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ceade7b926
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2542 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
69 lines
1.3 KiB
Ruby
69 lines
1.3 KiB
Ruby
require "dl/import"
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require "dl/struct"
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module LIBC
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extend DL::Importable
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begin
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dlload "libc.so.6"
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rescue
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dlload "libc.so.5"
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end
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extern "int atoi(char*)"
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extern "ibool isdigit(int)"
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extern "int gettimeofday(struct timeval *, struct timezone *)"
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extern "char* strcat(char*, char*)"
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extern "FILE* fopen(char*, char*)"
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extern "int fclose(FILE*)"
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extern "int fgetc(FILE*)"
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extern "int strlen(char*)"
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extern "void qsort(void*, int, int, void*)"
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def str_qsort(ary, comp)
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len = ary.length
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r,rs = qsort(ary, len, DL.sizeof('P'), comp)
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return rs[0].to_a('S', len)
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end
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Timeval = struct [
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"long tv_sec",
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"long tv_usec",
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]
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Timezone = struct [
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"int tz_minuteswest",
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"int tz_dsttime",
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]
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def my_compare(ptr1, ptr2)
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ptr1.ptr.to_s <=> ptr2.ptr.to_s
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end
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COMPARE = callback "int my_compare(char**, char**)"
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end
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$cb1 = DL.callback('IPP'){|ptr1, ptr2|
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str1 = ptr1.ptr.to_s
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str2 = ptr2.ptr.to_s
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str1 <=> str2
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}
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p LIBC.atoi("10")
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p LIBC.isdigit(?1)
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p LIBC.isdigit(?a)
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p LIBC.strcat("a", "b")
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ary = ["a","c","b"]
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ptr = ary.to_ptr
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LIBC.qsort(ptr, ary.length, DL.sizeof('P'), LIBC::COMPARE)
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p ptr.to_a('S', ary.length)
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tv = LIBC::Timeval.malloc
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tz = LIBC::Timezone.malloc
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LIBC.gettimeofday(tv, tz)
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p Time.at(tv.tv_sec)
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