/**
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* @file shell_ext.c
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* @author Letter (NevermindZZT@gmail.com)
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* @brief shell extensions
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* @version 3.0.0
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* @date 2019-12-31
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*
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* @copyright (c) 2019 Letter
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*
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*/
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#include "shell_cfg.h"
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#include "shell.h"
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#include "shell_ext.h"
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extern ShellCommand* shellSeekCommand(Shell *shell,
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const char *cmd,
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ShellCommand *base,
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unsigned short compareLength);
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extern int shellGetVarValue(Shell *shell, ShellCommand *command);
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/**
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* @brief 判断数字进制
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*
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* @param string 参数字符串
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* @return ShellNumType 进制
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*/
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static ShellNumType shellExtNumType(char *string)
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{
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char *p = string;
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ShellNumType type = NUM_TYPE_DEC;
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if ((*p == '0') && ((*(p + 1) == 'x') || (*(p + 1) == 'X')))
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{
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type = NUM_TYPE_HEX;
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}
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else if ((*p == '0') && ((*(p + 1) == 'b') || (*(p + 1) == 'B')))
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{
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type = NUM_TYPE_BIN;
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}
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else if (*p == '0')
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{
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type = NUM_TYPE_OCT;
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}
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while (*p++)
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{
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if (*p == '.' && *(p + 1) != 0)
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{
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type = NUM_TYPE_FLOAT;
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break;
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}
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}
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return type;
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}
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/**
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* @brief 字符转数字
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*
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* @param code 字符
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* @return char 数字
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*/
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static char shellExtToNum(char code)
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{
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if ((code >= '0') && (code <= '9'))
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{
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return code -'0';
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}
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else if ((code >= 'a') && (code <= 'f'))
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{
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return code - 'a' + 10;
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}
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else if ((code >= 'A') && (code <= 'F'))
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{
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return code - 'A' + 10;
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}
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else
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{
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return 0;
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}
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}
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/**
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* @brief 解析字符参数
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*
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* @param string 字符串参数
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* @return char 解析出的字符
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*/
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static char shellExtParseChar(char *string)
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{
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char *p = string + 1;
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char value = 0;
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if (*p == '\\')
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{
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switch (*(p + 1))
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{
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case 'b':
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value = '\b';
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break;
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case 'r':
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value = '\r';
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break;
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case 'n':
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value = '\n';
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break;
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case 't':
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value = '\t';
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break;
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case '0':
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value = 0;
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break;
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default:
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value = *(p + 1);
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break;
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}
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}
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else
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{
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value = *p;
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}
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return value;
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}
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/**
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* @brief 解析字符串参数
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*
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* @param string 字符串参数
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* @return char* 解析出的字符串
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*/
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static char* shellExtParseString(char *string)
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{
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char *p = string;
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unsigned short index = 0;
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if (*string == '\"')
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{
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p = ++string;
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}
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while (*p)
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{
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if (*p == '\\')
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{
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*(string + index) = shellExtParseChar(p - 1);
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p++;
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}
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else if (*p == '\"')
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{
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*(string + index) = 0;
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}
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else
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{
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*(string + index) = *p;
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}
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p++;
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index ++;
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}
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*(string + index) = 0;
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return string;
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}
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/**
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* @brief 解析数字参数
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*
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* @param string 字符串参数
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* @return unsigned int 解析出的数字
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*/
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static unsigned int shellExtParseNumber(char *string)
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{
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ShellNumType type = NUM_TYPE_DEC;
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char radix = 10;
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char *p = string;
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char offset = 0;
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signed char sign = 1;
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unsigned int valueInt = 0;
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float valueFloat = 0.0;
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unsigned int devide = 0;
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if (*string == '-')
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{
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sign = -1;
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}
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type = shellExtNumType(string + ((sign == -1) ? 1 : 0));
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switch ((char)type)
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{
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case NUM_TYPE_HEX:
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radix = 16;
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offset = 2;
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break;
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case NUM_TYPE_OCT:
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radix = 8;
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offset = 1;
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break;
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case NUM_TYPE_BIN:
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radix = 2;
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offset = 2;
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break;
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default:
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break;
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}
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p = string + offset + ((sign == -1) ? 1 : 0);
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while (*p)
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{
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if (*p == '.')
