147 lines
5.5 KiB
ReStructuredText
147 lines
5.5 KiB
ReStructuredText
===========================
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``inifile`` INI File Parser
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===========================
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Syntax
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------
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This directory contains a very simple INI file parser. An INI file consists of a
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sequence of lines up to the end of file. A line may be one of the following:
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1. A blank line.
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2. A comment line. Any line beginning with ``;``
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3. A section header. Definitions are divided into sections. Each section begins
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with a line containing the section name enclosed in square brackets. For
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example, ``[section1]``. The left bracket must be the first character on the
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line. Section names are case insensitive, i.e., ``SECTION1`` and ``Section1``
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refer to the same section.
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4. Variable assignments. A variable assignment is a variable name followed by
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the ``=`` sign and then the value of the variable. For example, ``A=B``: ``A`` is
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the variable name; ``B`` is the variable value. All variables following the
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section header belong in the section.
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Variable names may be preceded with white space. Whitespace is not permitted
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before the ``=`` sign. Variable names are case insensitive, i.e., ``A`` and ``a``
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refer to the same variable name.
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Variable values may be numeric (any base) or a string. The case of string
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arguments is preserved.
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Programming Interfaces
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----------------------
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See ``apps/include/fsutils/inifile.h`` for interfaces supported by the INI file
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parser.
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## Test Program
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Below is a simple test program:
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.. code-block:: C
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int main(int argc, char *argv[])
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{
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INIHANDLE handle;
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FILE *stream;
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FAR char *ptr;
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long value;
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stream = fopen("/tmp/file.ini", "w");
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fprintf(stream, "; Test INI file\n");
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fprintf(stream, "[section1]\n");
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fprintf(stream, " VAR1=1\n");
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fprintf(stream, " VAR2=2\n");
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fprintf(stream, " VAR3=3\n");
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fprintf(stream, "\n");
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fprintf(stream, "[section2]\n");
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fprintf(stream, " VAR4=4\n");
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fprintf(stream, " VAR5=5\n");
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fprintf(stream, "VAR6=6\n");
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fprintf(stream, "\n");
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fclose(stream);
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handle = inifile_initialize("/tmp/file.ini");
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ptr = inifile_read_string(handle, "section2", "VAR5", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section2", "VAR5", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section1", "VAR2", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section1", "VAR2", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section3", "VAR3", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section3", "VAR3", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section1", "VAR3", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section1", "VAR3", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section1", "VAR1", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section1", "VAR1", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section1", "VAR42", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section1", "VAR42", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section2", "VAR6", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section2", "VAR6", ptr);
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inifile_free_string(ptr);
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ptr = inifile_read_string(handle, "section2", "VAR4", "OOPS");
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printf("Section: %s Variable: %s String: %s\n", "section2", "VAR4", ptr);
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inifile_free_string(ptr);
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value = inifile_read_integer(handle, "section1", "VAR3", 0);
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printf("Section: %s Variable: %s Value: %ld\n", "section1", "VAR3", value);
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value = inifile_read_integer(handle, "section3", "VAR3", 0);
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printf("Section: %s Variable: %s String: %ld\n", "section3", "VAR3", value);
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value = inifile_read_integer(handle, "section1", "VAR1", 0);
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printf("Section: %s Variable: %s Value: %ld\n", "section1", "VAR1", value);
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value = inifile_read_integer(handle, "section2", "VAR5", 0);
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printf("Section: %s Variable: %s Value: %ld\n", "section2", "VAR5", value);
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value = inifile_read_integer(handle, "section2", "VAR6", 0);
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printf("Section: %s Variable: %s Value: %ld\n", "section2", "VAR6", value);
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value = inifile_read_integer(handle, "section1", "VAR42", 0);
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printf("Section: %s Variable: %s String: %ld\n", "section1", "VAR42", value);
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value = inifile_read_integer(handle, "section1", "VAR2", 0);
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printf("Section: %s Variable: %s Value: %ld\n", "section1", "VAR2", value);
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value = inifile_read_integer(handle, "section2", "VAR4", 0);
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printf("Section: %s Variable: %s Value: %ld\n", "section2", "VAR4", value);
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inifile_uninitialize(handle);
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return 0;
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}
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Test program output::
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Section: section2 Variable: VAR5 String: 5
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Section: section1 Variable: VAR2 String: 2
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Section: section3 Variable: VAR3 String: OOPS
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Section: section1 Variable: VAR3 String: 3
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Section: section1 Variable: VAR1 String: 1
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Section: section1 Variable: VAR42 String: OOPS
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Section: section2 Variable: VAR6 String: 6
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Section: section2 Variable: VAR4 String: 4
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Section: section1 Variable: VAR3 Value: 3
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Section: section3 Variable: VAR3 Value: 0
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Section: section1 Variable: VAR1 Value: 1
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Section: section2 Variable: VAR5 Value: 5
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Section: section2 Variable: VAR6 Value: 6
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Section: section1 Variable: VAR42 String: 0
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Section: section1 Variable: VAR2 Value: 2
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Section: section2 Variable: VAR4 Value: 4
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