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//------------------------------------------------------------------------------
// Headers
//------------------------------------------------------------------------------
#include <string.h>
#include <dbgu/dbgu.h>
#include <stdio.h>
#include "dfm_console.h"
#include "dfm_entry.h"
#include "dfm_cmd.h"
//------------------------------------------------------------------------------
// Internal variables
//------------------------------------------------------------------------------
///DBGU input buffer
static char gpConsoleBuffer[DBGU_CMDBUFSIZE];
///prompt refresh flag
static unsigned char gDBGUPromptFlag = 0;
///erase sequence
static char gpEraseSeq[] = "\b \b";
///used to expand TABS
static char gpTabSeq[] = " ";
//------------------------------------------------------------------------------
// Export variables
//------------------------------------------------------------------------------
// global DBGU entry
TInputEntry gDBGUEntry = \
{0, {NULL,NULL},DBGU_ShowPrompt, DBGU_CommandIsReady, DBGU_GetCommand, NULL};
//------------------------------------------------------------------------------
// Internal functions
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
/// output a string to console
/// \param pStr, string to output to DBGU console
//------------------------------------------------------------------------------
static inline void DBGU_puts(const char *pStr)
{
while(*pStr) {
DBGU_PutChar(*pStr++);
}
}
//------------------------------------------------------------------------------
/// remove charaters from buffer positions
//------------------------------------------------------------------------------
static char * DBGU_RemoveCharFromBuf (char *buffer, char *p, int *colp, int *np, int plen)
{
char *s;
if (*np == 0) {
return (p);
}
if (*(--p) == '\t') {
while (*colp > plen) {
DBGU_puts (gpEraseSeq);
(*colp)--;
}
for (s=buffer; s<p; ++s) {
if (*s == '\t') {
DBGU_puts (gpTabSeq+((*colp) & 07));
*colp += 8 - ((*colp) & 07);
} else {
++(*colp);
DBGU_PutChar (*s);
}
}
} else {
DBGU_puts (gpEraseSeq);
(*colp)--;
}
(*np)--;
return (p);
}
//------------------------------------------------------------------------------
/// Check console is ready?
/// \return 0 not ready, other value means ready and command string length
//------------------------------------------------------------------------------
unsigned int DBGU_CommandIsReady()
{
unsigned char c;
static char *p = gpConsoleBuffer;
int escflag = 0;
char * p_buf = gpConsoleBuffer;
static int n = 0; // buffer index
int plen = 0; // prompt length
static int col=0; // output column cnt
unsigned int cmdLen;
plen = strlen(GS_SHELL_PROMPT);
//right beginning of a new command input
if(col == 0)
col = plen;
Tag_for_CombinedKey:
if(DBGU_IsRxReady()) {
c = DBGU_GetChar();
//
// Special character handling
//
switch (c) {
case '\r': // Enter
case '\n':
*p = '\0';
cmdLen = p - p_buf;
p = gpConsoleBuffer;
n = 0; //clear buffer index as 0
col = 0; // this is set for indicate next time input considered as new command
gDBGUPromptFlag = 1;//DBGU_puts ("\r\n");
return cmdLen;
case '\0': // nul
return 0;
case 0x03: // ^C - break
//p_buf[0] = '\0'; // discard input
return 0;
case 0x15: // ^U - erase line
while (col > plen) {
DBGU_puts (gpEraseSeq);
--col;
}
p = p_buf;
n = 0;
return 0;
case 0x17: // ^W - erase word
p=DBGU_RemoveCharFromBuf(p_buf, p, &col, &n, plen);
while ((n > 0) && (*p != ' ')) {
p=DBGU_RemoveCharFromBuf(p_buf, p, &col, &n, plen);
}
return 0;
case 0x08: // ^H - backspace
case 0x7F: // DEL - backspace
p=DBGU_RemoveCharFromBuf(p_buf, p, &col, &n, plen);
return 0;
case 0x1b: // arrow, home flag
escflag = 1;
goto Tag_for_CombinedKey;//in window hyperterminal, arrow and home flag
// keys are combined 1b + x
case 'D': //ignore arrow,home key
case 'C':
case 'H':
case 'A':
case 'B':
if(escflag) {
escflag = 0;
return 0;
}
default:
//
// Must be a normal character then
//
if (n < DBGU_CMDBUFSIZE-2) {
if (c == '\t') { // expand TABs
DBGU_puts (gpTabSeq+(col&07));
col += 8 - (col&07);
} else {
++col; // echo input
DBGU_PutChar (c);
}
*p++ = c;
++n;
} else { // Buffer full
DBGU_PutChar ('\a');
}
}
}
return 0;
}
//------------------------------------------------------------------------------
/// get a const pointer to global console input buffer
/// \return pointer to global DBGU console input buffer
//------------------------------------------------------------------------------
const char * DBGU_GetCommand() {
return (const char *)gpConsoleBuffer;
}
//------------------------------------------------------------------------------
/// Show DBGU console prompt information
/// \return 0, success
//------------------------------------------------------------------------------
int DBGU_ShowPrompt()
{
#if defined(GS_SHELL_PROMPT)
// print prompt
if(gDBGUPromptFlag) {
DBGU_puts("\n\r");
DBGU_puts (GS_SHELL_PROMPT);
gDBGUPromptFlag = 0;
}
#endif
return 0;
}
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