mirror of
https://github.com/lua/lua.git
synced 2025-01-28 06:03:00 +08:00
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
/*
|
|
* zio.h
|
|
* a generic input stream interface
|
|
* $Id: zio.h,v 1.1 1997/06/16 16:50:22 roberto Exp roberto $
|
|
*/
|
|
|
|
#ifndef zio_h
|
|
#define zio_h
|
|
|
|
#include <stdio.h>
|
|
|
|
|
|
|
|
/* For Lua only */
|
|
#define zFopen luaz_Fopen
|
|
#define zfopen luaz_fopen
|
|
#define zpopen luaz_popen
|
|
#define zsopen luaz_sopen
|
|
#define zmopen luaz_mopen
|
|
|
|
#define EOZ (-1) /* end of stream */
|
|
|
|
typedef struct zio ZIO;
|
|
|
|
int zgetc(ZIO* z); /* get next byte */
|
|
int zungetc(ZIO* z); /* put back last byte read */
|
|
int zread(ZIO* z, void* b, int n); /* read next n bytes */
|
|
int zclose(ZIO* z); /* close stream */
|
|
|
|
ZIO* zFopen(ZIO* z, FILE* f); /* open FILEs */
|
|
ZIO* zfopen(ZIO* z, char* s, char* m); /* file by name */
|
|
ZIO* zpopen(ZIO* z, char* s, char* m); /* pipe */
|
|
ZIO* zsopen(ZIO* z, char* s); /* string */
|
|
ZIO* zmopen(ZIO* z, char* b, int size); /* memory */
|
|
|
|
#define zgetc(z) (--(z)->n>=0 ? ((int)*(z)->p++): (z)->filbuf(z))
|
|
#define zungetc(z) (++(z)->n,--(z)->p)
|
|
#define zclose(z) (*(z)->close)(z)
|
|
|
|
|
|
|
|
/* --------- Private Part ------------------ */
|
|
|
|
#define ZBSIZE 256 /* buffer size */
|
|
|
|
struct zio {
|
|
int n; /* bytes still unread */
|
|
unsigned char* p; /* current position in buffer */
|
|
int (*filbuf)(ZIO* z);
|
|
int (*close)(ZIO* z);
|
|
void* u; /* additional data */
|
|
unsigned char buffer[ZBSIZE]; /* buffer */
|
|
};
|
|
|
|
|
|
#endif
|