diff options
Diffstat (limited to 'lib/nes/common/string-builder.hh')
| -rw-r--r-- | lib/nes/common/string-builder.hh | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/lib/nes/common/string-builder.hh b/lib/nes/common/string-builder.hh index 256c267..0298b8e 100644 --- a/lib/nes/common/string-builder.hh +++ b/lib/nes/common/string-builder.hh @@ -2,6 +2,7 @@ #include "nes/common/types.hh" #include "nes/common/span.hh" +#include "nes/common/status.hh" #include <string_view> namespace nes @@ -17,9 +18,11 @@ namespace nes /// Builds a string into a fixed-length buffer. class string_builder { + template<u32 Capacity> + friend class string_buffer; + span<char> buffer_; u32 length_{ 0 }; - bool is_good_{ true }; enum class format_arg_type { @@ -65,14 +68,11 @@ namespace nes /// Get the resulting string. auto get_result() const -> std::string_view { return std::string_view{ buffer_.get_data(), length_ }; } - /// Returns false after an invalid format string or buffer overflow. - auto is_good() const -> bool { return is_good_; } - - auto append_char(char) -> string_builder&; - auto append_string(std::string_view) -> string_builder&; - auto append_int(i64, number_format = number_format::decimal) -> string_builder&; - auto append_int(u64, number_format = number_format::decimal) -> string_builder&; - auto append_bool(bool) -> string_builder&; + auto append_char(char) -> status; + auto append_string(std::string_view) -> status; + auto append_int(i64, number_format = number_format::decimal) -> status; + auto append_int(u64, number_format = number_format::decimal) -> status; + auto append_bool(bool) -> status; /// Print a templated string. /// @@ -82,7 +82,7 @@ namespace nes /// /// Curly braces can be escaped by repeating them twice like {{this}}. template<typename... Args> - auto append_format(std::string_view const fmt, Args... args) -> string_builder& + auto append_format(std::string_view const fmt, Args... args) -> status { constexpr u32 arg_count = sizeof...(Args); // Add another argument at the end so we don't have an empty array expression. @@ -92,8 +92,8 @@ namespace nes } private: - auto append_format(std::string_view fmt, format_arg const* args, u32 arg_count) -> string_builder&; - auto append_format_arg(format_arg, std::string_view params) -> string_builder&; + auto append_format(std::string_view fmt, format_arg const* args, u32 arg_count) -> status; + auto append_format_arg(format_arg, std::string_view params) -> status; }; /// A string builder with a buffer embedded into it. @@ -107,5 +107,18 @@ namespace nes : string_builder{ buffer_ } { } + + string_buffer(string_buffer const& other) + : string_builder{ buffer_ } + { + std::copy_n(other.buffer_, Capacity, buffer_); + length_ = other.length_; + } + + auto operator=(string_buffer const& other) + { + std::copy_n(other.buffer_, Capacity, buffer_); + length_ = other.length_; + } }; } // namespace nes
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