mirror of
https://github.com/cesanta/mongoose.git
synced 2024-12-20 04:28:13 +08:00
eaef5bd133
This reverts commit 1a17e17c462bdd4e1d26d8742f8b7087273e04c2. PUBLISHED_FROM=80028de308c9a021955d1425d2bfee8feb85f193
445 lines
12 KiB
C
445 lines
12 KiB
C
/* clang-format off */
|
|
/*********************************************************************
|
|
* SEGGER MICROCONTROLLER GmbH & Co. KG *
|
|
* Solutions for real time microcontroller applications *
|
|
**********************************************************************
|
|
* *
|
|
* (c) 2014-2014 SEGGER Microcontroller GmbH & Co. KG *
|
|
* *
|
|
* Internet: www.segger.com Support: support@segger.com *
|
|
* *
|
|
**********************************************************************
|
|
----------------------------------------------------------------------
|
|
File : SEGGER_RTT_printf.c
|
|
Date : 17 Dec 2014
|
|
Purpose : Replacement for printf to write formatted data via RTT
|
|
---------------------------END-OF-HEADER------------------------------
|
|
*/
|
|
#include "SEGGER_RTT.h"
|
|
#include "SEGGER_RTT_Conf.h"
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Defines, configurable
|
|
*
|
|
**********************************************************************
|
|
*/
|
|
|
|
#ifndef SEGGER_RTT_PRINTF_BUFFER_SIZE
|
|
#define SEGGER_RTT_PRINTF_BUFFER_SIZE (64)
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
|
|
|
|
#define FORMAT_FLAG_LEFT_JUSTIFY (1 << 0)
|
|
#define FORMAT_FLAG_PAD_ZERO (1 << 1)
|
|
#define FORMAT_FLAG_PRINT_SIGN (1 << 2)
|
|
#define FORMAT_FLAG_ALTERNATE (1 << 3)
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Types
|
|
*
|
|
**********************************************************************
|
|
*/
|
|
|
|
typedef struct {
|
|
char* pBuffer;
|
|
int BufferSize;
|
|
int Cnt;
|
|
|
|
int ReturnValue;
|
|
|
|
unsigned RTTBufferIndex;
|
|
} SEGGER_RTT_PRINTF_DESC;
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Function prototypes
|
|
*
|
|
**********************************************************************
|
|
*/
|
|
int SEGGER_RTT_vprintf(unsigned BufferIndex, const char * sFormat, va_list * pParamList);
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Static code
|
|
*
|
|
**********************************************************************
|
|
*/
|
|
/*********************************************************************
|
|
*
|
|
* _StoreChar
|
|
*/
|
|
static void _StoreChar(SEGGER_RTT_PRINTF_DESC * p, char c) {
|
|
int Cnt;
|
|
|
|
Cnt = p->Cnt;
|
|
if ((Cnt + 1) <= p->BufferSize) {
|
|
*(p->pBuffer + Cnt) = c;
|
|
p->Cnt = Cnt + 1;
|
|
p->ReturnValue++;
|
|
}
|
|
//
|
|
// Write part of string, when the buffer is full
|
|
//
|
|
if (p->Cnt == p->BufferSize) {
|
|
if (SEGGER_RTT_Write(p->RTTBufferIndex, p->pBuffer, p->Cnt) != p->Cnt) {
|
|
p->ReturnValue = -1;
|
|
} else {
|
|
p->Cnt = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* _PrintUnsigned
|
|
*/
|
|
static void _PrintUnsigned(SEGGER_RTT_PRINTF_DESC * pBufferDesc, unsigned v, unsigned Base, int NumDigits, unsigned FieldWidth, unsigned FormatFlags) {
|
|
static const char _aV2C[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
|
|
unsigned Div;
|
|
unsigned Digit = 1;
|
|
unsigned Number;
|
|
unsigned Width;
|
|
char c;
|
|
|
|
Number = v;
|
|
|
|
//
|
|
// Get actual field width
|
|
//
|
|
Width = 1;
|
|
while (Number >= Base) {
|
|
