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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com) | ||
| 3 | // | ||
| 4 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | ||
| 5 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | ||
| 6 | // | ||
| 7 | // Official repository: https://github.com/boostorg/url | ||
| 8 | // | ||
| 9 | |||
| 10 | #ifndef BOOST_URL_DETAIL_IMPL_FORMAT_ARGS_HPP | ||
| 11 | #define BOOST_URL_DETAIL_IMPL_FORMAT_ARGS_HPP | ||
| 12 | |||
| 13 | namespace boost { | ||
| 14 | namespace urls { | ||
| 15 | namespace detail { | ||
| 16 | |||
| 17 | template< | ||
| 18 | class A, | ||
| 19 | typename std::enable_if< | ||
| 20 | !std::is_integral< | ||
| 21 | typename std::decay<A>::type>::value, | ||
| 22 | int>::type = 0> | ||
| 23 | std::size_t | ||
| 24 | 286 | get_uvalue( A&& ) | |
| 25 | { | ||
| 26 | 286 | return 0; | |
| 27 | } | ||
| 28 | |||
| 29 | template< | ||
| 30 | class A, | ||
| 31 | typename std::enable_if< | ||
| 32 | std::is_integral< | ||
| 33 | typename std::decay<A>::type>::value && | ||
| 34 | std::is_signed< | ||
| 35 | typename std::decay<A>::type>::value, | ||
| 36 | int>::type = 0> | ||
| 37 | std::size_t | ||
| 38 | 94 | get_uvalue( A&& a ) | |
| 39 | { | ||
| 40 |
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94 | if (a > 0) |
| 41 | 90 | return static_cast<std::size_t>(a); | |
| 42 | 4 | return 0; | |
| 43 | } | ||
| 44 | |||
| 45 | template< | ||
| 46 | class A, | ||
| 47 | typename std::enable_if< | ||
| 48 | std::is_integral< | ||
| 49 | typename std::decay<A>::type>::value && | ||
| 50 | std::is_unsigned< | ||
| 51 | typename std::decay<A>::type>::value, | ||
| 52 | int>::type = 0> | ||
| 53 | std::size_t | ||
| 54 | 28 | get_uvalue( A&& a ) | |
| 55 | { | ||
| 56 | 28 | return static_cast<std::size_t>(a); | |
| 57 | } | ||
| 58 | |||
| 59 | BOOST_URL_DECL | ||
| 60 | std::size_t | ||
| 61 | get_uvalue( core::string_view a ); | ||
| 62 | |||
| 63 | BOOST_URL_DECL | ||
| 64 | std::size_t | ||
| 65 | get_uvalue( char a ); | ||
| 66 | |||
| 67 | template<class A> | ||
| 68 | 484 | format_arg:: | |
| 69 | format_arg( A&& a ) | ||
| 70 | : arg_( &a ) | ||
| 71 | , measure_( &measure_impl<A> ) | ||
| 72 | , fmt_( &format_impl<A> ) | ||
| 73 | 484 | , value_( get_uvalue(std::forward<A>(a) )) | |
| 74 | 484 | , ignore_( std::is_same<A, ignore_format>::value ) | |
| 75 | 484 | {} | |
| 76 | |||
| 77 | template<class A> | ||
| 78 | 37 | format_arg:: | |
| 79 | format_arg( named_arg<A>&& a ) | ||
| 80 | 37 | : arg_( &a.value ) | |
| 81 | , measure_( &measure_impl<A> ) | ||
| 82 | , fmt_( &format_impl<A> ) | ||
| 83 | , name_( a.name ) | ||
| 84 | 37 | , value_( get_uvalue(a.value)) | |
| 85 | 37 | {} | |
| 86 | |||
| 87 | template<class A> | ||
| 88 | 22 | format_arg:: | |
| 89 | format_arg( core::string_view name, A&& a ) | ||
| 90 | : arg_( &a ) | ||
| 91 | , measure_( &measure_impl<A> ) | ||
| 92 | , fmt_( &format_impl<A> ) | ||
| 93 | , name_( name ) | ||
| 94 | 22 | , value_( get_uvalue(a) ) | |
| 95 | 22 | {} | |
| 96 | |||
| 97 | // define the type-erased implementations that | ||
| 98 | // depends on everything: the context types, | ||
| 99 | // formatters, and type erased args | ||
| 100 | template <class A> | ||
| 101 | void | ||
| 102 | 477 | format_arg:: | |
| 103 | measure_impl( | ||
| 104 | format_parse_context& pctx, | ||
