lua_load* replaced by a simple lua_load

lapi.c

@@ -1,11 +1,10 @@
 /*
-** $Id: lapi.c,v 1.192 2002/05/16 18:39:46 roberto Exp roberto $
+** $Id: lapi.c,v 1.193 2002/05/27 20:35:40 roberto Exp roberto $
 ** Lua API
 ** See Copyright Notice in lua.h
 */
 
 
-#include <stdio.h>
 #include <string.h>
 
 #include "lua.h"
@@ -31,11 +30,6 @@ const char lua_ident[] =
   "$URL: www.lua.org $\n";
 
 
-#ifndef lua_filerror
-#include <errno.h>
-#define lua_fileerror	(strerror(errno))
-#endif
-
 
 #ifndef api_check
 #define api_check(L, o)		((void)1)
@@ -368,9 +362,11 @@ LUA_API const char *lua_pushvfstring (lua_State *L, const char *fmt,
 LUA_API const char *lua_pushfstring (lua_State *L, const char *fmt, ...) {
   const char *ret;
   va_list argp;
+  lua_lock(L);
   va_start(argp, fmt);
-  ret = lua_pushvfstring(L, fmt, argp);
+  ret = luaO_pushvfstring(L, fmt, argp);
   va_end(argp);
+  lua_unlock(L);
   return ret;
 }
 
@@ -567,54 +563,19 @@ LUA_API int lua_pcall (lua_State *L, int nargs, int nresults, int errf) {
 }
 
 
-static int errfile (lua_State *L, const char *filename) {
-  if (filename == NULL) filename = "stdin";
-  lua_pushfstring(L, "cannot read %s: %s", filename, lua_fileerror);
-  return LUA_ERRFILE;
-}
-
-
-LUA_API int lua_loadfile (lua_State *L, const char *filename) {
+LUA_API int lua_load (lua_State *L, lua_Getblock getblock, void *ud,
+                      int binary, const char *chunkname) {
   ZIO z;
-  int fnindex;
   int status;
-  int bin;  /* flag for file mode */
-  FILE *f = (filename == NULL) ? stdin : fopen(filename, "r");
-  if (f == NULL) return errfile(L, filename);  /* unable to open file */
-  bin = (ungetc(getc(f), f) == LUA_SIGNATURE[0]);
-  if (bin && f != stdin) {
-    fclose(f);
-    f = fopen(filename, "rb");  /* reopen in binary mode */
-    if (f == NULL) return errfile(L, filename);  /* unable to reopen file */
-  }
-  if (filename == NULL)
-    lua_pushliteral(L, "=stdin");
-  else
-    lua_pushfstring(L, "@%s", filename);
-  fnindex = lua_gettop(L);  /* stack index of file name */
-  luaZ_Fopen(&z, f, lua_tostring(L, fnindex));
-  status = luaD_protectedparser(L, &z, bin);
-  lua_remove(L, fnindex);
-  if (ferror(f)) {
-    if (status == 0) lua_pop(L, 1);  /* remove chunk */
-    return errfile(L, filename);
-  }
-  if (f != stdin)
-    fclose(f);
+  lua_lock(L);
+  if (!chunkname) chunkname = "?";
+  luaZ_init(&z, getblock, ud, chunkname);
+  status = luaD_protectedparser(L, &z, binary);
+  lua_unlock(L);
   return status;
 }
 
 
-LUA_API int lua_loadbuffer (lua_State *L, const char *buff, size_t size,
-                          const char *name) {
-  ZIO z;
-  if (!name) name = "?";
-  luaZ_mopen(&z, buff, size, name);
-  return luaD_protectedparser(L, &z, buff[0]==LUA_SIGNATURE[0]);
-}
-
-
-
 /*
 ** Garbage-collection functions
 */
@@ -722,7 +683,7 @@ LUA_API void lua_concat (lua_State *L, int n) {
   lua_lock(L);
   api_checknelems(L, n);
   if (n >= 2) {
-    luaV_strconc(L, n, L->top - L->ci->base - 1);
+    luaV_concat(L, n, L->top - L->ci->base - 1);
     L->top -= (n-1);
     luaC_checkGC(L);
   }
@@ -763,62 +724,3 @@ LUA_API int lua_pushupvalues (lua_State *L) {
 }
 
