43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
#include "m-dict.h"
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#include "m-array.h"
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#include "m-algo.h"
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#include "m-string.h"
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/* Define a dictionnary (or hash_map or undordered_map)
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* from a string_t to int */
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DICT_DEF2(dict, string_t, int)
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/* Register the oplist of this dictionnary globally */
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#define M_OPL_dict_t() DICT_OPLIST(dict, STRING_OPLIST, M_DEFAULT_OPLIST)
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/* Define an array of integer */
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ARRAY_DEF(vector_int, int)
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/* Register the oplist of this array of integer globally */
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#define M_OPL_vector_int_t() ARRAY_OPLIST(vector_int)
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/* Micro macro to detect if a string starts with the given pattern */
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#define start_with(pattern, item) \
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string_start_with_str_p((item).key, (pattern))
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/* Micro macro to get the value of a pair of (key, value) */
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#define get_value(out, item) ((out) = (item).value)
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int main(void)
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{
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int s;
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// Init keys as a vector_int_t, initialize it (and prepare its destruction)
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M_LET(keys, vector_int_t)
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// Initialize m as a dictionnary and initialize it with the given database
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// Initialize tmp as a dictionanry
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M_LET( (m, (STRING_CTE("foo"), 1), (STRING_CTE("bar"), 42), (STRING_CTE("bluez"), 7), (STRING_CTE("stop"), 789) ), tmp, dict_t) {
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/* Extract all elements of 'm' that starts with 'b' */
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ALGO_EXTRACT(tmp, dict_t, m, dict_t, start_with, "b");
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/* Extract the values of theses elements */
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ALGO_TRANSFORM(keys, vector_int_t, tmp, dict_t, get_value);
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/* Sum theses values */
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ALGO_REDUCE(s, keys, vector_int_t, sum);
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printf("Sum of elements starting with 'b' is: %d\n", s);
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}
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return 0;
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}
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