backend/nodes cleanup: Move loop variables definitions into for statement

Author: Chao Li (Evan) <lic@highgo.com>
Discussion: https://www.postgresql.org/message-id/flat/CAEoWx2nP12qwAaiJutbn1Kw50atN6FbMJNQ4bh4%2BfP_Ay_u7Eg%40mail.gmail.com

diff --git a/src/backend/nodes/bitmapset.c b/src/backend/nodes/bitmapset.c
index b4ecf0b0390179481e3aad8228294d4e45c126dc..7b1e9d94103f8979f39c851146d62c386bc2a1b4 100644 (file)
--- a/src/backend/nodes/bitmapset.c
+++ b/src/backend/nodes/bitmapset.c
@@ -538,7 +538,6 @@ bms_is_member(int x, const Bitmapset *a)
 int
 bms_member_index(Bitmapset *a, int x)
 {
-   int         i;
    int         bitnum;
    int         wordnum;
    int         result = 0;
@@ -554,7 +553,7 @@ bms_member_index(Bitmapset *a, int x)
    bitnum = BITNUM(x);
 
    /* count bits in preceding words */
-   for (i = 0; i < wordnum; i++)
+   for (int i = 0; i < wordnum; i++)
    {
        bitmapword  w = a->words[i];
 
@@ -1306,7 +1305,6 @@ int
 bms_next_member(const Bitmapset *a, int prevbit)
 {
    int         nwords;
-   int         wordnum;
    bitmapword  mask;
 
    Assert(bms_is_valid_set(a));
@@ -1316,7 +1314,7 @@ bms_next_member(const Bitmapset *a, int prevbit)
    nwords = a->nwords;
    prevbit++;
    mask = (~(bitmapword) 0) << BITNUM(prevbit);
-   for (wordnum = WORDNUM(prevbit); wordnum < nwords; wordnum++)
+   for (int wordnum = WORDNUM(prevbit); wordnum < nwords; wordnum++)
    {
        bitmapword  w = a->words[wordnum];
 
@@ -1366,7 +1364,6 @@ bms_next_member(const Bitmapset *a, int prevbit)
 int
 bms_prev_member(const Bitmapset *a, int prevbit)
 {
-   int         wordnum;
    int         ushiftbits;
    bitmapword  mask;
 
@@ -1391,7 +1388,7 @@ bms_prev_member(const Bitmapset *a, int prevbit)
 
    ushiftbits = BITS_PER_BITMAPWORD - (BITNUM(prevbit) + 1);
    mask = (~(bitmapword) 0) >> ushiftbits;
-   for (wordnum = WORDNUM(prevbit); wordnum >= 0; wordnum--)
+   for (int wordnum = WORDNUM(prevbit); wordnum >= 0; wordnum--)
    {
        bitmapword  w = a->words[wordnum];
 

diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c
index ede838cd40c46a7b7e8df8f1d14678f7c0156ee3..d228318dc72efa515422b55cd55898c39d52f0eb 100644 (file)
--- a/src/backend/nodes/nodeFuncs.c
+++ b/src/backend/nodes/nodeFuncs.c
@@ -4826,9 +4826,7 @@ planstate_walk_members(PlanState **planstates, int nplans,
                       planstate_tree_walker_callback walker,
                       void *context)
 {
-   int         j;
-
-   for (j = 0; j < nplans; j++)
+   for (int j = 0; j < nplans; j++)
    {
        if (PSWALK(planstates[j]))
            return true;

diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index d9fe21a07e0794eb7d5f683b44d2be75b2999d51..0abca9f803b74c65c79bb5b45250f1c21e169dd7 100644 (file)
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -346,8 +346,7 @@ outBitmapset(StringInfo str, const Bitmapset *bms)
 void
 outDatum(StringInfo str, Datum value, int typlen, bool typbyval)
 {
-   Size        length,
-               i;
+   Size        length;
    char       *s;
 
