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https://github.com/fluencelabs/c-template
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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
#ifndef C_TEMPLATE_SIDE_MODULE_API_H
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#define C_TEMPLATE_SIDE_MODULE_API_H
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#include <string.h>
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#include <stdlib.h>
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/*
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* Concatenate preprocessor tokens A and B without expanding macro definitions
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* (however, if invoked from a macro, macro arguments are expanded).
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*/
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#define PPCAT_NX(A, B) A ## B
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/*
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* Concatenate preprocessor tokens A and B after macro-expanding them.
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*/
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#define PPCAT(A, B) PPCAT_NX(A, B)
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/*
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* Turn A into a string literal without expanding macro definitions
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* (however, if invoked from a macro, macro arguments are expanded).
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*/
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#define STRINGIZE_NX(A) #A
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/*
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* Turn A into a string literal after macro-expanding it.
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*/
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#define STRINGIZE(A) STRINGIZE_NX(A)
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#define __MODULE_IMPORT(module_name) \
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void module_name ## _store(char *ptr, char byte) __attribute__((__import_module__(#module_name), __import_name__(STRINGIZE(PPCAT(module_name, _store))))); \
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unsigned char module_name ## _load(char *ptr) __attribute__((__import_module__(#module_name), __import_name__(STRINGIZE(PPCAT(module_name, _load))))); \
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char* module_name ## _allocate(unsigned int size) __attribute__((__import_module__(#module_name), __import_name__(STRINGIZE(PPCAT(module_name, _allocate))))); \
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void module_name ## _deallocate(char *ptr, unsigned int size) __attribute__((__import_module__(#module_name), __import_name__(STRINGIZE(PPCAT(module_name, _deallocate))))); \
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char* module_name ## _invoke(char *ptr, int size) __attribute__((__import_module__(#module_name), __import_name__(STRINGIZE(PPCAT(module_name, _invoke))))); \
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\
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char * module_name ## _call(const char *ptr, int length) { \
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char *request_ptr = module_name ## _allocate(length); \
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\
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for(int i = 0; i < length; ++i) { \
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module_name ## _store(request_ptr + i, ptr[i]); \
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} \
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char *result = module_name ## _invoke(request_ptr, length); \
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\
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unsigned int result_size = 0; \
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for (int i = 0; i < 4; ++i) { \
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result_size = result_size | ((unsigned int)result[i] << 8*i); \
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} \
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\
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char *result_out = malloc(result_size + 1); \
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for(int i = 0; i < result_size; ++i) { \
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result_out[i] = module_name ## _load(result + 4 + i); \
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}\
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\
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result_out[result_size] = '\0'; \
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\
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module_name ## _deallocate(result, result_size); \
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\
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return result_out;\
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}
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#endif //C_TEMPLATE_SIDE_MODULE_API_H
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