CVS: libraries/commandline tabcomplete.c,NONE,1.1 commandline.c,1.2,1.3 makefile,1.2,1.3

Update of /cvsroot/mspgcc/libraries/commandline
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv20661/libraries/commandline

Modified Files:
	commandline.c makefile 
Added Files:
	tabcomplete.c 
Log Message:
add simple tab complete impl

--- NEW FILE: tabcomplete.c ---
#include <stdio.h>
#include <string.h>
#include <stdbool.h>

#include <mspgcc/util.h>
#include "commandline.h"

void commandline_tabcomplete(
    const COMMANDLINE_TABLE * commandline_table,
    LINEEDITOR_STATE *lineeditor,
    const char *prompt
) {
    // tab completion, scan for command starting with given text
    const COMMANDLINE_TABLE *match = NULL;
    unsigned int length = 0;
    bool append_space = false;
    // scan command table for a command that starts with the text from the current command line
    for (const COMMANDLINE_TABLE *entry=commandline_table; entry->name; entry++) {
        if (strncmp(lineeditor->line, entry->name, lineeditor->position) == 0) {
            if (match == NULL) {
                // save first match
                match = entry;
                length = strlen(entry->name);
                append_space = true;
            } else {
                // n'th match, find shortest common part
                while (length && strncmp(match->name, entry->name, length) != 0) {
                    length--;
                }
                append_space = false;
            }
        }
    }
    // print common part, update line buffer
    if (match != NULL && length > lineeditor->position) {
        const char *pos = &match->name[lineeditor->position];
        for (unsigned int chars = length - lineeditor->position; chars; chars--) {
            putchar(*pos++);
        }
        strncpy(lineeditor->line, match->name, length);
        lineeditor->position = length;
        lineeditor->line[lineeditor->position] = '\0';
        if (append_space) {
            putchar(' ');
            lineeditor->line[lineeditor->position++] = ' ';
            lineeditor->line[lineeditor->position] = '\0';
        }
    } else if (length >= lineeditor->position) {
        // print a list of possible values, then print the prompt and command line again
        printf("\n");
        for (const COMMANDLINE_TABLE *entry=commandline_table; entry->name; entry++) {
            if (strncmp(lineeditor->line, entry->name, lineeditor->position) == 0) {
                printf("%s ", entry->name);
            }
        }
        printf("\n%s%s", prompt, lineeditor->line);
    }
}

Index: commandline.c
===================================================================
RCS file: /cvsroot/mspgcc/libraries/commandline/commandline.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -w -d -r1.2 -r1.3
--- commandline.c	13 Sep 2005 12:25:15 -0000	1.2
+++ commandline.c	4 Apr 2006 22:25:05 -0000	1.3
@@ -31,7 +31,7 @@
             if (*ptr == ' ') {          // Space is the delimiter
                 *ptr = '\0';
                 if (argc >= MAXARGS) {
-                    //addidional args will get lost...
+                    //additional args will get lost...
                     break;
                 }
                 // skip whitespace

Index: makefile
===================================================================
RCS file: /cvsroot/mspgcc/libraries/commandline/makefile,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -w -d -r1.2 -r1.3
--- makefile	19 Sep 2005 09:28:58 -0000	1.2
+++ makefile	4 Apr 2006 22:25:05 -0000	1.3
@@ -2,7 +2,8 @@
 LIBRARYNAME     = commandline
 CSOURCES        = commandline.c commandline_number.c \
                   help.c reset.c checksum.c \
-                  memory_write.c memory_erase.c hexdump.c
+                  memory_write.c memory_erase.c hexdump.c \
+                  tabcomplete.c
 #~ ASOURCES        = 
 CPU             = msp1
 



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