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Overview
Comment:Fix the character width tables for the CLI such that all unicode code-points less than 0x300 have a width of 1. This is in fact the case for Mac, Ubuntu, and Windows.
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SHA3-256: f0c5a86fefecded07e098e1326dd54c72504b0bb480f710e395d4041a322dfcb
User & Date: drh 2024-09-30 18:19:38
Context
2024-10-01
10:49
Add an #if'd-out block to sqlite3-wasm.c mentioning the LONGDOUBLE_TYPE, as brought up in forum post cbfb0d0ac. No functional changes. (check-in: 0b83e8f1 user: stephan tags: trunk)
2024-09-30
18:19
Fix the character width tables for the CLI such that all unicode code-points less than 0x300 have a width of 1. This is in fact the case for Mac, Ubuntu, and Windows. (check-in: f0c5a86f user: drh tags: trunk)
17:28
In fts5, avoid starting a new merge of level L if there exists already an ongoing merge of a level less than L. (check-in: 350c6e75 user: dan tags: trunk)
Changes
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Changes to src/shell.c.in.

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/* Lookup table to estimate the number of columns consumed by a Unicode
** character.
*/
static const struct {
  unsigned char w;    /* Width of the character in columns */
  int iFirst;         /* First character in a span having this width */
} aUWidth[] = {
   /* {0, 0x00000},  {1, 0x00020},  {0, 0x0007f},  {1, 0x000a0}, */
  {0, 0x00300},  {1, 0x00370},  {0, 0x00483},  {1, 0x00487},  {0, 0x00488},
  {1, 0x0048a},  {0, 0x00591},  {1, 0x005be},  {0, 0x005bf},  {1, 0x005c0},
  {0, 0x005c1},  {1, 0x005c3},  {0, 0x005c4},  {1, 0x005c6},  {0, 0x005c7},
  {1, 0x005c8},  {0, 0x00600},  {1, 0x00604},  {0, 0x00610},  {1, 0x00616},
  {0, 0x0064b},  {1, 0x0065f},  {0, 0x00670},  {1, 0x00671},  {0, 0x006d6},
  {1, 0x006e5},  {0, 0x006e7},  {1, 0x006e9},  {0, 0x006ea},  {1, 0x006ee},
  {0, 0x0070f},  {1, 0x00710},  {0, 0x00711},  {1, 0x00712},  {0, 0x00730},








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/* Lookup table to estimate the number of columns consumed by a Unicode
** character.
*/
static const struct {
  unsigned char w;    /* Width of the character in columns */
  int iFirst;         /* First character in a span having this width */
} aUWidth[] = {
   /* {1, 0x00000}, */
  {0, 0x00300},  {1, 0x00370},  {0, 0x00483},  {1, 0x00487},  {0, 0x00488},
  {1, 0x0048a},  {0, 0x00591},  {1, 0x005be},  {0, 0x005bf},  {1, 0x005c0},
  {0, 0x005c1},  {1, 0x005c3},  {0, 0x005c4},  {1, 0x005c6},  {0, 0x005c7},
  {1, 0x005c8},  {0, 0x00600},  {1, 0x00604},  {0, 0x00610},  {1, 0x00616},
  {0, 0x0064b},  {1, 0x0065f},  {0, 0x00670},  {1, 0x00671},  {0, 0x006d6},
  {1, 0x006e5},  {0, 0x006e7},  {1, 0x006e9},  {0, 0x006ea},  {1, 0x006ee},
  {0, 0x0070f},  {1, 0x00710},  {0, 0x00711},  {1, 0x00712},  {0, 0x00730},
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** Inaccuracies in the width estimates might cause columns to be misaligned.
** Unfortunately, there is nothing we can do about that.
*/
int cli_wcwidth(int c){
  int iFirst, iLast;

  /* Fast path for common characters */
  if( c<0x20 ) return 0;
  if( c<0x7f ) return 1;
  if( c<0xa0 ) return 0;
  if( c<=0x300 ) return 1;

  /* The general case */
  iFirst = 0;
  iLast = sizeof(aUWidth)/sizeof(aUWidth[0]) - 1;
  while( iFirst<iLast-1 ){
    int iMid = (iFirst+iLast)/2;








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** Inaccuracies in the width estimates might cause columns to be misaligned.
** Unfortunately, there is nothing we can do about that.
*/
int cli_wcwidth(int c){
  int iFirst, iLast;

  /* Fast path for common characters */



  if( c<=0x300 ) return 1;

  /* The general case */
  iFirst = 0;
  iLast = sizeof(aUWidth)/sizeof(aUWidth[0]) - 1;
  while( iFirst<iLast-1 ){
    int iMid = (iFirst+iLast)/2;
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