Number = (Number / Base);
|
|
Width++;
|
|
}
|
|
if ((unsigned)NumDigits > Width) {
|
|
Width = NumDigits;
|
|
}
|
|
//
|
|
// Print leading chars if necessary
|
|
//
|
|
if ((FormatFlags & FORMAT_FLAG_LEFT_JUSTIFY) == 0) {
|
|
if (FieldWidth != 0) {
|
|
if (((FormatFlags & FORMAT_FLAG_PAD_ZERO) == FORMAT_FLAG_PAD_ZERO) && (NumDigits == 0)) {
|
|
c = '0';
|
|
} else {
|
|
c = ' ';
|
|
}
|
|
while ((FieldWidth != 0) && (Width < FieldWidth--)) {
|
|
_StoreChar(pBufferDesc, c);
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// Count how many digits are required by precision
|
|
//
|
|
while (((v / Digit) >= Base) | (NumDigits-- > 1)) {
|
|
Digit *= Base;
|
|
}
|
|
//
|
|
// Output digits
|
|
//
|
|
do {
|
|
Div = v / Digit;
|
|
v -= Div * Digit;
|
|
_StoreChar(pBufferDesc, _aV2C[Div]);
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
break;
|
|
}
|
|
Digit /= Base;
|
|
} while (Digit);
|
|
//
|
|
// Print trailing spaces if necessary
|
|
//
|
|
if ((FormatFlags & FORMAT_FLAG_LEFT_JUSTIFY) == FORMAT_FLAG_LEFT_JUSTIFY) {
|
|
if (FieldWidth != 0) {
|
|
while ((FieldWidth != 0) && (Width < FieldWidth--)) {
|
|
_StoreChar(pBufferDesc, ' ');
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* _PrintInt
|
|
*/
|
|
static void _PrintInt(SEGGER_RTT_PRINTF_DESC * pBufferDesc, int v, unsigned Base, unsigned NumDigits, unsigned FieldWidth, unsigned FormatFlags) {
|
|
unsigned Width;
|
|
unsigned Number;
|
|
|
|
Number = (v < 0) ? -v : v;
|
|
|
|
//
|
|
// Get actual field width
|
|
//
|
|
Width = 1;
|
|
while (Number >= Base) {
|
|
Number = (Number / Base);
|
|
Width++;
|
|
}
|
|
if (NumDigits > Width) {
|
|
Width = NumDigits;
|
|
}
|
|
if ((FieldWidth > 0) && ((v < 0) || ((FormatFlags & FORMAT_FLAG_PRINT_SIGN) == FORMAT_FLAG_PRINT_SIGN))) {
|
|
FieldWidth--;
|
|
}
|
|
|
|
//
|
|
// Print leading spaces if necessary
|
|
//
|
|
if ((((FormatFlags & FORMAT_FLAG_PAD_ZERO) == 0) || (NumDigits != 0)) && ((FormatFlags & FORMAT_FLAG_LEFT_JUSTIFY) == 0)) {
|
|
if (FieldWidth != 0) {
|
|
while ((FieldWidth != 0) && (Width < FieldWidth--)) {
|
|
_StoreChar(pBufferDesc, ' ');
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// Print sign if necessary
|
|
//
|
|
if (v < 0) {
|
|
v = -v;
|
|
_StoreChar(pBufferDesc, '-');
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
return;
|
|
}
|
|
} else if ((FormatFlags & FORMAT_FLAG_PRINT_SIGN) == FORMAT_FLAG_PRINT_SIGN) {
|
|
_StoreChar(pBufferDesc, '+');
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
return;
|
|
}
|
|
}
|
|
//
|
|
// Print leading zeros if necessary
|
|
//
|
|
if (((FormatFlags & FORMAT_FLAG_PAD_ZERO) == FORMAT_FLAG_PAD_ZERO) && ((FormatFlags & FORMAT_FLAG_LEFT_JUSTIFY) == 0) && (NumDigits == 0)) {
|
|
if (FieldWidth != 0) {
|
|
while ((FieldWidth != 0) && (Width < FieldWidth--)) {
|
|
_StoreChar(pBufferDesc, '0');
|
|
if (pBufferDesc->ReturnValue < 0) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Print number without sign
|
|
//
|
|
_PrintUnsigned(pBufferDesc, v, Base, NumDigits, FieldWidth, FormatFlags);
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* Public code
|
|
*
|
|
**********************************************************************
|
|
*/
|
|
/*********************************************************************
|
|
*
|
|
* SEGGER_RTT_vprintf
|
|
*
|
|
* Function description
|
|
* Stores a formatted string in SEGGER RTT control block.