| 105 | measure_context& mctx, | ||
| 106 | grammar::lut_chars const& cs, | ||
| 107 | void const* a ) | ||
| 108 | { | ||
| 109 | using ref_t = typename std::remove_cv< | ||
| 110 | typename std::remove_reference<A>::type>::type; | ||
| 111 | 477 | A const& ref = *static_cast<ref_t*>( | |
| 112 | const_cast<void*>( a ) ); | ||
| 113 | 470 | formatter<ref_t> f; | |
| 114 |
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477 | pctx.advance_to( f.parse(pctx) ); |
| 115 |
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473 | mctx.advance_to( f.measure( ref, mctx, cs ) ); |
| 116 | 473 | } | |
| 117 | |||
| 118 | template <class A> | ||
| 119 | void | ||
| 120 | 469 | format_arg:: | |
| 121 | format_impl( | ||
| 122 | format_parse_context& pctx, | ||
| 123 | format_context& fctx, | ||
| 124 | grammar::lut_chars const& cs, | ||
| 125 | void const* a ) | ||
| 126 | { | ||
| 127 | using ref_t = typename std::remove_cv< | ||
| 128 | typename std::remove_reference<A>::type>::type; | ||
| 129 | 469 | A const& ref = *static_cast<ref_t*>( | |
| 130 | const_cast<void*>( a ) ); | ||
| 131 | 462 | formatter<ref_t> f; | |
| 132 |
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469 | pctx.advance_to( f.parse(pctx) ); |
| 133 |
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469 | fctx.advance_to( f.format( ref, fctx, cs ) ); |
| 134 | 469 | } | |
| 135 | |||
| 136 | // We point to formatter<ignore_format> where | ||
| 137 | // the format_arg variant would store monostate | ||
| 138 | template <> | ||
| 139 | struct formatter<ignore_format> | ||
| 140 | { | ||
| 141 | public: | ||
| 142 | char const* | ||
| 143 | 6 | parse(format_parse_context& ctx) const | |
| 144 | { | ||
| 145 | 6 | return parse_empty_spec( | |
| 146 | 6 | ctx.begin(), ctx.end()); | |
| 147 | } | ||
| 148 | |||
| 149 | std::size_t | ||
| 150 | 3 | measure( | |
| 151 | ignore_format, | ||
| 152 | measure_context& ctx, | ||
| 153 | grammar::lut_chars const&) const | ||
| 154 | { | ||
| 155 | 3 | return ctx.out(); | |
| 156 | } | ||
| 157 | |||
| 158 | char* | ||
| 159 | 3 | format( | |
| 160 | ignore_format, | ||
| 161 | format_context& ctx, | ||
| 162 | grammar::lut_chars const&) const | ||
| 163 | { | ||
| 164 | 3 | return ctx.out(); | |
| 165 | } | ||
| 166 | |||
| 167 | // We ignore the modifiers in all replacements | ||
| 168 | // for now | ||
| 169 | static | ||
| 170 | char const* | ||
| 171 | 10 | parse_empty_spec( | |
| 172 | char const* it, | ||
| 173 | char const* end) | ||
| 174 | { | ||
| 175 | // [it, end] -> "} suffix" | ||
| 176 |
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10 | BOOST_ASSERT(it != end); |
| 177 | ignore_unused(end); | ||
| 178 | // Should be always empty/valid as an | ||
| 179 | // implementation detail | ||
| 180 |
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10 | BOOST_ASSERT(*it == '}'); |
| 181 | /* | ||
| 182 | if (*it != '}') | ||
| 183 | urls::detail::throw_invalid_argument(); | ||
| 184 | */ | ||
| 185 | 10 | return it; | |
| 186 | } | ||
| 187 | }; | ||
| 188 | |||
| 189 | inline | ||
| 190 | std::size_t | ||
| 191 | 625 | measure_one( | |
| 192 | char c, | ||
| 193 | grammar::lut_chars const& unreserved) | ||
| 194 | { | ||
| 195 | // '%' must be reserved | ||
| 196 |
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625 | BOOST_ASSERT(! unreserved('%')); |
| 197 | 625 | return 1 + !unreserved(c) * 2; | |
