static string ReadSectionTitle(StringView input)
{
#if SHARE_INTERNAL_METHODS
input.TrimWhitespace();
if (input.Length < 1 || input[0] != '[')
{
throw new Exception("Not a section");
}
#endif
input.Move(1);
string title = ReadStringUntil(input, ']');
input.TrimWhitespace();
if (input.Length != 0)
{
if (input[0] != '\n')
{
throw new Exception($"Unexpected char at offset {input.offset}. Expected line-break");
}
input.Move(1);
}
return(title);
}
static string ReadStringUntil(StringView input, char endChar, bool acceptEOF = false)
{
StringBuilder sb = new StringBuilder();
while (input.Length > 0)
{
char c = input[0];
input.Move(1);
if (c == endChar)
{
return(sb.ToString());
}
if (c == '\n')
{
throw new Exception($"Unexpected end of line. Expected char '{endChar}' at offset {input.offset}");
}
sb.Append(c);
}
if (acceptEOF)
{
return(sb.ToString());
}
throw new Exception($"Unexpected end of string. Waiting for char '{endChar}'");
}
static INIFile ReadINI(StringView input, ParseOptions options)
{
var sections = new INIFile();
INISection currentSection = null;
string currentSectionTitle = null;
while (input.Length != 0)
{
if (options.lineStartCommentChars.Contains(input[0]))
{
ReadStringUntil(input, '\n', acceptEOF: true);
continue;
}
input.TrimWhitespace();
switch (input[0])
{
case '\n':
input.Move(1);
continue;
case '[':
var sectionTitle = ReadSectionTitle(input);
AddSection(sectionTitle);
break;
default:
var(key, value) = ReadKeyValue(input, options);
AddKey(key, value);
break;
}
}
return(sections);
void NewSection(string name)
{
currentSection = new INISection();
currentSectionTitle = name;
sections[name] = currentSection;
}
void AddSection(string name)
{
if (!sections.ContainsKey(name))
{
NewSection(name);
return;
}
switch (options.multiSectionMode)
{
case MultiSectionMode.DISALLOW:
throw new Exception($"Section '{name}' was already declared");
case MultiSectionMode.IGNORE:
currentSection = null;
currentSectionTitle = null;
return;
case MultiSectionMode.REPLACE:
NewSection(name);
break;
case MultiSectionMode.MERGE:
currentSection = sections[name];
break;
}
}
void AddKey(string key, string value)
{
if (currentSection == null)
{
if (sections.Count != 0)
{
return;
}
if (options.initialSectionName == null)
{
throw new Exception("Keys outside of a section");
}
AddSection(options.initialSectionName);
}
if (!currentSection.ContainsKey(key))
{
currentSection[key] = value;
return;
}
switch (options.multiKeyMode)
{
case MultiKeyMode.DISALLOW:
throw new Exception($"Key '{key}' in section '{currentSectionTitle}' already exists");
case MultiKeyMode.IGNORE:
return;
case MultiKeyMode.OVERRIDE:
currentSection[key] = value;
break;
}
}
}