读取并分析wgetrc文件
main():
static enum parse_lineparse_line (const char *line, char **com, char **val, int *comind){ const char *p; const char *end = line + strlen (line); const char *cmdstart, *cmdend; const char *valstart, *valend; char *cmdcopy; int ind; /* Skip leading and trailing whitespace. */ while (*line && c_isspace (*line)) ++line; while (end > line && c_isspace (end[-1])) --end; /* Skip empty lines and comments. */ if (!*line || *line == '#') return line_empty; p = line; cmdstart = p; while (p < end && (c_isalnum (*p) || *p == '_' || *p == '-')) ++p; cmdend = p; /* Skip '=', as well as any space before or after it. */ while (p < end && c_isspace (*p)) ++p; if (p == end || *p != '=') return line_syntax_error; ++p; while (p < end && c_isspace (*p)) ++p; valstart = p; valend = end; /* The syntax is valid (even though the command might not be). Fill in the command name and value. */ *com = strdupdelim (cmdstart, cmdend); *val = strdupdelim (valstart, valend); /* The line now known to be syntactically correct. Check whether the command is valid. */ BOUNDED_TO_ALLOCA (cmdstart, cmdend, cmdcopy); dehyphen (cmdcopy); ind = command_by_name (cmdcopy); if (ind == -1) return line_unknown_command; /* Report success to the caller. */ *comind = ind; return line_ok;} 776,0-1 41% ++p; cmdend = p; /* Skip '=', as well as any space before or after it. */ while (p < end && c_isspace (*p)) ++p; if (p == end || *p != '=') return line_syntax_error; ++p; while (p < end && c_isspace (*p)) ++p; valstart = p; valend = end; /* The syntax is valid (even though the command might not be). Fill in the command name and value. */ *com = strdupdelim (cmdstart, cmdend); *val = strdupdelim (valstart, valend); /* The line now known to be syntactically correct. Check whether the command is valid. */ BOUNDED_TO_ALLOCA (cmdstart, cmdend, cmdcopy); dehyphen (cmdcopy); ind = command_by_name (cmdcopy); if (ind == -1) return line_unknown_command; /* Report success to the caller. */ *comind = ind; return line_ok;} 776,0-1 41% /* Skip empty lines and comments. */ if (!*line || *line == '#') return line_empty; p = line; cmdstart = p; while (p < end && (c_isalnum (*p) || *p == '_' || *p == '-')) ++p; cmdend = p; /* Skip '=', as well as any space before or after it. */ while (p < end && c_isspace (*p)) ++p; if (p == end || *p != '=') return line_syntax_error; ++p; while (p < end && c_isspace (*p)) ++p; valstart = p; valend = end; /* The syntax is valid (even though the command might not be). Fill in the command name and value. */ *com = strdupdelim (cmdstart, cmdend); *val = strdupdelim (valstart, valend); /* The line now known to be syntactically correct. Check whether the command is valid. */ BOUNDED_TO_ALLOCA (cmdstart, cmdend, cmdcopy); dehyphen (cmdcopy); ind = command_by_name (cmdcopy); if (ind == -1) return line_unknown_command; /* Report success to the caller. */ *comind = ind; return line_ok;} 776,0-1 41% ++p; cmdend = p; /* Skip '=', as well as any space before or after it. */ while (p < end && c_isspace (*p)) ++p; if (p == end || *p != '=') return line_syntax_error; ++p; while (p < end && c_isspace (*p)) ++p; valstart = p; valend = end; /* The syntax is valid (even though the command might not be). Fill in the command name and value. */ *com = strdupdelim (cmdstart, cmdend); *val = strdupdelim (valstart, valend); /* The line now known to be syntactically correct. Check whether the command is valid. */ BOUNDED_TO_ALLOCA (cmdstart, cmdend, cmdcopy); dehyphen (cmdcopy); ind = command_by_name (cmdcopy); if (ind == -1) return line_unknown_command; /* Report success to the caller. */ *comind = ind; return line_ok;}