One more command processing functions refactor, made command structure local

README.md

@@ -11,6 +11,7 @@ Work is still in porgress, buf when you will see a "finished" topic assigned to
 * Files and commands from `/usr/bin` autocompletion on `Tab` keypress
 * History of commands and navigation or search through it with `up/down` keys
 * Username, ip address and current path in prompt before each command input
+* Invert return status of command with `!`, separated with space, specified before it
 
 # Builtin commands
 * `cd`: changes current working directory to the one specified by user. If no arguments provided, shows error.

include/shell.h

@@ -41,24 +41,24 @@ struct history
     struct hist_sub sub;
 };
 
-struct command
+struct status
 {
-    char *line;
-    char **args;
-    bool pipes;
-};
-
-struct status {
     int s;
     bool invert;
 };
 
+typedef struct commands
+{
+    char **args;
+    struct status stat;
+    struct commands *next;
+} * cmds_p;
+
 typedef struct
 {
     struct history hist;
     char **envs;
-    struct command com;
-    struct status status;
+    int last_status;
 } t_;
 
 //Globals defenition
@@ -66,10 +66,10 @@ extern t_ term;
 extern char *builtin[];
 
 // Functions prototypes
-int process_line(char *line, char ***args);
+int process_line(char *line, cmds_p *coms);
 int launch(char **args);
 void process_command();
-int execute(char **args);
+int execute(cmds_p command);
 
 void sig_handler();
 

include/utils.h

@@ -18,9 +18,10 @@
 void append_to_pos(char **str, int pos, char ch);
 void remove_on_pos(char **str, int pos);
 int sep_string(char *line, char ***toks, char *sep);
-char *trim_string(char **str);
+char *trim_string(char **str, bool leave_trailing_space);
 void free_str_arr(char **arr);
 char **slice_array(char **arr, int beg, int end, bool asc);
 int get_null_term_arr_size(char **arr);
+int append_to_str_arr(char ***arr, int *sz, char *str);
 
 #endif

src/keys.c

@@ -268,7 +268,7 @@ void tab_key(int *pos, int *n, char **line)
     (*line)[*pos] = '\0';
     *line = realloc(*line, strlen(*line) + 1);
 
-    *line = trim_string(line);
+    *line = trim_string(line, true);
     *pos = strlen(*line);
     *n = *pos;
 

src/main.c

@@ -48,10 +48,7 @@ t_ init_term()
     term.hist.sub.pos = -1;
     term.hist.sub.content = (char **)malloc(sizeof(char *) * 0);
 
-    term.status.s = 0;
-    term.status.invert = 0;
-
-    term.com.line = NULL;
+    term.last_status = 0;
 
     signal(SIGINT, SIG_IGN);
 

src/shell.c

@@ -19,45 +19,26 @@ int (*builtin_func[])(char **) = {
  */
 void process_command()
 {
-    char **args = NULL;
+    cmds_p coms = NULL;
 
     char *prompt = compose_prompt();
     print_str(prompt, strlen(prompt));
 
     char *line = read_line();
+    line = trim_string(&line, false);
 
-    line = trim_string(&line);
-    if (line[strlen(line) - 1] == ' ')
-        remove_on_pos(&line, strlen(line));
+    process_line(line, &coms);
 
-    term.com.line = line;
-
-    process_line(line, &args);
-
-    if (args[0] != NULL)
-        if (strcmp(args[0], "!") == 0)
-        {
-            term.status.invert = true;
-            args = slice_array(args, 1, -1, true);
-        }
-
-    int status = execute(args);
-
-    if (term.status.invert)
+    cmds_p curr = coms;
+    int status = 0;
+    while (curr != NULL)
     {
-        if (status == 0)
-            term.status.s = 1;
-        else
-            term.status.s = 0;
-
-        term.status.invert = false;
+        status = execute(curr);
+        curr = curr->next;
     }
-    else
-        term.status.s = status;
 
     free(line);
     free(prompt);
-    free_str_arr(args);
 }
 
 /**
@@ -66,60 +47,50 @@ void process_command()
  * @param line 
  * @param args 
  */
-int process_line(char *line, char ***args)
+int process_line(char *line, cmds_p *coms)
 {
-    int buff_size = ARG_SIZE, pos = 0;
-    *args = malloc(buff_size * sizeof(char *));
-
-    for (int i = 0; i < buff_size; i++)
-    {
-        (*args)[i] = NULL;
-    }
-
     char *tmp = strdup(line), *free_tmp = tmp;
+    int args_am = 0;
+
+    *coms = malloc(sizeof(cmds_p));
+    (*coms)->args = malloc(sizeof(char *) * args_am);
+    (*coms)->stat.s = 0;
+    (*coms)->stat.invert = false;
+    (*coms)->next = NULL;
 
