struct gl_fragment_program_state {
	unsigned char _Enabled;
	struct gl_fragment_program *_TexEnvProgram;
};
struct gl_shader_state {
	struct gl_shader_program *CurrentProgram;
};
struct gl_constants {
	unsigned int MaxTextureUnits;
} GLvertexformat;
typedef struct {
	struct gl_constants Const;
	struct gl_fragment_program_state FragmentProgram;
	struct gl_shader_state Shader;
} GLcontext;
struct mode_opt {
};
struct state_key {
	unsigned int enabled_units;
	struct {
		unsigned int NumArgsRGB:2;
		unsigned int ModeRGB:4;
		struct mode_opt OptRGB[3];
		unsigned int ModeA:4;
	} unit[8];
};
struct ureg {
	unsigned int file:4;
	unsigned int idx:8;
};
struct texenv_fragment_program {
	struct ureg src_previous;
};
emit_combine(struct texenv_fragment_program *p, unsigned int mode)
{
	if (mode)
		emit_arith(p);
}
struct ureg
emit_texenv(struct texenv_fragment_program *p,
			       unsigned int unit)
{
	struct state_key *key;
	emit_combine(p, key->unit[unit].ModeRGB);
}
create_new_program(GLcontext *ctx)
{
	struct texenv_fragment_program p;
	unsigned int unit;
	for (; unit < ctx->Const.MaxTextureUnits; ++unit)
		p.src_previous = emit_texenv(&p, unit);
}

_mesa_UpdateTexEnvProgram()
{
	GLcontext *ctx;
	create_new_program(ctx);
}