From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sat, 24 Jul 2021 17:54:22 +0000 (-0700)
Subject: agsetfile: take a const char pointer instead of a mutable one
X-Git-Tag: 2.49.0~36^2~1
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7854b33e11f20dbf9a5536af2295febb4033d26c;p=graphviz

agsetfile: take a const char pointer instead of a mutable one

This function does not modify the contents of the argument passed to it. Related
to #634.
---

diff --git a/lib/cgraph/cgraph.h b/lib/cgraph/cgraph.h
index 536bf4209..1f7c1656d 100644
--- a/lib/cgraph/cgraph.h
+++ b/lib/cgraph/cgraph.h
@@ -256,7 +256,7 @@ CGRAPH_API Agraph_t *agread(void *chan, Agdisc_t * disc);
 CGRAPH_API Agraph_t *agmemread(const char *cp);
 CGRAPH_API Agraph_t *agmemconcat(Agraph_t *g, const char *cp);
 CGRAPH_API void agreadline(int);
-CGRAPH_API void agsetfile(char *);
+CGRAPH_API void agsetfile(const char *);
 CGRAPH_API Agraph_t *agconcat(Agraph_t * g, void *chan, Agdisc_t * disc);
 CGRAPH_API int agwrite(Agraph_t * g, void *chan);
 CGRAPH_API int agisdirected(Agraph_t * g);
diff --git a/lib/cgraph/scan.l b/lib/cgraph/scan.l
index 938d07bb2..3394a75ac 100644
--- a/lib/cgraph/scan.l
+++ b/lib/cgraph/scan.l
@@ -45,7 +45,7 @@ void agreadline(int n) { line_num = n; }
 
   /* (Re)set file:
    */
-void agsetfile(char* f) { InputFile = f; line_num = 1; }
+void agsetfile(const char* f) { InputFile = f; line_num = 1; }
 
 /* There is a hole here, because switching channels
  * requires pushing back whatever was previously read.
diff --git a/lib/ingraphs/ingraphs.c b/lib/ingraphs/ingraphs.c
index e4d6602c4..4d7ae562f 100644
--- a/lib/ingraphs/ingraphs.c
+++ b/lib/ingraphs/ingraphs.c
@@ -21,7 +21,7 @@ typedef struct {
     char *dummy;
 } Agraph_t;
 
-extern void agsetfile(char *);
+extern void agsetfile(const char *);
 
 #include <ingraphs/ingraphs.h>