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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| #include "stdafx.h" | ||
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| #include "ParsingUtils.hpp" | ||
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| ParseIncludeResult ParseInclude(pstr string, pcstr& out_include_name) | ||
| { | ||
| VERIFY(string); | ||
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| // Skip any whitespace characters | ||
| string = ParseAllSpaces(string); | ||
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| // Check for #include | ||
| static constexpr pcstr IncludeTag = "#include"; | ||
| if (std::strncmp(string, IncludeTag, 8) != 0) | ||
| return ParseIncludeResult::NoInclude; | ||
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| string += 8; | ||
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| // Skip any whitespace characters | ||
| string = ParseAllSpaces(string); | ||
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| // Check that after the tag there is a quote | ||
| if (*string != '\"') | ||
| return ParseIncludeResult::Error; | ||
|
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| // Mark the start of the include name | ||
| ++string; | ||
| out_include_name = string; | ||
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| string = ParseUntil(string, '\"'); | ||
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| // Check for unterminated or empty include name | ||
| if (*string == '\0' || out_include_name == string) | ||
| return ParseIncludeResult::Error; | ||
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| // Check for unreasonably long include names | ||
| const size_t size = string - out_include_name; | ||
| if (size > 1024) | ||
| return ParseIncludeResult::Error; | ||
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| // NOTE(Andre): Yes this might look scary but it's perfectly fine. Since the include name is already in the string | ||
| // we are parsing and its not used afterwards we simply replace the closing quote with a null byte and we have a | ||
| // valid c-string pointed to by 'out_include_name' and safe ourselves the need to copy the string. | ||
| *string = '\0'; | ||
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| return ParseIncludeResult::Success; | ||
| } | ||
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| pcstr ParseAllSpaces(pcstr string) | ||
| { | ||
| VERIFY(string); | ||
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| while (*string != '\0' && std::isspace(*string)) | ||
| ++string; | ||
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| return string; | ||
| } | ||
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| pstr ParseAllSpaces(pstr string) { return const_cast<pstr>(ParseAllSpaces(reinterpret_cast<pcstr>(string))); } | ||
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| pcstr ParseUntil(pcstr string, const char character) | ||
| { | ||
| VERIFY(string); | ||
|
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| while (*string != '\0' && *string != character) | ||
| ++string; | ||
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| return string; | ||
| } | ||
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| pstr ParseUntil(pstr string, const char character) | ||
| { | ||
| return const_cast<pstr>(ParseUntil(reinterpret_cast<pcstr>(string), character)); | ||
| } | ||
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| void StringCopyLowercase(pstr destination, pcstr src, std::size_t size) | ||
| { | ||
| VERIFY(destination); | ||
| VERIFY(src); | ||
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| for (std::size_t i = 0; *src != '\0' && i < size; ++i) | ||
| { | ||
| *destination = std::tolower(*src); | ||
| ++src; | ||
| ++destination; | ||
| } | ||
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| // Ensure the string is null-terminated | ||
| *destination = '\0'; | ||
| } | ||
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| void StringCopyLowercase(pstr destination, shared_str src, std::size_t size) | ||
| { | ||
| StringCopyLowercase(destination, *src, size); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| #pragma once | ||
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| #include "xr_types.h" | ||
| #include "xrstring.h" | ||
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| enum class ParseIncludeResult | ||
| { | ||
| Success, /// There is a valid #include and 'out_include_name' contains the filename | ||
| Error, /// There is a #include but there is some problem | ||
| NoInclude, /// There is no #include on this line | ||
| }; | ||
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| // Given a string of the form: '#include "filename"' we try to parse filename into 'out_include_name' | ||
| // Note that the file name is parsed inplace to avoid copying the string | ||
| ParseIncludeResult ParseInclude(pstr string, pcstr& out_include_name); | ||
|
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| // Starting from the beginning of the string skips all characters for which 'std::isspace' is 'true'. | ||
| // Returns the first position where 'std::isspace' is 'false'. | ||
| pcstr ParseAllSpaces(pcstr string); | ||
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| pstr ParseAllSpaces(pstr string); | ||
|
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| // Starting from the begging of the string skips all characters until 'character' is found | ||
| // or until the end of the string is reached. | ||
| // Returns the first position where 'character' is found or the end of string if 'character' is not found | ||
| pcstr ParseUntil(pcstr string, const char character); | ||
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| pstr ParseUntil(pstr string, const char character); | ||
|
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| // Copies 'size' characters from 'src' to 'destination' and converts it to lowercase | ||
| void StringCopyLowercase(pstr destination, pcstr src, std::size_t size); | ||
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| void StringCopyLowercase(pstr destination, shared_str src, std::size_t size); |
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