 
-
-/*
-** {======================================================
-** compatibility code
-** =======================================================
-*/
-
-
-static void callalert (lua_State *L, int status) {
-  if (status != 0) {
-    int top = lua_gettop(L);
-    lua_getglobal(L, "_ALERT");
-    lua_insert(L, -2);
-    lua_pcall(L, 1, 0, 0);
-    lua_settop(L, top-1);
-  }
-}
-
-
-LUA_API int lua_call (lua_State *L, int nargs, int nresults) {
-  int status;
-  int errpos = lua_gettop(L) - nargs;
-  lua_getglobal(L, "_ERRORMESSAGE");
-  lua_insert(L, errpos);  /* put below function and args */
-  status = lua_pcall(L, nargs, nresults, errpos);
-  lua_remove(L, errpos);
-  callalert(L, status);
-  return status;
-}
-
-static int aux_do (lua_State *L, int status) {
-  if (status == 0) {  /* parse OK? */
-    int err = lua_gettop(L);
-    lua_getglobal(L, "_ERRORMESSAGE");
-    lua_insert(L, err);
-    status = lua_pcall(L, 0, LUA_MULTRET, err);  /* call main */
-    lua_remove(L, err);  /* remove error function */
-  }
-  callalert(L, status);
-  return status;
-}
-
-
-LUA_API int lua_dofile (lua_State *L, const char *filename) {
-  return aux_do(L, lua_loadfile(L, filename));
-}
-
-
-LUA_API int lua_dobuffer (lua_State *L, const char *buff, size_t size,
-                          const char *name) {
-  return aux_do(L, lua_loadbuffer(L, buff, size, name));
-}
-
-
-LUA_API int lua_dostring (lua_State *L, const char *str) {
-  return lua_dobuffer(L, str, strlen(str), str);
-}
-
-/* }====================================================== */

ldo.c

@@ -1,5 +1,5 @@
 /*
-** $Id: ldo.c,v 1.176 2002/05/16 18:39:46 roberto Exp roberto $
+** $Id: ldo.c,v 1.177 2002/05/27 20:35:40 roberto Exp roberto $
 ** Stack and Call structure of Lua
 ** See Copyright Notice in lua.h
 */
@@ -420,7 +420,6 @@ int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {
   struct SParser p;
   lu_mem old_blocks;
   int status;
-  lua_lock(L);
   p.z = z; p.bin = bin;
   /* before parsing, give a (good) chance to GC */
   if (G(L)->nblocks + G(L)->nblocks/4 >= G(L)->GCthreshold)
@@ -437,7 +436,6 @@ int luaD_protectedparser (lua_State *L, ZIO *z, int bin) {
     setobj(L->top++, &p.err);
     lua_assert(status != LUA_ERRRUN);
   }
-  lua_unlock(L);
   return status;
 }
 

lua.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lua.h,v 1.133 2002/05/16 18:39:46 roberto Exp roberto $
+** $Id: lua.h,v 1.134 2002/05/23 20:29:05 roberto Exp roberto $
 ** Lua - An Extensible Extension Language
 ** Tecgraf: Grupo de Tecnologia em Computacao Grafica, PUC-Rio, Brazil
 ** e-mail: [email protected]
@@ -51,6 +51,11 @@ typedef struct lua_State lua_State;
 typedef int (*lua_CFunction) (lua_State *L);
 
 
+/*
+** function for loading Lua code
+*/
+typedef const char * (*lua_Getblock) (void *ud, size_t *size);
+
 
 /*
 ** basic types
@@ -176,9 +181,8 @@ LUA_API void  lua_setmetatable (lua_State *L, int objindex);
 */
 LUA_API void  lua_rawcall (lua_State *L, int nargs, int nresults);
 LUA_API int   lua_pcall (lua_State *L, int nargs, int nresults, int errf);
-LUA_API int   lua_loadfile (lua_State *L, const char *filename);
-LUA_API int   lua_loadbuffer (lua_State *L, const char *buff, size_t size,
-                              const char *name);
+LUA_API int   lua_load (lua_State *L, lua_Getblock getblock, void *ud,
+                        int binary, const char *chunkname);
 
 
 /*
@@ -249,11 +253,6 @@ LUA_API void *lua_newuserdata (lua_State *L, size_t size);
 ** compatibility macros and functions
 */
 
-LUA_API int   lua_call (lua_State *L, int nargs, int nresults);
-LUA_API int   lua_dofile (lua_State *L, const char *filename);
-LUA_API int   lua_dostring (lua_State *L, const char *str);
-LUA_API int   lua_dobuffer (lua_State *L, const char *buff, size_t size,
-                            const char *name);
 
 LUA_API int lua_pushupvalues (lua_State *L);
 
@@ -292,6 +291,9 @@ LUA_API int lua_pushupvalues (lua_State *L);
 ** =======================================================================
 */
 
+/* binary files start with <esc>Lua */
+#define	LUA_SIGNATURE	"\033Lua"
+
 /* formats for Lua numbers */
 #ifndef LUA_NUMBER_SCAN
 #define LUA_NUMBER_SCAN		"%lf"

lundump.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lundump.h,v 1.23 2001/06/28 13:55:17 lhf Exp lhf $
+** $Id: lundump.h,v 1.23 2001/07/12 19:34:03 roberto Exp roberto $
 ** load pre-compiled Lua chunks
 ** See Copyright Notice in lua.h
 */
@@ -19,7 +19,6 @@ int luaU_endianness (void);
 /* definitions for headers of binary files */
 #define	VERSION		0x41		/* last format change was in 4.1 */
 #define	VERSION0	0x41		/* last major  change was in 4.1 */
-#define	LUA_SIGNATURE	"\033Lua"	/* binary files start with <esc>Lua */
 
