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rewrite ParseCStringVector in terms of stringref.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82348 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-09-20 01:33:46 +00:00
parent 05a32c8ab1
commit b7b71a37a1
1 changed files with 21 additions and 32 deletions
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53
lib/Support/CommandLine.cpp
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@ -296,42 +296,31 @@ static bool EatsUnboundedNumberOfValues(const Option *O) {
/// using strdup(), so it is the caller's responsibility to free()
/// them later.
///
static void ParseCStringVector(std::vector<char *> &output,
const char *input) {
static void ParseCStringVector(std::vector<char *> &OutputVector,
const char *Input) {
// Characters which will be treated as token separators:
static const char *const delims = " \v\f\t\r\n";
StringRef Delims = " \v\f\t\r\n";
std::string work(input);
// Skip past any delims at head of input string.
size_t pos = work.find_first_not_of(delims);
// If the string consists entirely of delims, then exit early.
if (pos == std::string::npos) return;
// Otherwise, jump forward to beginning of first word.
work = work.substr(pos);
// Find position of first delimiter.
pos = work.find_first_of(delims);
while (!work.empty() && pos != std::string::npos) {
// Everything from 0 to POS is the next word to copy.
output.push_back(strdup(work.substr(0,pos).c_str()));
// Is there another word in the string?
size_t nextpos = work.find_first_not_of(delims, pos + 1);
if (nextpos != std::string::npos) {
// Yes? Then remove delims from beginning ...
work = work.substr(work.find_first_not_of(delims, pos + 1));
// and find the end of the word.
pos = work.find_first_of(delims);
} else {
// No? (Remainder of string is delims.) End the loop.
work = "";
pos = std::string::npos;
StringRef WorkStr(Input);
while (!WorkStr.empty()) {
// If the first character is a delimiter, strip them off.
if (Delims.find(WorkStr[0]) != StringRef::npos) {
size_t Pos = WorkStr.find_first_not_of(Delims);
if (Pos == StringRef::npos) Pos = WorkStr.size();
WorkStr = WorkStr.substr(Pos);
continue;
}
// Find position of first delimiter.
size_t Pos = WorkStr.find_first_of(Delims);
if (Pos == StringRef::npos) Pos = WorkStr.size();
// Everything from 0 to Pos is the next word to copy.
char *NewStr = (char*)malloc(Pos+1);
memcpy(NewStr, WorkStr.data(), Pos);
NewStr[Pos] = 0;
OutputVector.push_back(NewStr);
}
// If `input' ended with non-delim char, then we'll get here with
// the last word of `input' in `work'; copy it now.
if (!work.empty())
output.push_back(strdup(work.c_str()));
}
/// ParseEnvironmentOptions - An alternative entry point to the