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StringOps.h
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StringOps.h
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//----------------------------------------------------------------------------------------------------------------------
// String related routines
// Copyright (c) 2024 Samuel Gomes
//----------------------------------------------------------------------------------------------------------------------
#pragma once
#include "Common.h"
#include "Types.h"
#include <cstdint>
#include <cstring>
#include <cctype>
#include <cstdio>
#include <regex>
/// @brief Used for formatting strings.
/// @tparam T The type of the value to format.
/// @param value The value to format.
/// @param fmt The format specifier.
/// @return A formatted string.
template <typename T>
inline const char *__String_Format(const T &value, const char *fmt)
{
g_TmpBuf[0] = '\0';
snprintf(reinterpret_cast<char *>(g_TmpBuf), sizeof(g_TmpBuf), fmt, value);
return reinterpret_cast<char *>(g_TmpBuf);
}
/// @brief Gets a string form of the boolean value passed
/// @param n A boolean value
/// @param fmt The format type needed
/// @return A string form of the boolean value
inline const char *String_FormatBoolean(int32_t n, uint32_t fmt)
{
static const char *const BOOLEAN_STRINGS[][2] = {
{"False", "True"},
{"0", "1"},
{"0", "-1"},
{"Off", "On"},
{"Disabled", "Enabled"},
{"Disable", "Enable"},
{"No", "Yes"},
{"Low", "High"},
{"Closed", "Opened"},
{"Close", "Open"},
{"Inactive", "Active"},
{"Absent", "Present"},
{"Disengaged", "Engaged"},
{"Disengage", "Engage"},
{"Disconnected", "Connected"},
{"Disconnect", "Connect"},
{"Invalid", "Valid"},
{"Down", "Up"},
{"Stopped", "Started"},
{"Stop", "Start"},
{"Unavailable", "Available"},
{"Out", "In"}};
return BOOLEAN_STRINGS[fmt < GET_ARRAY_SIZE(BOOLEAN_STRINGS) ? fmt : 0][n != 0];
}
/// @brief Check if the character is an alphanumeric character
/// @param ch The character to check
/// @return True if the character is an alphanumeric character
inline qb_bool String_IsAlphaNumeric(uint32_t ch)
{
return TO_QB_BOOL(std::isalnum(ch));
}
/// @brief Check if the character is an alphabetic character
/// @param ch The character to check
/// @return True if the character is an alphabetic character
inline qb_bool String_IsAlphabetic(uint32_t ch)
{
return TO_QB_BOOL(std::isalpha(ch));
}
/// @brief Check if the character is a lowercase character
/// @param ch The character to check
/// @return True if the character is a lowercase character
inline qb_bool String_IsLowerCase(uint32_t ch)
{
return TO_QB_BOOL(std::islower(ch));
}
/// @brief Check if the character is an uppercase character
/// @param ch The character to check
/// @return True if the character is an uppercase character
inline qb_bool String_IsUpperCase(uint32_t ch)
{
return TO_QB_BOOL(std::isupper(ch));
}
/// @brief Check if the character is a numeric character
/// @param ch The character to check
/// @return True if the character is a numeric character
inline qb_bool String_IsDigit(uint32_t ch)
{
return TO_QB_BOOL(std::isdigit(ch));
}
/// @brief Check if the character is a hexadecimal numeric character
/// @param ch The character to check
/// @return True if the character is a hexadecimal numeric character
inline qb_bool String_IsHexadecimalDigit(uint32_t ch)
{
return TO_QB_BOOL(std::isxdigit(ch));
}
/// @brief Check if the character is a control character
/// @param ch The character to check
/// @return True if the character is a control character
inline qb_bool String_IsControlCharacter(uint32_t ch)
{
return TO_QB_BOOL(std::iscntrl(ch));
}
/// @brief Check if the character has a graphical representation
/// @param ch The character to check
/// @return True if the character has a graphical representation
inline qb_bool String_IsGraphicalCharacter(uint32_t ch)
{
return TO_QB_BOOL(std::isgraph(ch));
}
/// @brief Check if the character is a white-space character