 /* a multiple of PI for testing native format */
 /* multiplying by 1E8 gives non-trivial integer values */

lzio.c

@@ -1,69 +1,44 @@
 /*
-** $Id: lzio.c,v 1.15 2001/11/28 20:13:13 roberto Exp roberto $
+** $Id: lzio.c,v 1.16 2002/04/29 12:37:41 roberto Exp roberto $
 ** a generic input stream interface
 ** See Copyright Notice in lua.h
 */
 
 
-
-#include <stdio.h>
 #include <string.h>
 
 #include "lua.h"
 
+#include "llimits.h"
 #include "lzio.h"
 
 
 
-/* ----------------------------------------------------- memory buffers --- */
-
-static int zmfilbuf (ZIO* z) {
-  (void)z;  /* to avoid warnings */
-  return EOZ;
-}
-
-
-ZIO* zmopen (ZIO* z, const char* b, size_t size, const char *name) {
-  if (b==NULL) return NULL;
-  z->n = size;
-  z->p = (const unsigned char *)b;
-  z->filbuf = zmfilbuf;
-  z->u = NULL;
-  z->name = name;
-  return z;
-}
-
-
-/* -------------------------------------------------------------- FILEs --- */
-
-static int zffilbuf (ZIO* z) {
-  size_t n;
-  if (feof((FILE *)z->u)) return EOZ;
-  n = fread(z->buffer, 1, ZBSIZE, (FILE *)z->u);
-  if (n==0) return EOZ;
-  z->n = n-1;
-  z->p = z->buffer;
+int luaZ_fill (ZIO *z) {
+  size_t size;
+  const char *buff = z->getblock(z->ud, &size);
+  if (buff == NULL || size == 0) return EOZ;
+  z->n = size - 1;
+  z->p = buff;
   return *(z->p++);
 }
 
 
-ZIO* zFopen (ZIO* z, FILE* f, const char *name) {
-  if (f==NULL) return NULL;
-  z->n = 0;
-  z->p = z->buffer;
-  z->filbuf = zffilbuf;
-  z->u = f;
+void luaZ_init (ZIO *z, lua_Getblock getblock, void *ud, const char *name) {
+  z->getblock = getblock;
+  z->ud = ud;
   z->name = name;
-  return z;
+  z->n = 0;
+  z->p = NULL;
 }
 
 
 /* --------------------------------------------------------------- read --- */
-size_t zread (ZIO *z, void *b, size_t n) {
+size_t luaZ_zread (ZIO *z, void *b, size_t n) {
   while (n) {
     size_t m;
     if (z->n == 0) {
-      if (z->filbuf(z) == EOZ)
+      if (luaZ_fill(z) == EOZ)
         return n;  /* return number of missing bytes */
       else {
         ++z->n;  /* filbuf removed first byte; put back it */
@@ -79,3 +54,4 @@ size_t zread (ZIO *z, void *b, size_t n) {
   }
   return 0;
 }
+

lzio.h

@@ -1,5 +1,5 @@
 /*
-** $Id: lzio.h,v 1.8 2001/03/26 14:31:49 roberto Exp roberto $
+** $Id: lzio.h,v 1.9 2002/04/29 12:37:41 roberto Exp roberto $
 ** Buffered streams
 ** See Copyright Notice in lua.h
 */
@@ -8,43 +8,37 @@
 #ifndef lzio_h
 #define lzio_h
 
-#include <stdio.h>
-
+#include "lua.h"
 
 
 /* For Lua only */
-#define zFopen	luaZ_Fopen
-#define zmopen	luaZ_mopen
-#define zread	luaZ_read
+#define zread	luaZ_zread
 
 #define EOZ	(-1)			/* end of stream */
 
 typedef struct zio ZIO;
 
-ZIO* zFopen (ZIO* z, FILE* f, const char *name);	/* open FILEs */
-ZIO* zmopen (ZIO* z, const char* b, size_t size, const char *name); /* memory */
-
-size_t zread (ZIO* z, void* b, size_t n);	/* read next n bytes */
+#define zgetc(z)  (((z)->n--)>0 ? \
+			cast(int, cast(unsigned char, *(z)->p++)) : \
+			luaZ_fill(z))
 
-#define zgetc(z)	(((z)->n--)>0 ? ((int)*(z)->p++): (z)->filbuf(z))
 #define zname(z)	((z)->name)
 
+void luaZ_init (ZIO *z, lua_Getblock getblock, void *ud, const char *name);
+size_t luaZ_zread (ZIO* z, void* b, size_t n);	/* read next n bytes */
 
 
 /* --------- Private Part ------------------ */
 
-#ifndef ZBSIZE
-#define ZBSIZE	256			/* buffer size */
-#endif
-
 struct zio {
-  size_t n;				/* bytes still unread */
-  const unsigned char* p;		/* current position in buffer */
-  int (*filbuf)(ZIO* z);
-  void* u;				/* additional data */
+  size_t n;			/* bytes still unread */
+  const char *p;		/* current position in buffer */
+  lua_Getblock getblock;
+  void* ud;			/* additional data */
   const char *name;
-  unsigned char buffer[ZBSIZE];		/* buffer */
 };
 
 
+int luaZ_fill (ZIO *z);
+
 #endif