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Overview
Comment:Add docs and tests for the TH1 'string index' command added by check-in [0c57ba3eb4]. Also, fix issue with handling of the special 'end' index.
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SHA3-256:e9845e590456d23b168ec24ecdacf4e00bf071fecff65197f16f99af6d4fed5b
User & Date: mistachkin 2017-10-02 15:23:48
Context
2017-10-02
16:25
Avoid large SQL inserts when computing the path between two check-ins for use by reverse annotation. check-in: 5eba557c user: drh tags: trunk
15:23
Add docs and tests for the TH1 'string index' command added by check-in [0c57ba3eb4]. Also, fix issue with handling of the special 'end' index. check-in: e9845e59 user: mistachkin tags: trunk
12:22
More fixes to reverse annotation via the /fdiff page. It is closer, but it is still not right. check-in: 08cacbf6 user: drh tags: trunk
Changes
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Changes to src/th_lang.c.

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  int iIndex;

  if( argc!=4 ){
    return Th_WrongNumArgs(interp, "string index string index");
  }

  if( argl[3]==3 && 0==memcmp("end", argv[3], 3) ){
    iIndex = argl[2];
  }else if( Th_ToInt(interp, argv[3], argl[3], &iIndex) ){
    Th_ErrorMessage(
        interp, "Expected \"end\" or integer, got:", argv[3], argl[3]);
    return TH_ERROR;
  }

  if( iIndex>=0 && iIndex<argl[2] ){







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  int iIndex;

  if( argc!=4 ){
    return Th_WrongNumArgs(interp, "string index string index");
  }

  if( argl[3]==3 && 0==memcmp("end", argv[3], 3) ){
    iIndex = argl[2]-1;
  }else if( Th_ToInt(interp, argv[3], argl[3], &iIndex) ){
    Th_ErrorMessage(
        interp, "Expected \"end\" or integer, got:", argv[3], argl[3]);
    return TH_ERROR;
  }

  if( iIndex>=0 && iIndex<argl[2] ){

Changes to test/th1.test.

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fossil test-th-eval {string is integer 0xC0DEF00D}
test th1-string-is-30 {$RESULT eq "1"}

###############################################################################

fossil test-th-eval {string is integer 0xC0DEF00Z}
test th1-string-is-31 {$RESULT eq "0"}












































































###############################################################################

fossil test-th-eval {markdown}
test th1-markdown-1 {$RESULT eq \
{TH_ERROR: wrong # args: should be "markdown STRING"}}








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fossil test-th-eval {string is integer 0xC0DEF00D}
test th1-string-is-30 {$RESULT eq "1"}

###############################################################################

fossil test-th-eval {string is integer 0xC0DEF00Z}
test th1-string-is-31 {$RESULT eq "0"}

###############################################################################

fossil test-th-eval {string index "" -1}
test th1-string-index-1 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index "" 0}
test th1-string-index-2 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index "" 1}
test th1-string-index-3 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index "" 2}
test th1-string-index-4 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index "" end}
test th1-string-index-5 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index A -1}
test th1-string-index-6 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index A 0}
test th1-string-index-7 {$RESULT eq "A"}

###############################################################################

fossil test-th-eval {string index A 1}
test th1-string-index-8 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index A 2}
test th1-string-index-9 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index A end}
test th1-string-index-10 {$RESULT eq "A"}

###############################################################################

fossil test-th-eval {string index ABC -1}
test th1-string-index-11 {$RESULT eq ""}

###############################################################################

fossil test-th-eval {string index ABC 0}
test th1-string-index-12 {$RESULT eq "A"}

###############################################################################

fossil test-th-eval {string index ABC 1}
test th1-string-index-13 {$RESULT eq "B"}

###############################################################################

fossil test-th-eval {string index ABC 2}
test th1-string-index-14 {$RESULT eq "C"}

###############################################################################

fossil test-th-eval {string index ABC end}
test th1-string-index-15 {$RESULT eq "C"}

###############################################################################

fossil test-th-eval {markdown}
test th1-markdown-1 {$RESULT eq \
{TH_ERROR: wrong # args: should be "markdown STRING"}}

Changes to www/th1.md.

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  *  lsearch LIST STRING
  *  proc NAME ARG-LIST BODY-SCRIPT
  *  rename OLD NEW
  *  return ?-code CODE? ?VALUE?
  *  set VARNAME VALUE
  *  string compare STR1 STR2
  *  string first NEEDLE HAYSTACK ?START-INDEX?

  *  string is CLASS STRING
  *  string last NEEDLE HAYSTACK ?START-INDEX?
  *  string length STRING
  *  string range STRING FIRST LAST
  *  string repeat STRING COUNT
  *  unset VARNAME
  *  uplevel ?LEVEL? SCRIPT







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  *  lsearch LIST STRING
  *  proc NAME ARG-LIST BODY-SCRIPT
  *  rename OLD NEW
  *  return ?-code CODE? ?VALUE?
  *  set VARNAME VALUE
  *  string compare STR1 STR2
  *  string first NEEDLE HAYSTACK ?START-INDEX?
  *  string index STRING INDEX
  *  string is CLASS STRING
  *  string last NEEDLE HAYSTACK ?START-INDEX?
  *  string length STRING
  *  string range STRING FIRST LAST
  *  string repeat STRING COUNT
  *  unset VARNAME
  *  uplevel ?LEVEL? SCRIPT