36 lines
1,015 B
C
36 lines
1,015 B
C
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#include <string.h>
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#include <sqlite3ext.h>
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SQLITE_EXTENSION_INIT1
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/*
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** The sqlite3_instr() SQL function returns the location of a substring match. An
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** implementation of MySQL's instr() function.
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*/
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void sqlite3_instr(sqlite3_context* pContext, int argc, sqlite3_value** argv)
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{
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const char *str1 = (const char *) sqlite3_value_text(argv[0]);
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const char *str2 = (const char *) sqlite3_value_text(argv[1]);
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char *p = strstr(str1, str2);
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int nResult = 0;
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if(p != NULL) {
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nResult = p - str1 + 1;
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}
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sqlite3_result_int(pContext, nResult);
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}
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/* SQLite invokes this routine once when it loads the extension.
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** Create new functions, collating sequences, and virtual table
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** modules here. This is usually the only exported symbol in
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** the shared library.
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*/
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int sqlite3_extension_init(sqlite3 *db, char **pzErrMsg, const sqlite3_api_routines *pApi)
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{
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SQLITE_EXTENSION_INIT2(pApi)
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sqlite3_create_function(db, "instr", 2, SQLITE_ANY, 0, sqlite3_instr, 0, 0);
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return 0;
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}
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