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Add the sqlite3_stdio.h library for Windows console I/O.
FossilOrigin-Name: fcd0ecffc9889f8c855ea340f075ec42cdca482df82d6e67dc9c32613e8d5846
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drh
157
ext/misc/sqlite3_stdio.c
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157
ext/misc/sqlite3_stdio.c
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/*
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** 2024-09-24
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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*************************************************************************
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**
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** Implementation of standard I/O interfaces for UTF-8 that are missing
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** on Windows.
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*/
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#ifdef _WIN32 /* This file is a no-op on all platforms except Windows */
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/*
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** Work-alike for the fopen() routine from the standard C library.
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*/
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FILE *sqlite3_fopen(const char *zFilename, const char *zMode){
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FILE *fp = 0;
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wchar_t *b1, *b2;
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int sz1, sz2;
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sz1 = (int)strlen(zFilename);
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sz2 = (int)strlen(zMode);
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b1 = malloc( (sz1+1)*sizeof(b1[0]) );
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b2 = malloc( (sz2+1)*sizeof(b1[0]) );
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if( b1 && b2 ){
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sz1 = MultiByteToWideChar(CP_UTF8, 0, zFilename, sz1, b1, sz1);
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b1[sz1] = 0;
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sz2 = MultiByteToWideChar(CP_UTF8, 0, zMode, sz2, b2, sz2);
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b2[sz2] = 0;
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fp = _wfopen(b1, b2);
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}
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free(b1);
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free(b2);
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return fp;
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}
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/*
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** Work-alike for the popen() routine from the standard C library.
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*/
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FILE *sqlite3_popen(const char *zCommand, const char *zMode){
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FILE *fp = 0;
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wchar_t *b1, *b2;
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int sz1, sz2;
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sz1 = (int)strlen(zCommand);
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sz2 = (int)strlen(zMode);
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b1 = malloc( (sz1+1)*sizeof(b1[0]) );
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b2 = malloc( (sz2+1)*sizeof(b1[0]) );
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if( b1 && b2 ){
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sz1 = MultiByteToWideChar(CP_UTF8, 0, zCommand, sz1, b1, sz1);
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b1[sz1] = 0;
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sz2 = MultiByteToWideChar(CP_UTF8, 0, zMode, sz2, b2, sz2);
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b2[sz2] = 0;
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fp = _wpopen(b1, b2);
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}
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free(b1);
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free(b2);
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return fp;
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}
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/*
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** Work-alike for fgets() from the standard C library.
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*/
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char *sqlite3_fgets(char *buf, int sz, FILE *in){
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if( isatty(_fileno(in)) ){
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/* When reading from the command-prompt in Windows, it is necessary
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** to use _O_WTEXT input mode to read UTF-16 characters, then translate
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** that into UTF-8. Otherwise, non-ASCII characters all get translated
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** into '?'.
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*/
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wchar_t *b1 = malloc( sz*sizeof(wchar_t) );
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if( b1==0 ) return 0;
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_setmode(_fileno(in), _O_WTEXT);
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if( fgetws(b1, sz/4, in)==0 ){
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sqlite3_free(b1);
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return 0;
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}
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WideCharToMultiByte(CP_UTF8, 0, b1, -1, buf, sz, 0, 0);
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sqlite3_free(b1);
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return buf;
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}else{
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/* Reading from a file or other input source, just read bytes without
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** any translation. */
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return fgets(buf, sz, in);
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}
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}
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/*
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** Work-alike for fputs() from the standard C library.
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*/
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int sqlite3_fputs(const char *z, FILE *out){
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if( isatty(_fileno(out)) ){
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/* When writing to the command-prompt in Windows, it is necessary
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** to use _O_WTEXT input mode and write UTF-16 characters.
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*/
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int sz = (int)strlen(z);
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wchar_t *b1 = malloc( (sz+1)*sizeof(wchar_t) );
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if( b1==0 ) return 0;
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sz = MultiByteToWideChar(CP_UTF8, 0, z, sz, b1, sz);
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b1[sz] = 0;
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_setmode(_fileno(out), _O_WTEXT);
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fputws(b1, out);
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sqlite3_free(b1);
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return 0;
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}else{
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/* Writing to a file or other destination, just write bytes without
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** any translation. */
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return fputs(z, out);
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}
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}
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/*
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** Work-alike for fprintf() from the standard C library.
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*/
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int sqlite3_fprintf(FILE *out, const char *zFormat, ...){
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int rc;
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if( isatty(fileno(out)) ){
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/* When writing to the command-prompt in Windows, it is necessary
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** to use _O_WTEXT input mode and write UTF-16 characters.
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*/
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char *z;
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va_list ap;
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va_start(ap, zFormat);
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z = sqlite3_vmprintf(zFormat, ap);
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va_end(ap);
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sqlite3_fputs(z, out);
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rc = (int)strlen(z);
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sqlite3_free(z);
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}else{
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/* Writing to a file or other destination, just write bytes without
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** any translation. */
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va_list ap;
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va_start(ap, zFormat);
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rc = vfprintf(out, zFormat, ap);
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va_end(ap);
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}
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return rc;
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}
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/*
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** Set the mode for a stream. mode argument is typically _O_BINARY or
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** _O_TEXT.
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*/
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void sqlite3_fsetmode(FILE *fp, int mode){
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fflush(fp);
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_setmode(_fileno(fp), mode);
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}
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#endif /* defined(_WIN32) */
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52
ext/misc/sqlite3_stdio.h
Normal file
52
ext/misc/sqlite3_stdio.h
Normal file
@@ -0,0 +1,52 @@
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/*
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** 2024-09-24
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**
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** The author disclaims copyright to this source code. In place of
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** a legal notice, here is a blessing:
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**
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** May you do good and not evil.
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** May you find forgiveness for yourself and forgive others.
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** May you share freely, never taking more than you give.
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**
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*************************************************************************
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**
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** This header file contains definitions of interfaces that provide
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** cross-platform I/O for UTF-8 content.
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**
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** On most platforms, the interfaces definitions in this file are
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** just #defines. For example sqlite3_fopen() is a macro that resolves
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** to the standard fopen() in the C-library.
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**
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** But Windows does not have a standard C-library, at least not one that
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** can handle UTF-8. So for windows build, the interfaces resolve to new
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** C-language routines contained in the separate sqlite3_stdio.c source file.
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**
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** So on all non-Windows platforms, simply #include this header file and
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** use the interfaces defined herein. Then to run your application on Windows,
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** also link in the accompanying sqlite3_stdio.c source file when compiling
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** to get compatible interfaces.
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*/
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#ifdef _WIN32
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/**** Definitions For Windows ****/
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#include <stdio.h>
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#include <windows.h>
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FILE *sqlite3_fopen(const char *zFilename, const char *zMode);
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FILE *sqlite3_popen(const char *zCommand, const char *type);
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char *sqlite3_fgets(char *s, int size, FILE *stream);
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int sqlite3_fputs(const char *s, FILE *stream);
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int sqlite3_fprintf(FILE *stream, const char *format, ...);
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void sqlite3_fsetmode(FILE *stream, int mode);
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#else
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/**** Definitions For All Other Platforms ****/
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#include <stdio.h>
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#define sqlite3_fopen fopen
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#define sqlite3_popen popen
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#define sqlite3_fgets fgets
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#define sqlite3_fputs fputs
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#define sqlite3_fprintf fprintf
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#define sqlite3_fsetmode(F,X) /*no-op*/
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#endif
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