diff options
Diffstat (limited to 'clients/lib/old/iolib.c')
| -rw-r--r-- | clients/lib/old/iolib.c | 618 |
1 files changed, 0 insertions, 618 deletions
diff --git a/clients/lib/old/iolib.c b/clients/lib/old/iolib.c deleted file mode 100644 index 9ed7e479..00000000 --- a/clients/lib/old/iolib.c +++ /dev/null @@ -1,618 +0,0 @@ -/* -** iolib.c -** Input/output library to LUA -*/ - -char *rcs_iolib="$Id: iolib.c,v 1.44 1996/05/03 20:10:59 roberto Exp $"; - -#include <stdio.h> -#include <ctype.h> -#include <string.h> -#include <time.h> -#include <stdlib.h> -#include <errno.h> - -#include "lua.h" -#include "luadebug.h" -#include "lualib.h" - -static FILE *in=stdin, *out=stdout; - - -#ifdef POPEN -FILE *popen(); -int pclose(); -#else -#define popen(x,y) NULL /* that is, popen always fails */ -#define pclose(x) (-1) -#endif - - -static void pushresult (int i) -{ - if (i) - lua_pushnumber (1); - else - lua_pushnil(); -} - -static void closeread (void) -{ - if (in != stdin) - { - if (pclose(in) == -1) - fclose(in); - in = stdin; - } -} - -static void closewrite (void) -{ - if (out != stdout) - { - if (pclose(out) == -1) - fclose(out); - out = stdout; - } -} - -/* -** Open a file to read. -** LUA interface: -** status = readfrom (filename) -** where: -** status = 1 -> success -** status = nil -> error -*/ -static void io_readfrom (void) -{ - if (lua_getparam (1) == LUA_NOOBJECT) - { /* restore standart input */ - closeread(); - lua_pushnumber (1); - } - else - { - char *s = lua_check_string(1, "readfrom"); - FILE *fp = (*s == '|') ? popen(s+1, "r") : fopen(s, "r"); - if (fp == NULL) - lua_pushnil(); - else - { - closeread(); - in = fp; - lua_pushnumber (1); - } - } -} - - -/* -** Open a file to write. -** LUA interface: -** status = writeto (filename) -** where: -** status = 1 -> success -** status = nil -> error -*/ -static void io_writeto (void) -{ - if (lua_getparam (1) == LUA_NOOBJECT) /* restore standart output */ - { - closewrite(); - lua_pushnumber (1); - } - else - { - char *s = lua_check_string(1, "writeto"); - FILE *fp = (*s == '|') ? popen(s+1,"w") : fopen(s,"w"); - if (fp == NULL) - lua_pushnil(); - else - { - closewrite(); - out = fp; - lua_pushnumber (1); - } - } -} - - -/* -** Open a file to write appended. -** LUA interface: -** status = appendto (filename) -** where: -** status = 1 -> success -** status = nil -> error -*/ -static void io_appendto (void) -{ - char *s = lua_check_string(1, "appendto"); - FILE *fp = fopen (s, "a"); - if (fp == NULL) - lua_pushnil(); - else - { - if (out != stdout) fclose (out); - out = fp; - lua_pushnumber(1); - } -} - - -static char getformat (char *f, int *just, int *m, int *n) -{ - int t; - switch (*f++) - { - case 'q': case 'Q': - case 's': case 'S': - case 'i': case 'I': - t = tolower(*(f-1)); - break; - case 'f': case 'F': case 'g': case 'G': case 'e': case 'E': - t = 'f'; - break; - default: - t = 0; /* to avoid compiler warnings */ - lua_arg_error("read/write (format)"); - } - *just = (*f == '<' || *f == '>' || *f == '|') ? *f++ : '>'; - if (isdigit(*f)) - { - *m = 0; - while (isdigit(*f)) - *m = *m*10 + (*f++ - '0'); - } - else - *m = -1; - if (*f == '.') - { - f++; /* skip point */ - *n = 0; - while (isdigit(*f)) - *n = *n*10 + (*f++ - '0'); - } - else - *n = -1; - return t; -} - - -/* -** Read a variable. On error put nil on stack. -** LUA interface: -** variable = read ([format]) -** -** O formato pode ter um dos seguintes especificadores: -** -** s ou S -> para string -** f ou F, g ou G, e ou E -> para reais -** i ou I -> para inteiros -** -** Estes especificadores podem vir seguidos de numero que representa -** o numero de campos a serem lidos. -*/ - -static int read_until_char (int del) -{ - int c; - while((c = fgetc(in)) != EOF && c != del) - luaI_addchar(c); - return c; -} - -static void read_until_blank (void) -{ - int c; - while((c = fgetc(in)) != EOF && !isspace(c)) - luaI_addchar(c); - if (c != EOF) ungetc(c,in); -} - -static void read_m (int m) -{ - int c; - while (m-- && (c = fgetc(in)) != EOF) - luaI_addchar(c); -} - - -static void read_free (void) -{ - int c; - while (isspace(c=fgetc(in))) - ; - if (c == EOF) - { - lua_pushnil(); - return; - } - if (c == '\"' || c == '\'') - { /* string */ - c = read_until_char(c); - if (c == EOF) - lua_pushnil(); - else - lua_pushstring(luaI_addchar(0)); - } - else - { - double d; - char dummy; - char *s; - luaI_addchar(c); - read_until_blank(); - s = luaI_addchar(0); - if (sscanf(s, "%lf %c", &d, &dummy) == 1) - lua_pushnumber(d); - else - lua_pushstring(s); - } -} - -static void io_read (void) -{ - lua_Object o = lua_getparam (1); - luaI_addchar(0); /* initialize buffer */ - if (o == LUA_NOOBJECT) /* free format */ - read_free(); - else /* formatted */ - { - int m, dummy1, dummy2; - switch (getformat(lua_check_string(1, "read"), &dummy1, &m, &dummy2)) - { - case 's': - { - char *s; - if (m < 0) - read_until_blank(); - else - read_m(m); - s = luaI_addchar(0); - if ((m >= 0 && strlen(s) == m) || (m < 0 && strlen(s) > 0)) - lua_pushstring(s); - else - lua_pushnil(); - break; - } - - case 'i': /* can read as float, since it makes no difference to Lua */ - case 'f': - { - double d; - int result; - if (m < 0) - result = fscanf(in, "%lf", &d); - else - { - read_m(m); - result = sscanf(luaI_addchar(0), "%lf", &d); - } - if (result == 1) - lua_pushnumber(d); - else - lua_pushnil(); - break; - } - default: - lua_arg_error("read (format)"); - } - } -} - - -/* -** Read characters until a given one. The delimiter is not read. -*/ -static void io_readuntil (void) -{ - int del, c; - lua_Object p = lua_getparam(1); - luaI_addchar(0); /* initialize buffer */ - if (p == LUA_NOOBJECT || lua_isnil(p)) - del = EOF; - else - del = *lua_check_string(1, "readuntil"); - c = read_until_char(del); - if (c != EOF) ungetc(c,in); - lua_pushstring(luaI_addchar(0)); -} - - -/* -** Write a variable. On error put 0 on stack, otherwise put 1. -** LUA interface: -** status = write (variable [,format]) -** -** O formato pode ter um dos seguintes especificadores: -** -** s ou S -> para string -** f ou F, g ou G, e ou E -> para reais -** i ou I -> para inteiros -** -** Estes especificadores podem vir seguidos de: -** -** [?][m][.n] -** -** onde: -** ? -> indica justificacao -** < = esquerda -** | = centro -** > = direita (default) -** m -> numero maximo de campos (se exceder estoura) -** n -> indica precisao para -** reais -> numero de casas decimais -** inteiros -> numero minimo de digitos -** string -> nao se aplica -*/ - -static int write_fill (int n, int c) -{ - while (n--) - if (fputc(c, out) == EOF) - return 0; - return 1; -} - -static int write_string (char *s, int just, int m) -{ - int status; - int l = strlen(s); - int pre; /* number of blanks before string */ - if (m < 0) m = l; - else if (l > m) - { - write_fill(m, '*'); - return 0; - } - pre = (just == '<') ? 0 : (just == '>') ? m-l : (m-l)/2; - status = write_fill(pre, ' '); - status = status && fprintf(out, "%s", s) >= 0; - status = status && write_fill(m-(l+pre), ' '); - return status; -} - -static int write_quoted (int just, int m) -{ - luaI_addchar(0); - luaI_addquoted(lua_check_string(1, "write")); - return write_string(luaI_addchar(0), just, m); -} - -static int write_float (int just, int m, int n) -{ - char buffer[100]; - lua_Object p = lua_getparam(1); - float number; - if (!lua_isnumber(p)) return 0; - number = lua_getnumber(p); - if (n >= 0) - sprintf(buffer, "%.*f", n, number); - else - sprintf(buffer, "%g", number); - return write_string(buffer, just, m); -} - - -static int write_int (int just, int m, int n) -{ - char buffer[100]; - lua_Object p = lua_getparam(1); - int number; - if (!lua_isnumber(p)) return 0; - number = (int)lua_getnumber(p); - if (n >= 0) - sprintf(buffer, "%.