|
|
* This data is read by the host.
|
|
*
|
|
* Parameters
|
|
* BufferIndex Index of "Up"-buffer to be used. (e.g. 0 for "Terminal")
|
|
* sFormat Pointer to format string
|
|
* pParamList Pointer to the list of arguments for the format string
|
|
*
|
|
* Return values
|
|
* >= 0: Number of bytes which have been stored in the "Up"-buffer.
|
|
* < 0: Error
|
|
*/
|
|
int SEGGER_RTT_vprintf(unsigned BufferIndex, const char * sFormat, va_list * pParamList) {
|
|
char c;
|
|
SEGGER_RTT_PRINTF_DESC BufferDesc;
|
|
int v;
|
|
unsigned NumDigits;
|
|
unsigned FormatFlags;
|
|
unsigned FieldWidth;
|
|
char acBuffer[SEGGER_RTT_PRINTF_BUFFER_SIZE];
|
|
|
|
BufferDesc.pBuffer = acBuffer;
|
|
BufferDesc.BufferSize = SEGGER_RTT_PRINTF_BUFFER_SIZE;
|
|
BufferDesc.Cnt = 0;
|
|
BufferDesc.RTTBufferIndex = BufferIndex;
|
|
BufferDesc.ReturnValue = 0;
|
|
|
|
do {
|
|
c = *sFormat++;
|
|
if (c == 0) {
|
|
break;
|
|
}
|
|
if (c == '%') {
|
|
//
|
|
// Filter out flags
|
|
//
|
|
FormatFlags = 0;
|
|
do {
|
|
c = *sFormat;
|
|
switch (c) {
|
|
case '-': FormatFlags |= FORMAT_FLAG_LEFT_JUSTIFY; sFormat++; break;
|
|
case '0': FormatFlags |= FORMAT_FLAG_PAD_ZERO; sFormat++; break;
|
|
case '+': FormatFlags |= FORMAT_FLAG_PRINT_SIGN; sFormat++; break;
|
|
case '#': FormatFlags |= FORMAT_FLAG_ALTERNATE; sFormat++; break;
|
|
default: goto FilterFieldWidth; break;
|
|
}
|
|
} while (1);
|
|
//
|
|
// filter out field with
|
|
//
|
|
FilterFieldWidth:
|
|
FieldWidth = 0;
|
|
do {
|
|
c = *sFormat;
|
|
if (c < '0' || c > '9') {
|
|
break;
|
|
}
|
|
sFormat++;
|
|
FieldWidth = FieldWidth * 10 + (c - '0');
|
|
} while (1);
|
|
|
|
//
|
|
// Filter out precision (number of digits to display)
|
|
//
|
|
NumDigits = 0;
|
|
c = *sFormat;
|
|
if (c == '.') {
|
|
sFormat++;
|
|
do {
|
|
c = *sFormat;
|
|
if (c < '0' || c > '9') {
|
|
break;
|
|
}
|
|
sFormat++;
|
|
NumDigits = NumDigits * 10 + (c - '0');
|
|
} while (1);
|
|
}
|
|
//
|
|
// Filter out length modifier
|
|
//
|
|
c = *sFormat;
|
|
do {
|
|
if (c == 'l' || c == 'h') {
|
|
c = *sFormat++;
|
|
continue;
|
|
}
|
|
break;
|
|
} while (1);
|
|
//
|
|
// Handle specifiers
|
|
//
|
|
switch (c) {
|
|
case 'c': {
|
|
char c0;
|
|
v = va_arg(*pParamList, int);
|
|
c0 = (char)v;
|
|
_StoreChar(&BufferDesc, c0);
|
|
break;
|
|
}
|
|
case 'd':
|
|
v = va_arg(*pParamList, int);
|
|
_PrintInt(&BufferDesc, v, 10, NumDigits, FieldWidth, FormatFlags);
|
|
break;
|
|
case 'u':
|
|
v = va_arg(*pParamList, int);
|
|
_PrintUnsigned(&BufferDesc, v, 10, NumDigits, FieldWidth, FormatFlags);
