[Projects] [nolimips: 118] Normalize string stream use

Index: ChangeLog from Benoît Perrot &lt;benoit(a)lrde.epita.fr&gt; * src/shell/shell.hh, src/shell.cc: Normalize string stream use. 2004-07-18 Benoît Perrot &lt;benoit(a)lrde.epita.fr&gt; Index: src/shell/shell.hh --- src/shell/shell.hh (revision 116) +++ src/shell/shell.hh (working copy) @@ -23,6 +23,8 @@ #ifndef SHELL_SHELL_HH # define SHELL_SHELL_HH +# include <ctype.h> + # include <list> # include <map> # include <string> @@ -163,48 +165,46 @@ return true; } + /// Skip blank characters + void skip_blank(std::istringstream &iss) + { + while (isblank(iss.peek())) + iss.get(); + } + /// Get the next word in the command line. - std::string get_next_word() + std::string get_next_word(std::istringstream &iss) { - std::stringstream strb; + skip_blank(iss); - while (cmd_buf_[pos_] == ' ') - ++pos_; - while (cmd_buf_[pos_] && (cmd_buf_[pos_] != ' ')) - strb << cmd_buf_[pos_++]; - if ((strb.str().length() == 0) && (cmd_buf_[pos_] == 0)) - return std::string(); // FIXME: awkward! - if (cmd_buf_[pos_] != 0) - ++pos_; - return std::string(strb.str()); + std::string res; + while (!isblank(iss.peek())) + { + char c = static_cast<char>(iss.get()); + if (iss.eof()) + break; + res += c; + } + return res; } /// Eat a word in the command line and return the corresponding keyword. - shell_token_type eat_word() + shell_token_type eat_word(std::istringstream &iss) { - std::stringstream strb; - - while (cmd_buf_[pos_] == ' ') - ++pos_; - while (cmd_buf_[pos_] && (cmd_buf_[pos_] != ' ')) - strb << cmd_buf_[pos_++]; - if ((strb.str().length() == 0) && (cmd_buf_[pos_] == 0)) + std::string cmd = get_next_word(iss); + if (cmd.empty()) return EOL; - if (map_token_.find(strb.str()) == map_token_.end()) + + map_token_type::const_iterator it = map_token_.find(cmd); + if (it != map_token_.end()) + return it->second; return TERROR; - if (cmd_buf_[pos_] != 0) - ++pos_; - return map_token_[strb.str()]; } private: /// virtual machine link. vm::VirtualMachine vm_; - /// command line link. - std::string cmd_buf_; - /// position in the command line parsing. - int pos_; /// map of token word. map_token_type map_token_; /// map of register. Index: src/shell/shell.cc --- src/shell/shell.cc (revision 117) +++ src/shell/shell.cc (working copy) @@ -30,8 +30,7 @@ // -------------------------------------------------------------------------- Shell::Shell(): - vm_(true, false), - pos_(0) + vm_(true, false) { map_token_["run"] = RUN; @@ -116,28 +115,27 @@ Cmd* Shell::build_cmd(const std::string &str) { - pos_ = 0; - cmd_buf_ = str; + std::istringstream iss(str); Cmd* command = 0; - switch (eat_word()) + switch (eat_word(iss)) { case QUIT: return new Cmd(Cmd::cmd_quit, *this); case RUN: { command = new Cmd(Cmd::cmd_run, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); while (0 < tmp.length()) { command->push_arg(tmp); - tmp = get_next_word(); + tmp = get_next_word(iss); } return command; } case BREAK: { command = new Cmd(Cmd::cmd_break, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); if (tmp.empty()) { delete command; @@ -161,7 +159,7 @@ case LOAD: { command = new Cmd(Cmd::cmd_load, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); if (tmp.empty()) { delete command; @@ -173,7 +171,7 @@ case PRINT: { command = new Cmd(Cmd::cmd_print, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); if (tmp.empty()) { delete command; @@ -191,7 +189,7 @@ case DISPLAY: { command = new Cmd(Cmd::cmd_display, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); if (tmp.empty()) { delete command; @@ -209,7 +207,7 @@ case UNDISPLAY: { command = new Cmd(Cmd::cmd_undisplay, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); if (tmp.empty()) { delete command; @@ -227,7 +225,7 @@ case MEM: { command = new Cmd(Cmd::cmd_mem, *this); - std::string tmp = get_next_word(); + std::string tmp = get_next_word(iss); if (tmp.empty()) { delete command;