Changeset e14a103 in mainline for uspace/app/bdsh/compl.c

Timestamp:

2011-08-19T18:24:23Z (13 years ago)

Author:

Martin Sucha <sucha14@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

be61b8f

Parents:

5992e0e

Message:

Use tokenizer in bdsh completion

File:

• uspace/app/bdsh/compl.c (modified) (10 diffs)

uspace/app/bdsh/compl.c

@@ -1 +1 @@
 /*
  * Copyright (c) 2011 Jiri Svoboda
+ * Copyright (c) 2011 Martin Sucha
  * All rights reserved.
  *
@@ -37 +38 @@
 #include "compl.h"
 #include "exec.h"
+#include "tok.h"
 
 static int compl_init(wchar_t *text, size_t pos, size_t *cstart, void **state);
@@ -88 +90 @@
 {
         compl_t *cs = NULL;
-        size_t p;
         size_t pref_size;
         char *stext = NULL;
@@ -96 +97 @@
         static const char *dirlist_arg[] = { ".", NULL };
         int retval;
+        tokenizer_t tok;
+        token_t tokens[WORD_MAX];
+        unsigned int current_token;
+        size_t tokens_length;
 
         cs = calloc(1, sizeof(compl_t));
@@ -103 +108 @@
         }
 
-        /*
-         * Copy token pointed to by caret from start up to the caret.
-         * XXX Ideally we would use the standard tokenizer.
-         */
-        p = pos;
-        while (p > 0 && text[p - 1] != (wchar_t) ' ')
-                --p;
-        *cstart = p;
-
         /* Convert text buffer to string */
-        stext = wstr_to_astr(text + *cstart);
+        stext = wstr_to_astr(text);
         if (stext == NULL) {
                 retval = ENOMEM;
                 goto error;
         }
-
-        /* Extract the prefix being completed */
+        
+        /* Tokenize the input string */
+        retval = tok_init(&tok, stext, tokens, WORD_MAX);
+        if (retval != EOK) {
+                goto error;
+        }
+        
+        retval = tok_tokenize(&tok, &tokens_length);
+        if (retval != EOK) {
+                goto error;
+        }
+        
+        /* Find the current token */
+        for (current_token = 0; current_token < tokens_length; current_token++) {
+                token_t *t = &tokens[current_token];
+                size_t end = t->char_start + t->char_length;
+                /* Check if the caret lies inside the token or immediately
+                 * after it
+                 */
+                if (t->char_start <= pos && pos <= end) {
+                        break;
+                }
+        }
+        
+        if (tokens[current_token].type != TOKTYPE_SPACE) {
+                *cstart = tokens[current_token].char_start;
+        }
+        else {
+                *cstart = pos;
+        }
+        
+        /* Extract the prefix being completed
+         * XXX: handle strings, etc.
+         */
         pref_size = str_lsize(stext, pos - *cstart);
         prefix = malloc(pref_size + 1);
@@ -127 +155 @@
         }
 
-        str_ncpy(prefix, pref_size + 1, stext, pref_size);
+        str_ncpy(prefix, pref_size + 1, stext +
+            tokens[current_token].byte_start, pref_size);
 
         /*
@@ -133 +162 @@
          * We look at the previous token. If there is none or it is a pipe
          * ('|'), it is a command, otherwise it is an argument.
-         * XXX Again we should use the standard tokenizer/parser.
          */
 
         /* Skip any whitespace before current token */
-        while (p > 0 && text[p - 1] == (wchar_t) ' ')
-                --p;
+        int prev_token = current_token - 1;
+        if (prev_token != -1 && tokens[prev_token].type == TOKTYPE_SPACE) {
+                prev_token--;
+        }
 
         /*
@@ -144 +174 @@
          * follows a pipe token.
          */
-        if (p == 0 || text[p - 1] == '|')
+        if (prev_token == -1 || tokens[prev_token].type == TOKTYPE_SPACE)
                 cs->is_command = true;
         else
@@ -189 +219 @@
 
         cs->prefix_len = str_length(cs->prefix);
+        
+        tok_fini(&tok);
 
         *state = cs;
@@ -195 +227 @@
 error:
         /* Error cleanup */
+        
+        tok_fini(&tok);
 
         if (cs != NULL && cs->path_list != NULL) {