| 198 | } | ||
| 199 | |||
| 200 | inline | ||
| 201 | void | ||
| 202 | 1394 | encode_one( | |
| 203 | char*& out, | ||
| 204 | char c, | ||
| 205 | grammar::lut_chars const& unreserved) | ||
| 206 | { | ||
| 207 | // '%' must be reserved | ||
| 208 |
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1394 | BOOST_ASSERT(! unreserved('%')); |
| 209 |
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1394 | if(unreserved(c)) |
| 210 | { | ||
| 211 | 1378 | *out++ = c; | |
| 212 | 1378 | return; | |
| 213 | } | ||
| 214 | 16 | *out++ = '%'; | |
| 215 | 16 | *out++ = urls::detail::hexdigs[0][c>>4]; | |
| 216 | 16 | *out++ = urls::detail::hexdigs[0][c&0xf]; | |
| 217 | } | ||
| 218 | |||
| 219 | // get an unsigned value from format_args | ||
| 220 | BOOST_URL_DECL | ||
| 221 | void | ||
| 222 | get_width_from_args( | ||
| 223 | std::size_t arg_idx, | ||
| 224 | core::string_view arg_name, | ||
| 225 | format_args args, | ||
| 226 | std::size_t& w); | ||
| 227 | |||
| 228 | // formatter for string view | ||
| 229 | template <> | ||
| 230 | struct formatter<core::string_view> | ||
| 231 | { | ||
| 232 | private: | ||
| 233 | char fill = ' '; | ||
| 234 | char align = '\0'; | ||
| 235 | std::size_t width = 0; | ||
| 236 | std::size_t width_idx = std::size_t(-1); | ||
| 237 | core::string_view width_name; | ||
| 238 | |||
| 239 | public: | ||
| 240 | BOOST_URL_DECL | ||
| 241 | char const* | ||
| 242 | parse(format_parse_context& ctx); | ||
| 243 | |||
| 244 | BOOST_URL_DECL | ||
| 245 | std::size_t | ||
| 246 | measure( | ||
| 247 | core::string_view str, | ||
| 248 | measure_context& ctx, | ||
| 249 | grammar::lut_chars const& cs) const; | ||
| 250 | |||
| 251 | BOOST_URL_DECL | ||
| 252 | char* | ||
| 253 | format( | ||
| 254 | core::string_view str, | ||
| 255 | format_context& ctx, | ||
| 256 | grammar::lut_chars const& cs) const; | ||
| 257 | }; | ||
| 258 | |||
| 259 | // formatter for anything convertible to a | ||
| 260 | // string view | ||
| 261 | template <class T> | ||
| 262 | struct formatter< | ||
| 263 | T, typename std::enable_if< | ||
| 264 | std::is_convertible< | ||
| 265 | T, core::string_view>::value>::type> | ||
| 266 | { | ||
| 267 | formatter<core::string_view> impl_; | ||
| 268 | |||
| 269 | public: | ||
| 270 | char const* | ||
| 271 | 480 | parse(format_parse_context& ctx) | |
| 272 | { | ||
| 273 | 480 | return impl_.parse(ctx); | |
| 274 | } | ||
| 275 | |||
| 276 | std::size_t | ||
| 277 | 242 | measure( | |
| 278 | core::string_view str, | ||
| 279 | measure_context& ctx, | ||
| 280 | grammar::lut_chars const& cs) const | ||
| 281 | { | ||
| 282 | 242 | return impl_.measure(str, ctx, cs); | |
| 283 | } | ||
| 284 | |||
| 285 | char* | ||
| 286 | 238 | format(core::string_view str, format_context& ctx, grammar::lut_chars const& cs) const | |
| 287 | { | ||
| 288 | 238 | return impl_.format(str, ctx, cs); | |
| 289 | } | ||
| 290 | }; | ||
| 291 | |||
| 292 | template <> | ||
| 293 | struct formatter<char> | ||
| 294 | { | ||
| 295 | formatter<core::string_view> impl_; | ||
| 296 | |||
| 297 | public: | ||
| 298 | char const* | ||
| 299 | 129 | parse(format_parse_context& ctx) | |
| 300 | { | ||
| 301 | 129 | return impl_.parse(ctx); | |
| 302 | } | ||
| 303 | |||
| 304 | std::size_t | ||
| 305 | 64 | measure( | |
| 306 | char c, | ||
| 307 | measure_context& ctx, | ||
