88 lines
1.6 KiB
C++
88 lines
1.6 KiB
C++
/*
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* \brief Utilities
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* \author Norman Feske
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* \author Christian Prochaska
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* \date 2012-04-11
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*/
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#ifndef _UTIL_H_
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#define _UTIL_H_
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/* Genode includes */
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#include <util/string.h>
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#include <file_system/util.h>
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/**
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* Return true if null-terminated string 'substr' occurs in null-terminated
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* string 'str'
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*/
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static bool string_contains(char const *str, char const *substr)
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{
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using namespace Genode;
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size_t str_len = strlen(str);
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size_t substr_len = strlen(substr);
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if (str_len < substr_len)
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return false;
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for (size_t i = 0; i <= (str_len - substr_len); i++)
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if (strcmp(&str[i], substr, substr_len) == 0)
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return true;
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return false;
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}
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/**
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* Return true if 'str' is a valid file name
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*/
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static inline bool valid_filename(char const *str)
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{
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if (!str) return false;
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/* must have at least one character */
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if (str[0] == 0) return false;
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/* must not contain '/' or '\' or ':' */
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if (File_system::string_contains(str, '/') ||
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File_system::string_contains(str, '\\') ||
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File_system::string_contains(str, ':'))
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return false;
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return true;
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}
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/**
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* Return true if 'str' is a valid path
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*/
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static inline bool valid_path(char const *str)
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{
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if (!str) return false;
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/* must start with '/' */
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if (str[0] != '/')
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return false;
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/* must not contain '\' or ':' */
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if (File_system::string_contains(str, '\\') ||
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File_system::string_contains(str, ':'))
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return false;
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/* must not contain "/../" */
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if (string_contains(str, "/../")) return false;
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return true;
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}
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/**
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* Return true if 'str' is "/"
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*/
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static inline bool is_root(const char *str)
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{
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return (Genode::strcmp(str, "/") == 0);
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}
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#endif /* _UTIL_H_ */
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