GLib Reference Manual | ||||
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## Limits of Basic TypesLimits of Basic Types — portable method of determining the limits of the standard types |

#include <glib.h> #define G_MININT #define G_MAXINT #define G_MAXUINT #define G_MINSHORT #define G_MAXSHORT #define G_MAXUSHORT #define G_MINLONG #define G_MAXLONG #define G_MAXULONG #define G_MININT8 #define G_MAXINT8 #define G_MAXUINT8 #define G_MININT16 #define G_MAXINT16 #define G_MAXUINT16 #define G_MININT32 #define G_MAXINT32 #define G_MAXUINT32 #define G_MININT64 #define G_MAXINT64 #define G_MAXUINT64 #define G_MAXSIZE #define G_MINSSIZE #define G_MAXSSIZE #define G_MINOFFSET #define G_MAXOFFSET #define G_MINFLOAT #define G_MAXFLOAT #define G_MINDOUBLE #define G_MAXDOUBLE

These macros provide a portable method to determine the limits of some of the standard integer and floating point types.

#define G_MININT8 ((gint8) 0x80)

The minimum value which can be held in a gint8.

Since 2.4

#define G_MAXINT8 ((gint8) 0x7f)

The maximum value which can be held in a gint8.

Since 2.4

#define G_MAXUINT8 ((guint8) 0xff)

The maximum value which can be held in a guint8.

Since 2.4

#define G_MININT16 ((gint16) 0x8000)

The minimum value which can be held in a gint16.

Since 2.4

#define G_MAXINT16 ((gint16) 0x7fff)

The maximum value which can be held in a gint16.

Since 2.4

#define G_MAXUINT16 ((guint16) 0xffff)

The maximum value which can be held in a guint16.

Since 2.4

#define G_MININT32 ((gint32) 0x80000000)

The minimum value which can be held in a gint32.

Since 2.4

#define G_MAXINT32 ((gint32) 0x7fffffff)

The maximum value which can be held in a gint32.

Since 2.4

#define G_MAXUINT32 ((guint32) 0xffffffff)

The maximum value which can be held in a guint32.

Since 2.4

#define G_MININT64 ((gint64) G_GINT64_CONSTANT(0x8000000000000000))

The minimum value which can be held in a gint64.

#define G_MAXINT64 G_GINT64_CONSTANT(0x7fffffffffffffff)

The maximum value which can be held in a gint64.

#define G_MAXUINT64 G_GINT64_CONSTANT(0xffffffffffffffffU)

The maximum value which can be held in a guint64.

#define G_MINFLOAT FLT_MIN

The minimum positive value which can be held in a gfloat.

If you are interested in the smallest value which can be held in a gfloat, use -G_MAX_FLOAT.

#define G_MINDOUBLE DBL_MIN

The minimum positive value which can be held in a gdouble.

If you are interested in the smallest value which can be held in a gdouble, use -G_MAXDOUBLE.