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// SPDX-License-Identifier: GPL-2.0-only
///
/// Check for opencoded min(), max() implementations.
/// Generated patches sometimes require adding a cast to fix compile warning.
/// Warnings/patches scope intentionally limited to a function body.
///
// Confidence: Medium
// Copyright: (C) 2021 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
//
// Keywords: min, max
//
virtual report
virtual org
virtual context
virtual patch
@max_candidate disable not_int1, not_int2, neg_if_exp@
expression E1, E2, E3, E4;
binary operator cmp = {>, >=};
@@
E1 cmp E2 ? E3 : E4
@min_candidate disable not_int1, not_int2, neg_if_exp@
expression E1, E2, E3, E4;
binary operator cmp = {<, <=};
@@
E1 cmp E2 ? E3 : E4
@rmax depends on !patch && max_candidate disable not_int1, not_int2, neg_if_exp@
identifier func;
expression x, y;
binary operator cmp = {>, >=};
position p;
@@
func(...)
{
<...
* (x) cmp@p (y) ? (x) : (y)
...>
}
@maxif_candidate disable not_int1, not_int2, neg_if@
expression x, y;
expression max_val;
binary operator cmp = {>, >=};
@@
if ((x) cmp (y)) {
max_val = (x);
} else {
max_val = (y);
}
@rmaxif depends on !patch && maxif_candidate disable not_int1, not_int2, neg_if@
identifier func;
expression x, y;
expression max_val;
binary operator cmp = {>, >=};
position p;
@@
func(...)
{
<...
* if ((x) cmp@p (y)) {
* max_val = (x);
* } else {
* max_val = (y);
* }
...>
}
// Ignore errcode returns.
@errcode depends on min_candidate disable not_int1, not_int2, neg_if_exp@
position p;
identifier func;
expression x;
binary operator cmp = {<, <=};
@@
func(...)
{
<...
return ((x) cmp@p 0 ? (x) : 0);
...>
}
@rmin depends on !patch && min_candidate disable not_int1, not_int2, neg_if_exp@
identifier func;
expression x, y;
binary operator cmp = {<, <=};
position p != errcode.p;
@@
func(...)
{
<...
* (x) cmp@p (y) ? (x) : (y)
...>
}
@minif_candidate disable not_int1, not_int2, neg_if@
expression x, y;
expression min_val;
binary operator cmp = {<, <=};
@@
if ((x) cmp (y)) {
min_val = (x);
} else {
min_val = (y);
}
@rminif depends on !patch && minif_candidate disable not_int1, not_int2, neg_if@
identifier func;
expression x, y;
expression min_val;
binary operator cmp = {<, <=};
position p;
@@
func(...)
{
<...
* if ((x) cmp@p (y)) {
* min_val = (x);
* } else {
* min_val = (y);
* }
...>
}
@pmax depends on patch && max_candidate disable not_int1, not_int2, neg_if_exp@
identifier func;
expression x, y;
binary operator cmp = {>=, >};
@@
func(...)
{
<...
- ((x) cmp (y) ? (x) : (y))
+ max(x, y)
...>
}
@pmaxif depends on patch && maxif_candidate disable not_int1, not_int2, neg_if@
identifier func;
expression x, y;
expression max_val;
binary operator cmp = {>=, >};
@@
func(...)
{
<...
- if ((x) cmp (y)) {
- max_val = x;
- } else {
- max_val = y;
- }
+ max_val = max(x, y);
...>
}
@pmin depends on patch && min_candidate disable not_int1, not_int2, neg_if_exp@
identifier func;
expression x, y;
binary operator cmp = {<=, <};
position p != errcode.p;
@@
func(...)
{
<...
- ((x) cmp@p (y) ? (x) : (y))
+ min(x, y)
...>
}
@pminif depends on patch && minif_candidate disable not_int1, not_int2, neg_if@
identifier func;
expression x, y;
expression min_val;
binary operator cmp = {<=, <};
@@
func(...)
{
<...
- if ((x) cmp (y)) {
- min_val = x;
- } else {
- min_val = y;
- }
+ min_val = min(x, y);
...>
}
@script:python depends on report@
p << rmax.p;
@@
for p0 in p:
coccilib.report.print_report(p0, "WARNING opportunity for max()")
@script:python depends on org@
p << rmax.p;
@@
for p0 in p:
coccilib.org.print_todo(p0, "WARNING opportunity for max()")
@script:python depends on report@
p << rmaxif.p;
@@
for p0 in p:
coccilib.report.print_report(p0, "WARNING opportunity for max()")
@script:python depends on org@
p << rmaxif.p;
@@
for p0 in p:
coccilib.org.print_todo(p0, "WARNING opportunity for max()")
@script:python depends on report@
p << rmin.p;
@@
for p0 in p:
coccilib.report.print_report(p0, "WARNING opportunity for min()")
@script:python depends on org@
p << rmin.p;
@@
for p0 in p:
coccilib.org.print_todo(p0, "WARNING opportunity for min()")
@script:python depends on report@
p << rminif.p;
@@
for p0 in p:
coccilib.report.print_report(p0, "WARNING opportunity for min()")
@script:python depends on org@
p << rminif.p;
@@
for p0 in p:
coccilib.org.print_todo(p0, "WARNING opportunity for min()")
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