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https://github.com/visualboyadvance-m/visualboyadvance-m
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ba9c10d566
Add macro fi_check_done() to set fi_done if leftover contents is empty, use it in both fi_open_file() and fi_get_next_line(). This fixes the behavior when the opened file is empty and makes the code cleaner. Add a usage example to top comment. Signed-off-by: Rafael Kitover <rkitover@gmail.com>
45 lines
967 B
CMake
45 lines
967 B
CMake
# Interface for iterating over a text file by line.
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#
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# Example usage:
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#
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# fi_open_file(${some_file})
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#
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# while(NOT fi_done)
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# fi_get_next_line()
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#
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# message(STATUS "read line: ${fi_line}")
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# endwhile()
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macro(fi_check_done)
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string(LENGTH "${fi_file_contents}" len)
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set(fi_done FALSE PARENT_SCOPE)
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if(len EQUAL 0)
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set(fi_done TRUE PARENT_SCOPE)
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endif()
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endmacro()
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function(fi_open_file file)
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file(READ "${file}" fi_file_contents)
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set(fi_file_contents "${fi_file_contents}" PARENT_SCOPE)
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fi_check_done()
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endfunction()
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function(fi_get_next_line)
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string(FIND "${fi_file_contents}" "\n" pos)
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string(SUBSTRING "${fi_file_contents}" 0 ${pos} fi_line)
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math(EXPR pos "${pos} + 1")
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string(SUBSTRING "${fi_file_contents}" ${pos} -1 fi_file_contents)
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fi_check_done()
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set(fi_line "${fi_line}" PARENT_SCOPE)
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set(fi_file_contents "${fi_file_contents}" PARENT_SCOPE)
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endfunction()
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