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50 lines
1.8 KiB
50 lines
1.8 KiB
4 months ago
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// Useful string functions and so forth. This is a grab-bag file.
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//
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// You might also want to look at memutil.h, which holds mem*()
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// equivalents of a lot of the str*() functions in string.h,
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// eg memstr, mempbrk, etc.
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//
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// These functions work fine for UTF-8 strings as long as you can
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// consider them to be just byte strings. For example, due to the
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// design of UTF-8 you do not need to worry about accidental matches,
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// as long as all your inputs are valid UTF-8 (use \uHHHH, not \xHH or \oOOO).
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//
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// Caveats:
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// * all the lengths in these routines refer to byte counts,
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// not character counts.
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// * case-insensitivity in these routines assumes that all the letters
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// in question are in the range A-Z or a-z.
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//
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// If you need Unicode specific processing (for example being aware of
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// Unicode character boundaries, or knowledge of Unicode casing rules,
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// or various forms of equivalence and normalization), take a look at
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// files in i18n/utf8.
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#ifndef DYNAMIC_DEPTH_INTERNAL_STRINGS_UTIL_H_ // NOLINT
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#define DYNAMIC_DEPTH_INTERNAL_STRINGS_UTIL_H_ // NOLINT
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#include <string>
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#include "base/port.h"
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#include "fastmem.h"
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namespace dynamic_depth {
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// Returns whether str begins with prefix.
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inline bool HasPrefixString(const string& str, const string& prefix) {
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return str.length() >= prefix.length() &&
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::dynamic_depth::strings::memeq(&str[0], &prefix[0], prefix.length());
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}
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// Returns whether str ends with suffix.
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inline bool HasSuffixString(const string& str, const string& suffix) {
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return str.length() >= suffix.length() &&
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::dynamic_depth::strings::memeq(
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&str[0] + (str.length() - suffix.length()), &suffix[0],
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suffix.length());
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}
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} // namespace dynamic_depth
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#endif // DYNAMIC_DEPTH_INTERNAL_STRINGS_UTIL_H_ // NOLINT
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