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{
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devide = 1;
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p++;
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continue;
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}
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valueInt = valueInt * radix + shellExtToNum(*p);
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devide *= 10;
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p++;
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}
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if (type == NUM_TYPE_FLOAT && devide != 0)
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{
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valueFloat = (float)valueInt / devide * sign;
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return *(unsigned int *)(&valueFloat);
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}
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else
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{
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return valueInt * sign;
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}
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}
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/**
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* @brief 解析变量参数
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*
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* @param shell shell对象
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* @param var 变量
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* @return unsigned int 变量值
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*/
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static unsigned int shellExtParseVar(Shell *shell, char *var)
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{
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ShellCommand *command = shellSeekCommand(shell,
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var + 1,
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shell->commandList.base,
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0);
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if (command)
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{
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return shellGetVarValue(shell, command);
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}
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else
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{
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return 0;
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}
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}
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/**
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* @brief 解析参数
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*
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* @param shell shell对象
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* @param string 参数
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* @return unsigned int 解析结果
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*/
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unsigned int shellExtParsePara(Shell *shell, char *string)
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{
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if (*string == '\'' && *(string + 1))
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{
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return (unsigned int)shellExtParseChar(string);
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}
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else if (*string == '-' || (*string >= '0' && *string <= '9'))
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{
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return (unsigned int)shellExtParseNumber(string);
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}
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else if (*string == '$' && *(string + 1))
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{
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return shellExtParseVar(shell, string);
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}
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else if (*string)
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{
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return (unsigned int)shellExtParseString(string);
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}
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return 0;
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}
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/**
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* @brief 执行命令
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*
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* @param shell shell对象
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* @param command 命令
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* @param argc 参数个数
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* @param argv 参数
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* @return int 返回值
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*/
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int shellExtRun(Shell *shell, ShellCommand *command, int argc, char *argv[])
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{
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unsigned int params[SHELL_PARAMETER_MAX_NUMBER] = {0};
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int paramNum = command->attr.attrs.paramNum > (argc - 1) ?
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command->attr.attrs.paramNum : (argc - 1);
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for (int i = 0; i < argc - 1; i++)
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{
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params[i] = shellExtParsePara(shell, argv[i + 1]);
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}
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switch (paramNum)
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{
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#if SHELL_PARAMETER_MAX_NUMBER >= 1
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case 0:
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return command->data.cmd.function();
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 1 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 2
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case 1:
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return command->data.cmd.function(params[0]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 2 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 3
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case 2:
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return command->data.cmd.function(params[0], params[1]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 3 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 4
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case 3:
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return command->data.cmd.function(params[0], params[1],
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params[2]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 4 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 5
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case 4:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 5 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 6
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case 5:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 6 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 7
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case 6:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 7 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 8
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case 7:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 8 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 9
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case 8:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 9 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 10
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case 9:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 10 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 11
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case 10:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8], params[9]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 11 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 12
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case 11:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8], params[9],
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params[10]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 12 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 13
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case 12:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8], params[9],
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params[10], params[11]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 13 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 14
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case 13:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8], params[9],
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params[10], params[11],
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params[12]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 14 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 15
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case 14:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8], params[9],
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params[10], params[11],
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params[12], params[13]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 15 */
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#if SHELL_PARAMETER_MAX_NUMBER >= 16
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case 15:
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return command->data.cmd.function(params[0], params[1],
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params[2], params[3],
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params[4], params[5],
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params[6], params[7],
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params[8], params[9],
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params[10], params[11],
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params[12], params[13],
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params[14]);
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// break;
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#endif /** SHELL_PARAMETER_MAX_NUMBER >= 16 */
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default:
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return -1;
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// break;
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}
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}
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