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add strcompress function and use it for error output

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This commit is contained in:
Axel Kohlmeyer
2025-01-17 22:59:44 -05:00
parent e350f28e26
commit e38c13a764
4 changed files with 75 additions and 12 deletions
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3
doc/src/Developer_utils.rst
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@ -133,6 +133,9 @@ and parsing files or arguments.
.. doxygenfunction:: trim_comment
:project: progguide
.. doxygenfunction:: strcompress
:project: progguide
.. doxygenfunction:: strip_style_suffix
:project: progguide

32
src/utils.cpp
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@ -119,8 +119,8 @@ bool utils::strsame(const std::string &text1, const std::string &text2)
while (*ptr1 && *ptr2) {
// ignore whitespace
while (*ptr1 && isblank(*ptr1)) ++ptr1;
while (*ptr2 && isblank(*ptr2)) ++ptr2;
while (*ptr1 && isspace(*ptr1)) ++ptr1;
while (*ptr2 && isspace(*ptr2)) ++ptr2;
// strings differ
if (*ptr1 != *ptr2) return false;
@ -134,6 +134,32 @@ bool utils::strsame(const std::string &text1, const std::string &text2)
return true;
}
std::string utils::strcompress(const std::string &text)
{
const char *ptr = text.c_str();
std::string output;
// remove leading whitespace
while (*ptr && isspace(*ptr)) ++ptr;
while (*ptr) {
// copy non-blank characters
while (*ptr && !isspace(*ptr)) output += *ptr++;
if (!*ptr) break;
// add one blank only
if (isspace(*ptr)) output += ' ';
// skip additional blanks
while (*ptr && isspace(*ptr)) ++ptr;
}
// remove trailing blank
if (output.back() == ' ') output.erase(output.size() - 1, 1);
return output;
}
/** This function is a companion function to utils::strmatch(). Arguments
* and logic is the same, but instead of a boolean, it returns the
* sub-string that matches the regex pattern. There can be only one match.
@ -158,7 +184,7 @@ void utils::missing_cmd_args(const std::string &file, int line, const std::strin
std::string utils::point_to_error(Input *input, int failed)
{
if (input) {
std::string lastline = input->line;
std::string lastline = utils::strcompress(input->line);
std::string lastargs = input->command;
std::string cmdline = "Last input line: ";

7
src/utils.h
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@ -49,6 +49,13 @@ namespace utils {
bool strsame(const std::string &text1, const std::string &text2);
/*! Compress whitespace in a string
*
* \param text the text to be compressed
* \return string with whitespace compressed to single blanks */
std::string strcompress(const std::string &text);
/*! Find sub-string that matches a simplified regex pattern
*
* \param text the text to be matched against the pattern

37
unittest/utils/test_utils.cpp
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@ -50,16 +50,43 @@ TEST(Utils, strsame)
{
std::string text1("some_text");
std::string text2("some_text");
ASSERT_TRUE(utils::strsame(text1,text2));
ASSERT_TRUE(utils::strsame(text1, text2));
text1 = " some _\ttext\n ";
ASSERT_TRUE(utils::strsame(text1,text2));
ASSERT_TRUE(utils::strsame(text1, text2));
text2 = " some _ text\n ";
ASSERT_TRUE(utils::strsame(text1,text2));
ASSERT_TRUE(utils::strsame(text1, text2));
text2 = "some_other_text";
ASSERT_FALSE(utils::strsame(text1,text2));
ASSERT_FALSE(utils::strsame(text1, text2));
text2 = " some other_text";
ASSERT_FALSE(utils::strsame(text1,text2));
ASSERT_FALSE(utils::strsame(text1, text2));
}
TEST(Utils, strcompress)
{
auto compressed = utils::strcompress("\t some text ");
ASSERT_THAT(compressed, StrEq("some text"));
compressed = utils::strcompress("some \ntext");
ASSERT_THAT(compressed, StrEq("some text"));
compressed = utils::strcompress("sometext");
ASSERT_THAT(compressed, StrEq("sometext"));
compressed = utils::strcompress("some text \r\n");
ASSERT_THAT(compressed, StrEq("some text"));
compressed = utils::strcompress("some other text \r\n");
ASSERT_THAT(compressed, StrEq("some other text"));
compressed = utils::strcompress("\v some text \f");
ASSERT_THAT(compressed, StrEq("some text"));
compressed = utils::strcompress(" some\t text ");
ASSERT_THAT(compressed, StrEq("some text"));
compressed = utils::strcompress(" \t\n ");
ASSERT_THAT(compressed, StrEq(""));
}
TEST(Utils, trim)