    length = datumGetSize(value, typbyval, typlen);
@@ -356,7 +355,7 @@ outDatum(StringInfo str, Datum value, int typlen, bool typbyval)
    {
        s = (char *) (&value);
        appendStringInfo(str, "%u [ ", (unsigned int) length);
-       for (i = 0; i < (Size) sizeof(Datum); i++)
+       for (Size i = 0; i < (Size) sizeof(Datum); i++)
            appendStringInfo(str, "%d ", (int) (s[i]));
        appendStringInfoChar(str, ']');
    }
@@ -368,7 +367,7 @@ outDatum(StringInfo str, Datum value, int typlen, bool typbyval)
        else
        {
            appendStringInfo(str, "%u [ ", (unsigned int) length);
-           for (i = 0; i < length; i++)
+           for (Size i = 0; i < length; i++)
                appendStringInfo(str, "%d ", (int) (s[i]));
            appendStringInfoChar(str, ']');
        }
@@ -434,8 +433,6 @@ _outBoolExpr(StringInfo str, const BoolExpr *node)
 static void
 _outForeignKeyOptInfo(StringInfo str, const ForeignKeyOptInfo *node)
 {
-   int         i;
-
    WRITE_NODE_TYPE("FOREIGNKEYOPTINFO");
 
    WRITE_UINT_FIELD(con_relid);
@@ -450,10 +447,10 @@ _outForeignKeyOptInfo(StringInfo str, const ForeignKeyOptInfo *node)
    WRITE_INT_FIELD(nmatched_ri);
    /* for compactness, just print the number of matches per column: */
    appendStringInfoString(str, " :eclass");
-   for (i = 0; i < node->nkeys; i++)
+   for (int i = 0; i < node->nkeys; i++)
        appendStringInfo(str, " %d", (node->eclass[i] != NULL));
    appendStringInfoString(str, " :rinfos");
-   for (i = 0; i < node->nkeys; i++)
+   for (int i = 0; i < node->nkeys; i++)
        appendStringInfo(str, " %d", list_length(node->rinfos[i]));
 }
 

diff --git a/src/backend/nodes/params.c b/src/backend/nodes/params.c
index ec5946c5777dcb29363950e8aba955b8866ee944..aeb8ace2c5419817648b62aa7c168b6b3b759b15 100644 (file)
--- a/src/backend/nodes/params.c
+++ b/src/backend/nodes/params.c
@@ -166,13 +166,12 @@ paramlist_param_ref(ParseState *pstate, ParamRef *pref)
 Size
 EstimateParamListSpace(ParamListInfo paramLI)
 {
-   int         i;
    Size        sz = sizeof(int);
 
    if (paramLI == NULL || paramLI->numParams <= 0)
        return sz;
 
-   for (i = 0; i < paramLI->numParams; i++)
+   for (int i = 0; i < paramLI->numParams; i++)
    {
        ParamExternData *prm;
        ParamExternData prmdata;
@@ -229,7 +228,6 @@ void
 SerializeParamList(ParamListInfo paramLI, char **start_address)
 {
    int         nparams;
-   int         i;
 
    /* Write number of parameters. */
    if (paramLI == NULL || paramLI->numParams <= 0)
@@ -240,7 +238,7 @@ SerializeParamList(ParamListInfo paramLI, char **start_address)
    *start_address += sizeof(int);
 
    /* Write each parameter in turn. */
-   for (i = 0; i < nparams; i++)
+   for (int i = 0; i < nparams; i++)
    {
        ParamExternData *prm;
        ParamExternData prmdata;

diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index 2f933e95cb95e949e69455a80df69eac0b2f5419..9a8ca27ec10cd7db966b3ad440f874cb9a438caf 100644 (file)
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -599,8 +599,7 @@ parseNodeString(void)
 Datum
 readDatum(bool typbyval)
 {
-   Size        length,
-               i;
+   Size        length;
    int         tokenLength;
    const char *token;
    Datum       res;
@@ -623,7 +622,7 @@ readDatum(bool typbyval)
            elog(ERROR, "byval datum but length = %zu", length);
        res = (Datum) 0;
        s = (char *) (&res);
-       for (i = 0; i < (Size) sizeof(Datum); i++)
+       for (Size i = 0; i < (Size) sizeof(Datum); i++)
        {
            token = pg_strtok(&tokenLength);
            s[i] = (char) atoi(token);
@@ -634,7 +633,7 @@ readDatum(bool typbyval)
    else
    {
        s = (char *) palloc(length);
-       for (i = 0; i < length; i++)
+       for (Size i = 0; i < length; i++)
        {
            token = pg_strtok(&tokenLength);
            s[i] = (char) atoi(token);

diff --git a/src/backend/nodes/tidbitmap.c b/src/backend/nodes/tidbitmap.c
index 23d97b3a6c8f717298afc98d111f2b741dd2c4f9..1f83d0d55f5283ef3752994e83db23519e6830d3 100644 (file)
--- a/src/backend/nodes/tidbitmap.c
+++ b/src/backend/nodes/tidbitmap.c
@@ -369,10 +369,9 @@ tbm_add_tuples(TIDBitmap *tbm, const ItemPointerData *tids, int ntids,
 {
    BlockNumber currblk = InvalidBlockNumber;
    PagetableEntry *page = NULL;    /* only valid when currblk is valid */
-   int         i;
 
    Assert(tbm->iterating == TBM_NOT_ITERATING);
-   for (i = 0; i < ntids; i++)
+   for (int i = 0; i < ntids; i++)
    {
        BlockNumber blk = ItemPointerGetBlockNumber(tids + i);
        OffsetNumber off = ItemPointerGetOffsetNumber(tids + i);
@@ -471,12 +470,11 @@ static void
 tbm_union_page(TIDBitmap *a, const PagetableEntry *bpage)
 {
    PagetableEntry *apage;
-   int         wordnum;
 
    if (bpage->ischunk)
    {
        /* Scan b's chunk, mark each indicated page lossy in a */
-       for (wordnum = 0; wordnum < WORDS_PER_CHUNK; wordnum++)
+       for (int wordnum = 0; wordnum < WORDS_PER_CHUNK; wordnum++)
        {
            bitmapword  w = bpage->words[wordnum];
 
@@ -511,7 +509,7 @@ tbm_union_page(TIDBitmap *a, const PagetableEntry *bpage)
        else
        {
            /* Both pages are exact, merge at the bit level */
-           for (wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
+           for (int wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
                apage->words[wordnum] |= bpage->words[wordnum];
            apage->recheck |= bpage->recheck;
        }
@@ -579,14 +577,13 @@ static bool
 tbm_intersect_page(TIDBitmap *a, PagetableEntry *apage, const TIDBitmap *b)
 {
    const PagetableEntry *bpage;
-   int         wordnum;
 
    if (apage->ischunk)
    {
        /* Scan each bit in chunk, try to clear */
        bool        candelete = true;
 
-       for (wordnum = 0; wordnum < WORDS_PER_CHUNK; wordnum++)
+       for (int wordnum = 0; wordnum < WORDS_PER_CHUNK; wordnum++)
        {
            bitmapword  w = apage->words[wordnum];
 
@@ -640,7 +637,7 @@ tbm_intersect_page(TIDBitmap *a, PagetableEntry *apage, const TIDBitmap *b)
        {
            /* Both pages are exact, merge at the bit level */
            Assert(!bpage->ischunk);
-           for (wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
+           for (int wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
            {
                apage->words[wordnum] &= bpage->words[wordnum];
                if (apage->words[wordnum] != 0)
@@ -904,10 +901,9 @@ tbm_extract_page_tuple(TBMIterateResult *iteritem,
                       uint32 max_offsets)
 {
    PagetableEntry *page = iteritem->internal_page;
-   int         wordnum;
    int         ntuples = 0;
 
-   for (wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
+   for (int wordnum = 0; wordnum < WORDS_PER_PAGE; wordnum++)
    {
        bitmapword  w = page->words[wordnum];