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- The expression "defined(SCST_IO_CONTEXT)" is now replaced by "1".

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- The following two lines and the first blank line below are now removed:
  +#define SCSI_EXEC_REQ_FIFO_DEFINED
  +#define SCST_IO_CONTEXT
- Hunks that do no longer contain any modifications because of the 
  previous steps are now removed from the output because patch otherwise
  complains.
- Added support for evaluating expressions containing the arithmetic
  operators *, /, +, -.
- Removed support for partial evaluation of expressions because it is too
  tricky to get this right due to operator precedence.


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@1047 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2009-08-14 18:26:58 +00:00
parent e6bd69006a
commit 2232922dd9
1 changed files with 68 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files

97
scripts/specialize-patch
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@@ -94,6 +94,9 @@ function evaluate(stmnt) {
gsub("defined *SCSI_EXEC_REQ_FIFO_DEFINED", "1", stmnt)
gsub("defined *\\( *SCSI_EXEC_REQ_FIFO_DEFINED *\\)", "1", stmnt)
gsub("defined *SCST_IO_CONTEXT", "1", stmnt)
gsub("defined *\\( *SCST_IO_CONTEXT *\\)", "1", stmnt)
do
{
last_stmnt = stmnt
@@ -110,7 +113,25 @@ function evaluate(stmnt) {
sub(pattern, op[1] * 65536 + op[2] * 256 + op[3], stmnt)
}
pattern="([0-9]+) *(<|<=|>|>=|==) *([0-9]+)"
pattern="(-*[0-9]+) *(\\*|/) *(-*[0-9]+)"
while (match(stmnt, pattern, op) != 0)
{
result="error"
if (op[2] == "*") result = op[1] * op[3]
else if (op[2] == "/" && op[3] != 0) result = op[1] / op[3]
sub(pattern, result, stmnt)
}
pattern="(-*[0-9]+) *(\\+|-) *(-*[0-9]+)"
while (match(stmnt, pattern, op) != 0)
{
result="error"
if (op[2] == "+") result = op[1] * op[3]
else if (op[2] == "-") result = op[1] / op[3]
sub(pattern, result, stmnt)
}
pattern="(-*[0-9]+) *(<|<=|>|>=|==) *(-*[0-9]+)"
while (match(stmnt, pattern, op) != 0)
{
result="error"
@@ -122,31 +143,19 @@ function evaluate(stmnt) {
sub(pattern, result, stmnt)
}
pattern="([0-9]+) *\\&\\& *([0-9]+)"
pattern="(-*[0-9]+) *\\&\\& *(-*[0-9]+)"
while (match(stmnt, pattern, op) != 0)
{
sub(pattern, (op[1] != 0) && (op[2] != 0), stmnt)
}
pattern="([0-9]+) *\\&\\& *(!* *defined\\([^)]*\\))"
while (match(stmnt, pattern, op) != 0)
{
sub(pattern, (op[1] != 0) ? op[2] : "0", stmnt)
}
pattern="([0-9]+) *\\|\\| *([0-9]+)"
pattern="(-*[0-9]+) *\\|\\| *(-*[0-9]+)"
while (match(stmnt, pattern, op) != 0)
{
sub(pattern, (op[1] != 0) || (op[2] != 0), stmnt)
}
pattern="([0-9]+) *\\|\\| *(!* *defined\\([^)]*\\))"
while (match(stmnt, pattern, op) != 0)
{
sub(pattern, (op[1] != 0) ? "1" : op[2], stmnt)
}
pattern="\\(([0-9]+)\\)"
pattern="\\((-*[0-9]+)\\)"
while (match(stmnt, pattern, op) != 0)
{
sub(pattern, op[1], stmnt)
@@ -174,7 +183,9 @@ function handle_if()
|| $0 ~ "INSIDE_KERNEL_TREE" \
|| $0 ~ "RHEL_MAJOR" \
|| $0 ~ "RHEL_MINOR" \
|| $0 ~ "RHEL_RELEASE_CODE")
|| $0 ~ "RHEL_RELEASE_CODE" \
|| $0 ~ "SCSI_EXEC_REQ_FIFO_DEFINED" \
|| $0 ~ "SCST_IO_CONTEXT")
{
#print $0 " -> " evaluated
$0 = evaluated
@@ -238,21 +249,39 @@ function process_preprocessor_statement() {
}
}
if (output && (! condition || condition && matching_if !~ "^+#if [01]") \
&& ! (evaluated ~ "^+#define SCSI_EXEC_REQ_FIFO_DEFINED$"))
&& evaluated !~ "^+#define SCSI_EXEC_REQ_FIFO_DEFINED$" \
&& evaluated !~ "^+#define SCST_IO_CONTEXT$")
{
line[lines++]=$0
delete_next_blank_line = 0
}
else
{
lines_deleted++
delete_next_blank_line = 1
}
}
function dump_lines() {
if (h[0] != "")
printf "@@ -%d,%d +%d,%d @@%s\n",h[1],h[2],h[3],h[4]-lines_deleted,h[5]
# Detect empty hunks
first_modif = -1
for (i = 0; i < lines; i++)
{
if (line[i] ~ "^[+-]")
{
first_modif = i
break
}
}
# Dump line[] as a hunk, but only if the hunk is not empty.
if (first_modif >= 0)
{
if (h[0] != "")
printf "@@ -%d,%d +%d,%d @@%s\n",h[1],h[2],h[3],h[4]-lines_deleted,h[5]
for (i = 0; i < lines; i++)
print line[i]
}
lines = 0
lines_deleted = 0
}
@@ -276,6 +305,7 @@ BEGIN {
lines_deleted = 0
output = 1
if_nesting_level = -1
delete_next_blank_line = 0
}
@@ -288,19 +318,28 @@ BEGIN {
dump_lines()
match($0, "^@@ -([0-9]*),([0-9]*) \\+([0-9]*),([0-9]*) @@(.*)$", h)
}
else if (match($0, "^+ *#"))
else if (delete_next_blank_line && match($0, "^+$"))
{
process_preprocessor_statement()
}
else if (output)
{
# Store the line that was just read.
line[lines++]=$0
lines_deleted++
delete_next_blank_line = 0
}
else
{
# Discard the last read line.
lines_deleted++
delete_next_blank_line = 0
if (match($0, "^+ *#"))
{
process_preprocessor_statement()
}
else if (output)
{
# Store the line that was just read.
line[lines++]=$0
}
else
{
# Discard the last read line.
lines_deleted++
}
}
}