
+	fz_flushwarnings();
 	fprintf(stderr, "+ ");
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
@@ -61,6 +90,7 @@ fz_error
 fz_rethrowimpx(fz_error cause, char *fmt, ...)
 {
 	va_list ap;
+	fz_flushwarnings();
 	fprintf(stderr, "| ");
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
@@ -73,6 +103,7 @@ void
 fz_catchimpx(fz_error cause, char *fmt, ...)
 {
 	va_list ap;
+	fz_flushwarnings();
 	fprintf(stderr, "\\ ");
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
diff --git a/fitz/fitz.h b/fitz/fitz.h
index 13e285e6..14372efd 100644
--- a/fitz/fitz.h
+++ b/fitz/fitz.h
@@ -113,6 +113,7 @@ int gettimeofday(struct timeval *tv, struct timezone *tz);
 typedef int fz_error;
 
 void fz_warn(char *fmt, ...) __printflike(1, 2);
+void fz_flushwarnings(void);
 
 fz_error fz_throwimp(const char *file, int line, const char *func, char *fmt, ...) __printflike(4, 5);
 fz_error fz_rethrowimp(const char *file, int line, const char *func, fz_error cause, char *fmt, ...) __printflike(5, 6);
-- 
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