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Input/output library to LUA

This commit is contained in:
Waldemar Celes 1993-12-17 16:41:19 -02:00
parent b405fb0ad7
commit 1923c7d620
1 changed files with 66 additions and 5 deletions
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71
iolib.c
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@ -1,16 +1,15 @@
/* /*
** iolib.c ** iolib.c
** Input/output library to LUA ** Input/output library to LUA
**
** Waldemar Celes Filho
** TeCGraf - PUC-Rio
** 19 May 93
*/ */
char *rcs_iolib="$Id: $";
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <stdio.h> #include <stdio.h>
#include <ctype.h> #include <ctype.h>
#include <sys/stat.h>
#ifdef __GNUC__ #ifdef __GNUC__
#include <floatingpoint.h> #include <floatingpoint.h>
#endif #endif
@ -109,6 +108,58 @@ static void io_writeto (void)
} }
/*
** Open a file to write appended.
** LUA interface:
** status = appendto (filename)
** where:
** status = 2 -> success (already exist)
** status = 1 -> success (new file)
** status = 0 -> error
*/
static void io_appendto (void)
{
lua_Object o = lua_getparam (1);
if (o == NULL) /* restore standart output */
{
if (out != stdout)
{
fclose (out);
out = stdout;
}
lua_pushnumber (1);
}
else
{
if (!lua_isstring (o))
{
lua_error ("incorrect argument to function 'appendto`");
lua_pushnumber (0);
}
else
{
int r;
FILE *fp;
struct stat st;
if (stat(lua_getstring(o), &st) == -1) r = 1;
else r = 2;
fp = fopen (lua_getstring(o),"a");
if (fp == NULL)
{
lua_pushnumber (0);
}
else
{
if (out != stdout) fclose (out);
out = fp;
lua_pushnumber (r);
}
}
}
}
/* /*
** Read a variable. On error put nil on stack. ** Read a variable. On error put nil on stack.
** LUA interface: ** LUA interface:
@ -183,7 +234,16 @@ static void io_read (void)
char f[80]; char f[80];
char s[256]; char s[256];
sprintf (f, "%%%ds", m); sprintf (f, "%%%ds", m);
fscanf (in, f, s); if (fgets (s, m, in) == NULL)
{
lua_pushnil();
return;
}
else
{
if (s[strlen(s)-1] == '\n')
s[strlen(s)-1] = 0;
}
switch (tolower(t)) switch (tolower(t))
{ {
case 'i': case 'i':
@ -394,6 +454,7 @@ void iolib_open (void)
{ {
lua_register ("readfrom", io_readfrom); lua_register ("readfrom", io_readfrom);
lua_register ("writeto", io_writeto); lua_register ("writeto", io_writeto);
lua_register ("appendto", io_appendto);
lua_register ("read", io_read); lua_register ("read", io_read);
lua_register ("write", io_write); lua_register ("write", io_write);
lua_register ("execute", io_execute); lua_register ("execute", io_execute);