Call this v0.4.0

Makefile

@@ -2,7 +2,7 @@
 # (C) Copyright 2014-2021 Chris Dorman, some rights reserved (GPLv2)
 # Some changes and tweaks from Menchers
 
-VERSION       = \"0.3.3\"
+VERSION       = \"0.4.0\"
 VERSION_EXTRA = \"$(EXTRA)\"
 
 PREFIX ?= /usr
@@ -13,7 +13,7 @@ CPPFLAGS     += -DVERSION=$(VERSION) -D_FORTIFY_SOURCE=2
 LDFLAGS      += -Wl,-O1,--sort-common,--hash-style=gnu,-z,relro
 BIN          ?= slidescript
 
-OBJECTS = src/main.o src/functions.o src/util.o src/vars.o src/enc.o src/md5.o src/pipe.o src/network.o
+OBJECTS = src/main.o src/functions.o src/util.o src/vars.o src/enc.o src/md5.o src/pipe.o src/network.o src/math.o
 
 all: main
 

README.md

@@ -10,6 +10,7 @@ Using SlideScript
 * Modify test.ss to learn the basics of SS.
 * Run ./test.ss to execute the script.
 
+
 ***NOTE: if compiling on OSX/BSD, please uncomment #define BSD in src/config.h***
 
 Documentation
@@ -24,6 +25,10 @@ at this moment!
    * `write "file.txt" "This will be written to file.txt"`
    * `read "file.txt"`
 
+* Basic math expressions
+   * `calc "45 / 5"` or `calc "255.3 * 442.77"`
+   * Of course addition and subtraction as well!
+
 * Delete example:
    * `delete "file.txt"`
 
@@ -48,8 +53,8 @@ at this moment!
 * MD5 file checking
    * `md5 "file.txt"` -> outputs filename and md5 hash
 
- * 2 Layer piping
-   * `md5 "file.txt" | write "file.txt.md5" "%PIPE%"` -> writes output of md5 to file.txt.md5
+* Layered piping
+   * `md5 "file.txt" | encrypt "%PIPE"  | write "file.txt.md5.enc" "%PIPE%"` -> writes output of md5 to file.txt.md5
 
 * Networking functions
    * `netlisten "<port>" "<search>" "<respond>"` -> listens on <port> and replies <respond> on <search> found from outside
@@ -57,19 +62,24 @@ at this moment!
    * `nethttp "<port>" "<forkval>"` -> throws up a web server on <port> in the current working directory, 
      forkval (0 or 1, 0 don't fork into background / 1 do).
 
+
+
 This will change rapidly as of currently, slidescript is in beavy development!
 
 
 Todo list
 -----
+
 * Add in-script functions
 * New static functions
 * Loops, and if statements
 
+
 Done
 -----
+
 * Simple syntax checking and error reporting 
- * 2 layer function piping
+* Up to 32 layer function piping
 * Support for linux system calls
 * Network listen socket, toss function
 * Builtin HTTP server for disposeable use, can be ran in the foreground or forked into the background 
@@ -78,19 +88,27 @@ Done
 * Shebang handling
 * Variable support
 
+
 Changelog
 -----
+* V0.4.0
+   * Added calc function for floating math equations
+   * Cleaned up some more syntax handling, as well as bugs
+   * Added structured and savable multi-layer piping up to 32 functions deep
+
 * V0.3.3
    * Added first networking functions: netlisten, nettoss, nethttp.
    * Embedded web server functionality
    * Cleaned up code
    * Improved syntax handling on functions
+
 * V0.3.0
    * Added simple 2 layer function piping for more useful tasks
    * Fixed a couple core dump bugs
    * Now reads files into memory, and then forces text files through SS, allows for in file variables
    * Added "md5" functionality
    * Multi-formal working syntax
+
 * V0.2.1
    * Added "decrypt" decode function
    * Added "encrypt" encode function

examples/net-listen.ss

@@ -1,6 +1,6 @@
 #!/usr/bin/slidescript
 
-port=2001
+port=2020
 search=hi
 respond=bye
 

examples/net-toss.ss

@@ -1,13 +1,13 @@
 #!/usr/bin/slidescript
 
 address=127.0.0.1
-port=2001
+port=2020
 data1=This data is gonna be pushed to the server side host!
 data2=Here's the second set of data getting tossed to the server
 data3=Of course, do a little more considering the transfer is instant!
 