     for (int i = 0; i < strlen(line); i++)
     {
         if (line[i] == ' ')
         {
             tmp[i] = '\0';
-            (*args)[pos] = strdup(tmp);
-            tmp += strlen((*args)[pos]) + 1;
-            pos++;
+
+            append_to_str_arr(&((*coms)->args), &args_am, tmp);
+
+            tmp += strlen((*coms)->args[args_am - 1]) + 1;
         }
         else if (line[i] == '#')
         {
             break;
         }
-
-        if (pos > buff_size)
-        {
-            buff_size += ARG_SIZE;
-            *args = realloc(*args, buff_size * sizeof(char *));
-            if (*args == NULL)
-            {
-                fprintf(stderr, "myshell: memory allocation error");
-                exit(EXIT_FAILURE);
-            }
-        }
     }
 
     if (tmp[0] != '\0' && tmp[0] != '#')
     {
-        (*args)[pos] = strdup(tmp);
-        pos++;
+        append_to_str_arr(&((*coms)->args), &args_am, tmp);
     }
 
-    if ((*args)[0] == NULL && line[0] != '#' && line[0] != '\0')
+    if ((*coms)->args[0] != NULL)
     {
-        (*args)[0] = strdup(line);
-        pos++;
+        if (strcmp((*coms)->args[0], "!") == 0)
+        {
+            (*coms)->stat.invert = true;
+        }
     }
 
     free(free_tmp);
 
-    (*args)[pos] = NULL;
-    return pos;
+    (*coms)->args[args_am] = NULL;
+    return args_am;
 }
 
 /**
@@ -128,16 +99,16 @@ int process_line(char *line, char ***args)
  * @param args 
  * @return int 
  */
-int execute(char **args)
+int execute(cmds_p command)
 {
-    if (args[0] == NULL)
+    if (command->args[0] == NULL)
         return 1;
 
     for (int i = 0; i < BUILTIN_NUM; i++)
-        if (strcmp(args[0], builtin[i]) == 0)
-            return (*builtin_func[i])(args);
+        if (strcmp(command->args[0], builtin[i]) == 0)
+            return (*builtin_func[i])(command->args);
 
-    return launch(args);
+    return launch(command->args);
 }
 
 /**
@@ -283,10 +254,10 @@ char *compose_prompt()
     free(full_path);
 
     // Previous status
-    if (term.status.s != 0)
+    if (term.last_status != 0)
     {
-        char *status = malloc(snprintf(NULL, 0, " \033[91m%d\033[39m", term.status.s));
-        sprintf(status, " \033[91m%d\033[39m", term.status.s);
+        char *status = malloc(snprintf(NULL, 0, " \033[91m%d\033[39m", term.last_status));
+        sprintf(status, " \033[91m%d\033[39m", term.last_status);
         prompt = realloc(prompt, strlen(prompt) + strlen(status) + 1);
         prompt = strcat(prompt, status);
         free(status);

src/utils.c

@@ -77,7 +77,7 @@ int sep_string(char *line, char ***toks, char *sep)
  * @param str 
  * @return char* 
  */
-char *trim_string(char **str)
+char *trim_string(char **str, bool leave_trailing_space)
 {
     while ((*str)[0] == ' ')
         remove_on_pos(str, 1);
@@ -88,6 +88,10 @@ char *trim_string(char **str)
             remove_on_pos(str, i);
             i--;
         }
+    
+    if (!leave_trailing_space)
+        if ((*str)[strlen(*str) - 1] == ' ' && (*str)[strlen(*str) - 2] == ' ')
+            remove_on_pos(str, strlen(*str) - 1);
 
     return *str;
 }
@@ -146,4 +150,21 @@ int get_null_term_arr_size(char **arr)
         k++;
 
     return k;
+}
+
+int append_to_str_arr(char ***arr, int *sz, char *str)
+{
+    (*sz)++;
+
+    char **tmp = realloc(*arr, sizeof(char *) * *sz);
+    if (tmp == NULL)
+    {
+        fprintf(stderr, "Couldn't reallocate memory\n");
+        return -1;
+    }
+    *arr = tmp;
+
+    (*arr)[*sz - 1] = strdup(str);
+
+    return 0;
 }