Dqn/dqn_cpp_file.h

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#if !defined(DQN_CPP_FILE_H)
#define DQN_CPP_FILE_H
#include <stdio.h>
#include <stdarg.h>
// -----------------------------------------------------------------------------
// NOTE: Dqn_CppFile: Helper functions to generate formatted CPP files
// -----------------------------------------------------------------------------
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#define DQN_CPPF_ASSERT(expr) do { if (!(expr)) { *((int volatile *)0) = 0; } } while (0)
struct Dqn_CppFile
{
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FILE *file;
int indent;
int space_per_indent;
bool append_extra_new_line;
};
int Dqn_CppFSpacePerIndent(Dqn_CppFile *cpp);
void Dqn_CppFLineBeginV (Dqn_CppFile *cpp, char const *fmt, va_list args);
void Dqn_CppFLineBegin (Dqn_CppFile *cpp, char const *fmt, ...);
void Dqn_CppFLineEnd (Dqn_CppFile *cpp, char const *fmt, ...);
void Dqn_CppFLineAdd (Dqn_CppFile *cpp, char const *fmt, ...);
void Dqn_CppFLineV (Dqn_CppFile *cpp, char const *fmt, va_list args);
void Dqn_CppFLine (Dqn_CppFile *cpp, char const *fmt, ...);
void Dqn_CppFNewLine (Dqn_CppFile *cpp);
void Dqn_CppFIndent (Dqn_CppFile *cpp);
void Dqn_CppFUnindent (Dqn_CppFile *cpp);
// fmt: (Optional) The format string to print at the beginning of the block.
// When the fmt string is given, it will place a new-line at the end of the fmt
// string. When fmt is nullptr, no new line will be appended.
void Dqn_CppFBeginBlock (Dqn_CppFile *cpp, char const *fmt, ...);
void Dqn_CppFEndBlock (Dqn_CppFile *cpp, bool trailing_semicolon, bool new_line_on_next_block);
#define Dqn_CppFEndEnumBlock(cpp) Dqn_CppFEndBlock(cpp, true /*trailing_semicolon*/, true /*new_line_on_next_block*/)
#define Dqn_CppFEndForBlock(cpp) Dqn_CppFEndBlock(cpp, false /*trailing_semicolon*/, false /*new_line_on_next_block*/)
#define Dqn_CppFEndIfBlock(cpp) Dqn_CppFEndBlock(cpp, false /*trailing_semicolon*/, false /*new_line_on_next_block*/)
#define Dqn_CppFEndFuncBlock(cpp) Dqn_CppFEndBlock(cpp, false /*trailing_semicolon*/, true /*new_line_on_next_block*/)
#define Dqn_CppFEndStructBlock(cpp) Dqn_CppFEndBlock(cpp, true /*trailing_semicolon*/, true /*new_line_on_next_block*/)
#endif // DQN_CPP_FILE_H
#if defined(DQN_CPP_FILE_IMPLEMENTATION)
// -----------------------------------------------------------------------------
// NOTE: Dqn_CppFile Implementation
// -----------------------------------------------------------------------------
int Dqn_CppFSpacePerIndent(Dqn_CppFile *cpp)
{
int result = cpp->space_per_indent == 0 ? 4 : cpp->space_per_indent;
return result;
}
void Dqn_CppFLineBeginV(Dqn_CppFile *cpp, char const *fmt, va_list args)
{
int spaces = cpp->indent * Dqn_CppFSpacePerIndent(cpp);
fprintf(cpp->file, "%*s", spaces, "");
vfprintf(cpp->file, fmt, args);
}
void Dqn_CppFLineBegin(Dqn_CppFile *cpp, char const *fmt, ...)
{
va_list args;
va_start(args, fmt);
Dqn_CppFLineBeginV(cpp, fmt, args);
va_end(args);
}
void Dqn_CppFLineEnd(Dqn_CppFile *cpp, char const *fmt, ...)
{
if (fmt)
{
va_list args;
va_start(args, fmt);
vfprintf(cpp->file, fmt, args);
va_end(args);
}
fputc('\n', cpp->file);
}
void Dqn_CppFLineAdd(Dqn_CppFile *cpp, char const *fmt, ...)
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{
va_list args;
va_start(args, fmt);
vfprintf(cpp->file, fmt, args);
va_end(args);
}
void Dqn_CppFLineV(Dqn_CppFile *cpp, char const *fmt, va_list args)
{
Dqn_CppFLineBeginV(cpp, fmt, args);
Dqn_CppFLineEnd(cpp, nullptr);
}
void Dqn_CppFLine(Dqn_CppFile *cpp, char const *fmt, ...)
{
va_list args;
va_start(args, fmt);
Dqn_CppFLineBeginV(cpp, fmt, args);
Dqn_CppFLineEnd(cpp, nullptr);
va_end(args);
}
void Dqn_CppFNewLine(Dqn_CppFile *cpp)
{
fputc('\n', cpp->file);
}
void Dqn_CppFIndent(Dqn_CppFile *cpp)
{
cpp->indent++;
}
void Dqn_CppFUnindent(Dqn_CppFile *cpp)
{
cpp->indent--;
DQN_CPPF_ASSERT(cpp->indent >= 0);
}
void Dqn_CppFBeginBlock(Dqn_CppFile *cpp, char const *fmt, ...)
{
if (fmt)
{
va_list args;
va_start(args, fmt);
Dqn_CppFLineV(cpp, fmt, args);
va_end(args);
}
Dqn_CppFLine(cpp, "{");
Dqn_CppFIndent(cpp);
}
void Dqn_CppFEndBlock(Dqn_CppFile *cpp, bool trailing_semicolon, bool new_line_on_next_block)
{
Dqn_CppFUnindent(cpp);
Dqn_CppFLine(cpp, trailing_semicolon ? "};" : "}");
if (new_line_on_next_block) fputc('\n', cpp->file);
}
#endif // DQN_CPP_FILE_IMPLEMENTATION