 nettoss "%address%" "%port%" "%data1%"
 nettoss "%address%" "%port%" "%data2%"
-nettoss "%address%" "%port%" "%data3%"
+encode "%data3%" | nettoss "%address%" "%port%" "%PIPE%"
 
 nettoss "%address%" "%port%" "hi"

src/deps.h

@@ -9,9 +9,13 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <time.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <signal.h>
+#include <regex.h>
+#include <limits.h>
+#include <stddef.h>
 #include "config.h"
 #include "sbyteswap.h"
 #include <sys/types.h>
@@ -26,7 +30,9 @@
 #define MAX_STRING_LEN          4096
 #define MAX_STRING_BUFSIZE      (MAX_STRING_LEN + 1)
 #define MAX_VAR_DATA_LEN 	    65536
+#define MAX_DATA_BUFSIZE        (MAX_VAR_DATA_LEN + 1)
 #define MAXVARS          	    1488
+#define MAX_PIPE_CMDS           32
 #define MAX_CONCAT_BUF          131072
 #define MAX_READFILE_LEN        2097152
 // for networking functions
@@ -36,6 +42,9 @@
 #define MAX_NETSRCH_BUF         (MAX_NETSRCH_LEN + 1)
 #define MAX_NETRESP_LEN         65536
 #define MAX_NETRESP_BUF         (MAX_NETRESP_BUF + 1)
+// For Expr
+#define MAX_EXPR_ARGS           128
+#define MAX_EXPR_LEN            512
 // END
 #define TOKEN             	    '%'
 #define TOKEN_STR         	    "%"

src/functions.c

@@ -10,6 +10,7 @@
 #include "util.h"
 #include "vars.h"
 #include "enc.h"
+#include "math.h"
 #include "md5.h"
 #include "network.h"
 
@@ -37,6 +38,15 @@ char *process_line(char *line)
     if(strncmp("exit", tok_srch, 4) == 0)
         syn_error("ss:exit called");
 
+    /* time function */
+    /* print function */
+    else if(strncmp("time",tok_srch,4) == 0)
+    {
+        char *parsed;
+        parsed = ss_time();
+        return strip_nl(parsed);
+    }
+
     /* print function */
     else if(strncmp("print",tok_srch,5) == 0)
     {
@@ -78,6 +88,25 @@ char *process_line(char *line)
         return NULL;
     }
 
+    // Calc function, some math involved! //
+    else if(strncmp("calc",tok_srch,5) == 0)
+    {
+        char *expr_return;
+        tok_srch = strtok(NULL, "\"");
+        if(tok_srch == NULL)
+            syn_error("ss:error:calc syntax error, missing quotes around equation?");
+
+        if(strcmp(tok_srch, "\n") == 0  || strcmp(tok_srch, " \n") == 0)
+            syn_error("ss:error:calc syntax error, missing quotes around equation?");
+
+        if(strtok(NULL, "\"") == NULL)
+            syn_error("ss:error:calc missing end quote");
+
+        expr_return = ss_expr(tok_srch);
+        
+        return expr_return;
+    }
+
     /* Networking, listen */
     else if(strncmp("netlisten",tok_srch,9) == 0)
     {

src/main.c

@@ -41,34 +41,36 @@ int main(int argc, char **argv)
 		/* parse each line from the script in order. */
 		while(fgets(script_line, sizeof(script_line), script) != NULL) 
 		{
-            char *return_dat, *pipechk, *return_pipe_dat;
-            pipechk = ss_piping(script_line);
+            char *return_dat;
+            int pipechk;
+            ss_piping(script_line);
 
-    	    return_dat = process_line(script_line);
+            pipechk = get_cmd_count();
+
+    	    return_dat = process_line(spipe[0].command);
 
             // Blank line, getting up outta here.
             if(return_dat == NULL) continue;
 
-            if(pipechk != NULL)
-            {
-                int varc;
+            int varc, ii;
             varc = get_var_count();
+            if(pipechk > 1)
+            {
+                for(ii = 1; ii < pipechk; ii++)
+                {
                     set_var(varc, "PIPE", return_dat);
                     // Process functions based on previous pipe return
-                return_pipe_dat = process_line(pipechk);
+                    return_dat = process_line(spipe[ii].command);
                     // set PIPE var back to NULL after use, keep the struct clean
                     set_var(varc, "\0", "\0");
                     // Check to see if there's anything to even display
-                if(return_pipe_dat == NULL) continue;
+                    if(return_dat == NULL) break;
+                }
+            }
 
             // Print the pipe line
-                printf("%s\n", return_pipe_dat);
-            }
-            else
-            {
-                // If return is not null, and no pipe; provide the return
+            if(return_dat != NULL)
                 printf("%s\n", return_dat);
-            }
 		} /* end of while */
 	} /* file null */
 		

