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Fuzzy string search
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| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <string.h> | |
| #include <stdbool.h> | |
| static bool | |
| _fuzzy_search(const char *needle, const char *haystack) | |
| { | |
| size_t hlen = strlen(haystack); | |
| size_t nlen = strlen(needle); | |
| if (nlen > hlen) { | |
| return false; | |
| } | |
| if (nlen == hlen) { | |
| return strcmp(needle, haystack) == 0; | |
| } | |
| for (size_t i = 0, j = 0; i < nlen; ++i) { | |
| char nch = needle[i]; | |
| while (j < hlen) { | |
| if (haystack[j++] == nch) { | |
| goto resume; | |
| } | |
| } | |
| return false; | |
| resume: ; | |
| } | |
| return true; | |
| } | |
| #ifdef PY_MOD | |
| #include <Python.h> | |
| static PyObject * | |
| fuzzy_search(PyObject* self, PyObject* args) | |
| { | |
| char *needle = NULL, | |
| *haystack = NULL; | |
| if (!PyArg_ParseTuple(args, "ss", &needle, &haystack)) { | |
| return NULL; | |
| } | |
| return PyBool_FromLong(_fuzzy_search(needle, haystack)); | |
| } | |
| static PyMethodDef FuzzySearchMethods[] = | |
| { | |
| {"fuzzy_search", fuzzy_search, METH_VARARGS, "Fuzzy string search." }, | |
| {NULL, NULL, 0, NULL} | |
| }; | |
| PyMODINIT_FUNC | |
| initfuzzy_search(void) | |
| { | |
| (void) Py_InitModule("fuzzy_search", FuzzySearchMethods); | |
| } | |
| #else | |
| int main(int argc, char *argv[]) | |
| { | |
| char *needle = NULL, | |
| *haystack = NULL; | |
| size_t needle_len = 0; | |
| ssize_t read; | |
| if (argc < 2) { | |
| fprintf(stderr, "Usage: %s <HAYSTACK>\n", argv[0]); | |
| return 1; | |
| } | |
| haystack = argv[1]; | |
| while ((read = getline(&needle, &needle_len, stdin)) != -1) { | |
| needle[--read] = '\0'; | |
| printf("Needle: '%s'\tHaystack: '%s'\tFound: %d\n", | |
| needle, haystack, _fuzzy_search(needle, haystack)); | |
| } | |
| free(needle); | |
| return 0; | |
| } | |
| #endif |
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