mirror of
https://github.com/ada-dmitry/tmp_project.git
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48 lines
1.0 KiB
C
48 lines
1.0 KiB
C
/*
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* $gcc -Wall main.c -o main -ldl
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* $./main sin\(x\) 1.62
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* 0.998790
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* $./main sin\(x\)*exp\(x\) 1.62
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* 5.046975
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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#define BEGIN "#include <math.h>\ndouble func(double x){\nreturn "
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#define END ";\n}\n"
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#define MAKELIB "gcc -c -Wall func.c -o func.o && gcc -L. -shared func.o -o libfunc.so -lm"
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int main(int argc, char *argv[])
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{
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void *handle;
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double (*fun)(double);
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char *error;
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FILE *f;
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f = fopen("func.c", "w");
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fprintf(f, "%s%s%s", BEGIN, argv[1], END);
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fclose(f);
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system(MAKELIB);
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handle = dlopen("./libfunc.so", RTLD_LAZY);
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if (!handle)
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{
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fprintf(stderr, "%s\n", dlerror());
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exit(EXIT_FAILURE);
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}
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dlerror();
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fun = (double (*)(double))dlsym(handle, "func");
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error = dlerror();
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if (error != NULL)
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{
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fprintf(stderr, "%s\n", error);
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exit(EXIT_FAILURE);
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}
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printf("%f\n", (*fun)(atof(argv[2])));
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dlclose(handle);
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exit(EXIT_SUCCESS);
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} |