src/math.c

@@ -0,0 +1,90 @@
+// expr.c, from suckless sbase. 
+#include "deps.h"
+#include "math.h"
+#include "util.h"
+
+static char expr_out[(MAX_EXPR_LEN*2)+1];
+
+int get_expr_count()
+{
+    int yy;
+    for(yy = 0; yy < MAX_EXPR_ARGS; yy++)
+    {
+        if(strlen(sexpr[yy].arg) > 0)
+        {
+            continue;
+        }
+        else
+        {
+            return yy;
+        }
+    }
+    return 0;
+}
+
+void set_expr_arg(int index, char *arg)
+{
+    strcpy(sexpr[index].arg, arg);
+}
+
+// Main expr function
+char *ss_expr(char *string)
+{
+    char *expr_tok, *f_end, *s_end, *calc_operator;
+    int expr_argc, n;
+    float first, second, finalf;
+
+    expr_tok = strtok(string, " ");
+    if(expr_tok == NULL)
+        syn_error("ss:error:calc missing equation");
+
+    // Clear arguments from previous calculations.
+    for(int ff = 0; ff < MAX_EXPR_ARGS; ff++) bzero(sexpr[ff].arg, MAX_EXPR_LEN);
+
+    // Set initial argument
+    set_expr_arg(0, expr_tok);
+
+    // Write new arguments
+    n = 1;
+    while((expr_tok = strtok(NULL, " ")) != NULL)
+    {
+        if(n > 3) syn_error("ss:error:calc recieved too many arguments");;
+        int argc = get_expr_count();
+        set_expr_arg(argc, expr_tok);
+        n++;
+    }
+
+    // Check routine to make sure we're doing simple math xD
+    expr_argc = get_expr_count();
+
+    if(expr_argc > 3)
+        syn_error("ss:error:calc only supports dual values (3 * 14)");
+
+    first = strtof(sexpr[0].arg, &f_end);
+    calc_operator = sexpr[1].arg;
+    second = strtof(sexpr[2].arg, &s_end);
+
+    switch (calc_operator[0]) {
+        case '+':
+            finalf = first + second;
+            break;
+        case '-':
+            finalf = first - second;
+            break;
+        case '*':
+            finalf = first * second;
+            break;
+        case '/':
+            finalf = first / second;
+            break;
+            // operator doesn't match any case constant
+        default:
+            finalf = 0;
+            syn_error("ss:error:calc operator not supported");
+    }
+
+    if(gcvt(finalf, 12, expr_out)==NULL)
+        syn_error("ss:error:calc illegal instruction");
+
+    return expr_out;
+}

src/math.h

@@ -0,0 +1,11 @@
+// For SS
+struct s_expr
+{
+    char arg[MAX_EXPR_LEN+1];
+};
+
+typedef struct s_expr EXPR;
+EXPR sexpr [MAX_EXPR_ARGS];
+
+void set_expr_arg(int index, char *arg);
+char *ss_expr(char *string);

src/pipe.c

@@ -7,10 +7,33 @@
 
 
 #include "deps.h"
+#include "vars.h"
 #include "pipe.h"
 #include "util.h"
 
-char *ss_piping(char *string)
+void set_cmd(int index, char *cmd)
+{
+    strcpy(spipe[index].command, cmd);
+}
+
+int get_cmd_count()
+{
+    int yy;
+    for(yy = 0; yy < MAX_PIPE_CMDS; yy++)
+    {
+        if(strlen(spipe[yy].command) > 0)
+        {
+            continue;
+        }
+        else
+        {
+            return yy;
+        }
+    }
+    return 0;
+}
+
+void ss_piping(char *string)
 {
     char *pipe_tok;
 
@@ -22,15 +45,20 @@ char *ss_piping(char *string)
     sprintf(stringmem, "%s", string);
 
     pipe_tok = strtok(stringmem, "|");
-    if(pipe_tok != NULL && strcmp(pipe_tok, string) !=0)
+    if(pipe_tok == NULL)
     {
-        char *second_func;
-        pipe_tok = strtok(NULL, "|");
-        second_func = pipe_tok + 1;
-        return second_func;
+        set_cmd(0, string);
+    }
+    else
+    {
+        set_cmd(0, pipe_tok);
+    }
+
+    while((pipe_tok = strtok(NULL, "|")) != NULL)
+    {
+        int cmdc = get_cmd_count();
+        set_cmd(cmdc, pipe_tok);
     }
 
     free(stringmem);
-
-    return NULL;
 }

src/pipe.h

@@ -6,4 +6,15 @@
 */
 
 
-char *ss_piping(char *string);
+
+struct s_cmds
+{
+    char command [MAX_STRING_BUFSIZE];
+};
+
+typedef struct s_cmds CMDS;
+MY_GLOBAL CMDS spipe [MAX_PIPE_CMDS];
+
+void set_cmd(int index, char *cmd);
+int get_cmd_count();
+void ss_piping(char *string);

src/util.c

@@ -78,3 +78,9 @@ void parse_args(int argc, char** argv)
 	
 }
 
+char *ss_time()
+{
+    time(&current_time);
+
+    return ctime(&current_time);
+}

src/util.h

@@ -5,9 +5,12 @@
     View README file supplied with this software for more details
 */
 
+time_t current_time;
+
 void syn_error(char *message);
 char *strip_nl(char *string);
 int file_exists(char *path);
 int is_dir(char *path);
 char *ss_concat(char *str1, char *str2);
 void parse_args(int argc, char** argv);
+char *ss_time();