| 308 | grammar::lut_chars const& cs) const | ||
| 309 | { | ||
| 310 |
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64 | return impl_.measure({&c, 1}, ctx, cs); |
| 311 | } | ||
| 312 | |||
| 313 | char* | ||
| 314 | 64 | format( | |
| 315 | char c, | ||
| 316 | format_context& ctx, | ||
| 317 | grammar::lut_chars const& cs) const | ||
| 318 | { | ||
| 319 |
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64 | return impl_.format({&c, 1}, ctx, cs); |
| 320 | } | ||
| 321 | }; | ||
| 322 | |||
| 323 | // formatters for a single integer | ||
| 324 | class integer_formatter_impl | ||
| 325 | { | ||
| 326 | char fill = ' '; | ||
| 327 | char align = '\0'; | ||
| 328 | char sign = '-'; | ||
| 329 | bool zeros = false; | ||
| 330 | std::size_t width = 0; | ||
| 331 | std::size_t width_idx = std::size_t(-1); | ||
| 332 | core::string_view width_name; | ||
| 333 | |||
| 334 | public: | ||
| 335 | BOOST_URL_DECL | ||
| 336 | char const* | ||
| 337 | parse(format_parse_context& ctx); | ||
| 338 | |||
| 339 | BOOST_URL_DECL | ||
| 340 | std::size_t | ||
| 341 | measure( | ||
| 342 | unsigned long long int v, | ||
| 343 | measure_context& ctx, | ||
| 344 | grammar::lut_chars const& cs) const; | ||
| 345 | |||
| 346 | BOOST_URL_DECL | ||
| 347 | std::size_t | ||
| 348 | measure( | ||
| 349 | long long int v, | ||
| 350 | measure_context& ctx, | ||
| 351 | grammar::lut_chars const& cs) const; | ||
| 352 | |||
| 353 | BOOST_URL_DECL | ||
| 354 | char* | ||
| 355 | format( | ||
| 356 | unsigned long long int v, | ||
| 357 | format_context& ctx, | ||
| 358 | grammar::lut_chars const& cs) const; | ||
| 359 | |||
| 360 | BOOST_URL_DECL | ||
| 361 | char* | ||
| 362 | format( | ||
| 363 | long long int v, | ||
| 364 | format_context& ctx, | ||
| 365 | grammar::lut_chars const& cs) const; | ||
| 366 | }; | ||
| 367 | |||
| 368 | template <class T> | ||
| 369 | struct formatter< | ||
| 370 | T, typename std::enable_if< | ||
| 371 | mp11::mp_contains<mp11::mp_list< | ||
| 372 | short int, | ||
| 373 | int, | ||
| 374 | long int, | ||
| 375 | long long int, | ||
| 376 | unsigned short int, | ||
| 377 | unsigned int, | ||
| 378 | unsigned long int, | ||
| 379 | unsigned long long int>, T>::value>::type> | ||
| 380 | { | ||
| 381 | private: | ||
| 382 | integer_formatter_impl impl_; | ||
| 383 | using base_value_type = typename std::conditional< | ||
| 384 | std::is_unsigned<T>::value, | ||
| 385 | unsigned long long int, | ||
| 386 | long long int | ||
| 387 | >::type; | ||
| 388 | |||
| 389 | public: | ||
| 390 | char const* | ||
| 391 | 186 | parse(format_parse_context& ctx) | |
| 392 | { | ||
| 393 | 186 | return impl_.parse(ctx); | |
| 394 | } | ||
| 395 | |||
| 396 | std::size_t | ||
| 397 | 92 | measure( | |
| 398 | T v, | ||
| 399 | measure_context& ctx, | ||
| 400 | grammar::lut_chars const& cs) const | ||
| 401 | { | ||
| 402 | return impl_.measure( | ||
| 403 | 92 | static_cast<base_value_type>(v), ctx, cs); | |
| 404 | } | ||
| 405 | |||
| 406 | char* | ||
| 407 | 48 | format(T v, format_context& ctx, grammar::lut_chars const& cs) const | |
| 408 | { | ||
| 409 | return impl_.format( | ||
| 410 | 48 | static_cast<base_value_type>(v), ctx, cs); | |
| 411 | } | ||
| 412 | }; | ||
| 413 | |||
| 414 | } // detail | ||
| 415 | } // url | ||
| 416 | } // boost | ||
| 417 | |||
| 418 | #endif | ||
| 419 |