/// @param ch The character to check
/// @return True if the character is white-space character
inline qb_bool String_IsWhiteSpace(uint32_t ch)
{
return TO_QB_BOOL(std::isspace(ch));
}
/// @brief Check if the character is a blank character
/// @param ch The character to check
/// @return True if the character is a blank character
inline qb_bool String_IsBlank(uint32_t ch)
{
return TO_QB_BOOL(std::isblank(ch));
}
/// @brief Check if the character can be printed
/// @param ch The character to check
/// @return True if the character can be printed
inline qb_bool String_IsPrintable(uint32_t ch)
{
return TO_QB_BOOL(std::isprint(ch));
}
/// @brief Check if the character is a punctuation character
/// @param ch The character to check
/// @return True if the character is a punctuation character
inline qb_bool String_IsPunctuation(uint32_t ch)
{
return TO_QB_BOOL(std::ispunct(ch));
}
/// @brief Compiles a RegEx and returns a context
/// @param pattern A RegEx pattern
/// @return A RegEx context
inline uintptr_t __String_RegExCompile(const char *pattern)
{
try
{
auto regexPtr = new std::regex(pattern);
return reinterpret_cast<uintptr_t>(regexPtr);
}
catch (const std::regex_error &e)
{
return 0; // return null context on error
}
}
/// @brief Frees resources for a compiled pattern
/// @param pattern A RegEx context
inline void String_RegExFree(uintptr_t pattern)
{
if (pattern)
{
delete reinterpret_cast<std::regex *>(pattern);
}
}
/// @brief Searches of a occurrence of a compiled pattern in `text`
/// @param pattern A RegEx context
/// @param text The string to search
/// @param index The position in the string to start searching
/// @param matchLength The length of the match [output]
/// @return Starting position of the match (>= 0) or a negative value indicating the error
inline int32_t __String_RegExSearchCompiled(uintptr_t pattern, const char *text, int32_t index, int32_t *matchLength)
{
if (!pattern)
return -2; // invalid context
auto regexPtr = reinterpret_cast<std::regex *>(pattern);
std::cmatch cm;
// Convert index to size_t for regex_search
auto startIndex = static_cast<size_t>(index) - 1; // QB string index starts at 1
if (std::regex_search(text + startIndex, cm, *regexPtr))
{
*matchLength = static_cast<int32_t>(cm.length());
return static_cast<int32_t>(cm.position()); // return the starting position of the match (must be adjusted on the QB64 side!!!)
}
return -1; // no match found
}
/// @brief Searches for an occurrence of a pattern in `text`
/// @param pattern A RegEx pattern
/// @param text The string to search
/// @param index The position in the string to start searching
/// @param matchLength The length of the match [output]
/// @return Starting position of the match (>= 0) or a negative value indicating the error
inline int32_t __String_RegExSearch(const char *pattern, const char *text, int32_t index, int32_t *matchLength)
{
auto compiledPattern = __String_RegExCompile(pattern);
auto result = __String_RegExSearchCompiled(compiledPattern, text, index, matchLength);
String_RegExFree(compiledPattern); // clean up compiled context
return result;
}
/// @brief Checks if `text` is a RegEx match
/// @param pattern A RegEx context
/// @param text The string to match
/// @return True if it is a match. False otherwise
inline qb_bool __String_RegExMatchCompiled(uintptr_t pattern, const char *text)
{
if (!pattern)
return QB_FALSE; // invalid context
auto regexPtr = reinterpret_cast<std::regex *>(pattern);
return TO_QB_BOOL(std::regex_match(text, *regexPtr));
}
/// @brief Checks if `text` is a RegEx match
/// @param pattern A RegEx pattern
/// @param text The string to match
/// @return True if it is a match. False otherwise
inline qb_bool __String_RegExMatch(const char *pattern, const char *text)
{
uintptr_t compiledPattern = __String_RegExCompile(pattern);
auto result = __String_RegExMatchCompiled(compiledPattern, text);
String_RegExFree(compiledPattern); // clean up compiled context
return result;
}