fix the file scan error related to CRLF format

[chennevwin]

目的

修复若使用CRLF格式换行的配置文件，调用int DataReaderFromAndroidAsset::scan(const char* format, void* p)函数导致解析异常的问题

问题说明

当采用Windows开发Android项目，由于git core.autocrlf 功能，会将配置文件换行转为CRLF风格的文件，导致执行DataReaderFromAndroidAsset::scan解析数据出现问题

问题举例

假如输入数据是
"123\r\n456"

第一次调用
dr.scan("%d", &a);

走else处理

newline_pos = (const char*)memchr((const char*)d->mem, '\n', remain_length);

size_t line_length = newline_pos ? newline_pos - (const char*)d->mem : (size_t)remain_length;
line = std::string((const char*)d->mem, line_length);

得 line = "123\r"

int nscan = sscanf(line.c_str(), format_with_n, p, &nconsumed);

得到
nconsumed = 3
p = 123

d->mem += nconsumed;

此刻 d->mem 指向的是 '\r' 后续数据就是 "\r\n456"

当第二次调用
dr.scan("%d", &a);
由于'\r'才是第一个字符，还是走的else

newline_pos = (const char*)memchr((const char*)d->mem, '\n', remain_length);

size_t line_length = newline_pos ? newline_pos - (const char*)d->mem : (size_t)remain_length;
line = std::string((const char*)d->mem, line_length);

得 line = "\r"

到这里执行解析就不正确了，这并不是我们预期的，正确处理应该是类似\n处理，跳过\r\n读后续的数据

[tencent-adm]

All committers have signed the CLA.

[Copilot]

Pull request overview

This PR fixes a parsing issue in DataReaderFromAndroidAsset::scan() when configuration files use CRLF (Windows-style) line endings. When scanning data with CRLF line endings, the function would fail to properly skip over the \r\n sequence between lines, causing the parser to point to the leftover \r character and fail on subsequent scans.

Key Changes:

• Added CRLF detection and handling logic to skip \r\n sequences at the beginning of a line, mirroring the existing logic for LF-only line endings

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[Copilot]

The condition 'remain_length > 2' should be 'remain_length >= 2' since you only need to access indices 0 and 1, which requires at least 2 bytes, not more than 2 bytes.

Suggested change

	else if(remain_length > 2 && ((const char*)d->mem)[0] == '\r' && ((const char*)d->mem)[1] == '\n'){
	else if (remain_length >= 2 && ((const char*)d->mem)[0] == '\r' && ((const char*)d->mem)[1] == '\n')
	{

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.90%. Comparing base (39003ec) to head (b775fa2).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6472   +/-   ##
=======================================
  Coverage   95.90%   95.90%           
=======================================
  Files         844      844           
  Lines      265298   265299    +1     
=======================================
+ Hits       254431   254432    +1     
  Misses      10867    10867           

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[nihui]

Thanks for your contribution !