|
|
break;
|
|
case 'x':
|
|
case 'X':
|
|
v = va_arg(*pParamList, int);
|
|
_PrintUnsigned(&BufferDesc, v, 16, NumDigits, FieldWidth, FormatFlags);
|
|
break;
|
|
case 's':
|
|
{
|
|
const char * s = va_arg(*pParamList, const char *);
|
|
do {
|
|
c = *s++;
|
|
if (c == 0) {
|
|
break;
|
|
}
|
|
_StoreChar(&BufferDesc, c);
|
|
} while (BufferDesc.ReturnValue >= 0);
|
|
}
|
|
break;
|
|
case 'p':
|
|
v = va_arg(*pParamList, int);
|
|
_PrintUnsigned(&BufferDesc, v, 16, 8, 8, 0);
|
|
break;
|
|
case '%':
|
|
_StoreChar(&BufferDesc, '%');
|
|
break;
|
|
}
|
|
sFormat++;
|
|
} else {
|
|
_StoreChar(&BufferDesc, c);
|
|
}
|
|
} while (BufferDesc.ReturnValue >= 0);
|
|
|
|
if (BufferDesc.ReturnValue > 0) {
|
|
//
|
|
// Write remaining data, if any
|
|
//
|
|
if (BufferDesc.Cnt != 0) {
|
|
SEGGER_RTT_Write(BufferIndex, acBuffer, BufferDesc.Cnt);
|
|
}
|
|
BufferDesc.ReturnValue += BufferDesc.Cnt;
|
|
}
|
|
return BufferDesc.ReturnValue;
|
|
}
|
|
|
|
/*********************************************************************
|
|
*
|
|
* SEGGER_RTT_printf
|
|
*
|
|
* Function description
|
|
* Stores a formatted string in SEGGER RTT control block.
|
|
* This data is read by the host.
|
|
*
|
|
* Parameters
|
|
* BufferIndex Index of "Up"-buffer to be used. (e.g. 0 for "Terminal")
|
|
* sFormat Pointer to format string, followed by the arguments for conversion
|
|
*
|
|
* Return values
|
|
* >= 0: Number of bytes which have been stored in the "Up"-buffer.
|
|
* < 0: Error
|
|
*
|
|
* Notes
|
|
* (1) Conversion specifications have following syntax:
|
|
* %[flags][FieldWidth][.Precision]ConversionSpecifier
|
|
* (2) Supported flags:
|
|
* -: Left justify within the field width
|
|
* +: Always print sign extension for signed conversions
|
|
* 0: Pad with 0 instead of spaces. Ignored when using '-'-flag or precision
|
|
* Supported conversion specifiers:
|
|
* c: Print the argument as one char
|
|
* d: Print the argument as a signed integer
|
|
* u: Print the argument as an unsigned integer
|
|
* x: Print the argument as an hexadecimal integer
|
|
* s: Print the string pointed to by the argument
|
|
* p: Print the argument as an 8-digit hexadecimal integer. (Argument shall be a pointer to void.)
|
|
*/
|
|
int SEGGER_RTT_printf(unsigned BufferIndex, const char * sFormat, ...) {
|
|
va_list ParamList;
|
|
|
|
va_start(ParamList, sFormat);
|
|
return SEGGER_RTT_vprintf(BufferIndex, sFormat, &ParamList);
|
|
}
|
|
/*************************** End of file ****************************/
|