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Check fgets for return value to avoid warnings.

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@695 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
spanne 2006-08-05 16:31:20 +00:00
parent e6727385dd
commit 3929b150ac
4 changed files with 55 additions and 17 deletions
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8
freeglut/freeglut/ChangeLog
View File

@ -1168,3 +1168,11 @@ generated by autogen.sh.
(303) Moved GLUT_INIT_STATE to <GL/freeglut_ext.h>, it is not part of the
original GLUT.
**************************************************************************
* Changes on August 05, 2006.
**************************************************************************
(304) Updated build requirements for SuSE 10.1.
(305) Check fgets for return value to avoid warnings.

24
freeglut/freeglut/progs/demos/Fractals/fractals.c
View File

@ -208,6 +208,16 @@ Special(int key, int x, int y)
}
static void
checkedFGets ( char *s, int size, FILE *stream )
{
if ( fgets ( s, size, stream ) == NULL ) {
fprintf ( stderr, "fgets failed\n");
exit ( EXIT_FAILURE );
}
}
void readConfigFile ( char *fnme )
{
FILE *fptr = fopen ( fnme, "rt" ) ;
@ -217,13 +227,13 @@ void readConfigFile ( char *fnme )
if ( fptr )
{
/* Read a header line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* Read a comment line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* Read the window title */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* We assume here that this line will not exceed 79 characters plus a
newline (window_title is 80 characters long). That'll cause a buffer
overflow. For a simple program like this, though, we're letting it
@ -232,21 +242,21 @@ void readConfigFile ( char *fnme )
sscanf ( inputline, "%[a-zA-Z0-9!@#$%^&*()+=/\\_-\" ]", window_title ) ;
/* Read a comment line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* Read the number of affine transformations */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
sscanf ( inputline, "%d", &num_trans ) ;
affine = (AffineTrans *)malloc ( num_trans * sizeof(AffineTrans) ) ;
/* Read a comment line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
for ( i = 0; i < num_trans; i++ )
{
/* Read an affine transformation definition */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
sscanf ( inputline, "%lf %lf %lf %lf %lf %lf", &affine[i].a00, &affine[i].a01,
&affine[i].a10, &affine[i].a11, &affine[i].b0, &affine[i].b1 ) ;
}

24
freeglut/freeglut/progs/demos/Fractals_random/fractals_random.c
View File

@ -255,6 +255,16 @@ MouseWheel ( int wheel_number, int direction, int x, int y )
}
static void
checkedFGets ( char *s, int size, FILE *stream )
{
if ( fgets ( s, size, stream ) == NULL ) {
fprintf ( stderr, "fgets failed\n");
exit ( EXIT_FAILURE );
}
}
void readConfigFile ( char *fnme )
{
FILE *fptr = fopen ( fnme, "rt" ) ;
@ -264,13 +274,13 @@ void readConfigFile ( char *fnme )
if ( fptr )
{
/* Read a header line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* Read a comment line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* Read the window title */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* We assume here that this line will not exceed 79 characters plus a
newline (window_title is 80 characters long). That'll cause a buffer
overflow. For a simple program like this, though, we're letting it
@ -279,21 +289,21 @@ void readConfigFile ( char *fnme )
sscanf ( inputline, "%[a-zA-Z0-9!@#$%^&*()+=/\\_-\" ]", window_title ) ;
/* Read a comment line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
/* Read the number of affine transformations */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
sscanf ( inputline, "%d", &num_trans ) ;
affine = (AffineTrans *)malloc ( num_trans * sizeof(AffineTrans) ) ;
/* Read a comment line */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
for ( i = 0; i < num_trans; i++ )
{
/* Read an affine transformation definition */
fgets ( inputline, 256, fptr ) ;
checkedFGets ( inputline, sizeof ( inputline ), fptr ) ;
sscanf ( inputline, "%lf %lf %lf %lf %lf %lf", &affine[i].a00, &affine[i].a01,
&affine[i].a10, &affine[i].a11, &affine[i].b0, &affine[i].b1 ) ;
}

16
freeglut/freeglut/progs/demos/Lorenz/lorenz.c
View File

@ -107,6 +107,16 @@ void advance_in_time ( double time_step, double position[3], double new_position
( deriv0[i] + 2.0 * ( deriv1[i] + deriv2[i] ) + deriv3[i] ) ;
}
static void
checkedFGets ( char *s, int size, FILE *stream )
{
if ( fgets ( s, size, stream ) == NULL ) {
fprintf ( stderr, "fgets failed\n");
exit ( EXIT_FAILURE );
}
}
/* GLUT callbacks */
#define INPUT_LINE_LENGTH 80
@ -142,15 +152,15 @@ void key_cb ( unsigned char key, int x, int y )
case 'm' : case 'M' : /* Modify the Lorenz parameters */
printf ( "Please enter new value for <sigma> (default %f, currently %f): ", s0, sigma ) ;
fgets ( inputline, INPUT_LINE_LENGTH-1, stdin ) ;
checkedFGets ( inputline, sizeof ( inputline ), stdin ) ;
sscanf ( inputline, "%lf", &sigma ) ;
printf ( "Please enter new value for <b> (default %f, currently %f): ", b0, b ) ;
fgets ( inputline, INPUT_LINE_LENGTH-1, stdin ) ;
checkedFGets ( inputline, sizeof ( inputline ), stdin ) ;
sscanf ( inputline, "%lf", &b ) ;
printf ( "Please enter new value for <r> (default %f, currently %f): ", r0, r ) ;
fgets ( inputline, INPUT_LINE_LENGTH-1, stdin ) ;
checkedFGets ( inputline, sizeof ( inputline ), stdin ) ;
sscanf ( inputline, "%lf", &r ) ;
break ;