*d", n, number); - else - sprintf(buffer, "%d", number); - return write_string(buffer, just, m); -} - - -static void io_write (void) -{ - int status = 0; - if (lua_getparam (2) == LUA_NOOBJECT) /* free format */ - { - lua_Object o1 = lua_getparam(1); - int t = lua_type(o1); - if (t == LUA_T_NUMBER) - status = fprintf (out, "%g", lua_getnumber(o1)) >= 0; - else if (t == LUA_T_STRING) - status = fprintf (out, "%s", lua_getstring(o1)) >= 0; - } - else /* formated */ - { - int just, m, n; - switch (getformat(lua_check_string(2, "write"), &just, &m, &n)) - { - case 's': - { - lua_Object p = lua_getparam(1); - if (lua_isstring(p)) - status = write_string(lua_getstring(p), just, m); - else - status = 0; - break; - } - case 'q': - status = write_quoted(just, m); - break; - case 'f': - status = write_float(just, m, n); - break; - case 'i': - status = write_int(just, m, n); - break; - } - } - if (status) - lua_pushnumber(status); - else - lua_pushnil(); -} - -/* -** Execute a executable program using "system". -** Return the result of execution. -*/ -static void io_execute (void) -{ - lua_pushnumber(system(lua_check_string(1, "execute"))); -} - -/* -** Remove a file. On error return nil. -*/ -static void io_remove (void) -{ - pushresult(remove(lua_check_string(1, "remove")) == 0); -} - -static void io_rename (void) -{ - char *f1 = lua_check_string(1, "rename"); - char *f2 = lua_check_string(2, "rename"); - pushresult(rename(f1, f2) == 0); -} - -static void io_tmpname (void) -{ - lua_pushstring(tmpnam(NULL)); -} - -static void io_errorno (void) -{ -/* lua_pushstring(strerror(errno));*/ -} - - -/* -** To get a environment variable -*/ -static void io_getenv (void) -{ - char *env = getenv(lua_check_string(1, "getenv")); - lua_pushstring(env); /* if NULL push nil */ -} - -/* -** Return user formatted time stamp -*/ -static void io_date (void) -{ - time_t t; - struct tm *tm; - char *s; - char b[BUFSIZ]; - if (lua_getparam(1) == LUA_NOOBJECT) - s = "%c"; - else - s = lua_check_string(1, "date"); - time(&t); tm = localtime(&t); - if (strftime(b,sizeof(b),s,tm)) - lua_pushstring(b); - else - lua_error("invalid `date' format"); -} - -/* -** To exit -*/ -static void io_exit (void) -{ - lua_Object o = lua_getparam(1); - int code = lua_isnumber(o) ? (int)lua_getnumber(o) : 1; - exit(code); -} - -/* -** To debug a lua program. Start a dialog with the user, interpreting - lua commands until an 'cont'. -*/ -static void io_debug (void) -{ - while (1) - { - char buffer[250]; - fprintf(stderr, "lua_debug> "); - if (fgets(buffer, sizeof(buffer), stdin) == 0) return; - if (strcmp(buffer, "cont") == 0) return; - lua_dostring(buffer); - } -} - - -static void lua_printstack (FILE *f) -{ - int level = 0; - lua_Object func; - fprintf(f, "Active Stack:\n"); - while ((func = lua_stackedfunction(level++)) != LUA_NOOBJECT) - { - char *name; - int currentline; - fprintf(f, "\t"); - switch (*lua_getobjname(func, &name)) - { - case 'g': - fprintf(f, "function %s", name); - break; - case 'f': - fprintf(f, "`%s' fallback", name); - break; - default: - { - char *filename; - int linedefined; - lua_funcinfo(func, &filename, &linedefined); - if (linedefined == 0) - fprintf(f, "main of %s", filename); - else if (linedefined < 0) - fprintf(f, "%s", filename); - else - fprintf(f, "function (%s:%d)", filename, linedefined); - } - } - if ((currentline = lua_currentline(func)) > 0) - fprintf(f, " at line %d", currentline); - fprintf(f, "\n"); - } -} - - -static void errorfb (void) -{ - lua_Object o = lua_getparam(1); - char *s = lua_isstring(o) ? lua_getstring(o) : "(no messsage)"; - fprintf(stderr, "lua: %s\n", s); - lua_printstack(stderr); -} - - -static struct lua_reg iolib[] = { -{"readfrom", io_readfrom}, -{"writeto", io_writeto}, -{"appendto", io_appendto}, -{"read", io_read}, -{"readuntil",io_readuntil}, -{"write", io_write}, -{"execute", io_execute}, -{"remove", io_remove}, -{"rename", io_rename}, -{"tmpname", io_tmpname}, -{"ioerror", io_errorno}, -{"getenv", io_getenv}, -{"date", io_date}, -{"exit", io_exit}, -{"debug", io_debug}, -{"print_stack", errorfb} -}; - -void iolib_open (void) -{ - luaI_openlib(iolib, (sizeof(iolib)/sizeof(iolib[0]))); - lua_setfallback("error", errorfb); -} |