Category : C Source Code
Archive   : IMDSRC78.ZIP
Filename : SWAP.H

/* This conditional extern statement is required when compiling with
Turbo C++
*/
#ifdef __cplusplus
extern "C" {
#endif

int swap (unsigned char *program_name,
unsigned char *command_line,
unsigned char *exec_return,
unsigned char *swap_fname);

#ifdef __cplusplus
}
#endif

int ems4_installed (void);
int xms_installed (void);

/* The return code from swap() will be one of the following. Codes other */
/* than SWAP_OK (0) indicate that an error occurred, and thus the program */
/* has NOT been swapped, and the new program has NOT been executed. */

#define SWAP_OK (0) /* Swapped OK and returned */
#define SWAP_NO_SHRINK (1) /* Could not shrink DOS memory size */
#define SWAP_NO_SAVE (2) /* Could not save program to XMS/EMS/disk*/
#define SWAP_NO_EXEC (3) /* Could not execute new program */


/* If swap() returns 3, SWAP_NO_EXEC, the byte/char pointed to by the */
/* parameter exec_return will be one of the following standard DOS error */
/* codes, as specified in the DOS technical reference manuals. */

#define BAD_FUNC (0x01) /* Bad DOS function number--unlikely */
#define FILE_NOT_FOUND (0x02) /* File not found--couldn't find program_name */
#define ACCESS_DENIED (0x05) /* Access denied--couldn't open program_name */
#define NO_MEMORY (0x08) /* Insufficient memory to run program_name */
#define BAD_ENVIRON (0x0A) /* Invalid environment segment--unlikely */
#define BAD_FORMAT (0x0B) /* Format invalid--unlikely */