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| <a name="Macros-1"></a> |
| <h4 class="subsection">9.42.10 Macros</h4> |
| |
| <a name="index-TIC54X_002dspecific-macros"></a> |
| <a name="index-macros_002c-TIC54X"></a> |
| <p>Macros do not require explicit dereferencing of arguments (i.e., \ARG). |
| </p> |
| <p>During macro expansion, the macro parameters are converted to subsyms. |
| If the number of arguments passed the macro invocation exceeds the |
| number of parameters defined, the last parameter is assigned the string |
| equivalent of all remaining arguments. If fewer arguments are given |
| than parameters, the missing parameters are assigned empty strings. To |
| include a comma in an argument, you must enclose the argument in quotes. |
| </p> |
| <a name="index-subsym-builtins_002c-TIC54X"></a> |
| <a name="index-TIC54X-subsym-builtins"></a> |
| <a name="index-builtin-subsym-functions_002c-TIC54X"></a> |
| <p>The following built-in subsym functions allow examination of the string |
| value of subsyms (or ordinary strings). The arguments are strings |
| unless otherwise indicated (subsyms passed as args will be replaced by |
| the strings they represent). |
| </p><dl compact="compact"> |
| <dd><a name="index-_0024symlen-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$symlen(<var>str</var>)</code></code></dt> |
| <dd><p>Returns the length of <var>str</var>. |
| </p> |
| <a name="index-_0024symcmp-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$symcmp(<var>str1</var>,<var>str2</var>)</code></code></dt> |
| <dd><p>Returns 0 if <var>str1</var> == <var>str2</var>, non-zero otherwise. |
| </p> |
| <a name="index-_0024firstch-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$firstch(<var>str</var>,<var>ch</var>)</code></code></dt> |
| <dd><p>Returns index of the first occurrence of character constant <var>ch</var> in |
| <var>str</var>. |
| </p> |
| <a name="index-_0024lastch-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$lastch(<var>str</var>,<var>ch</var>)</code></code></dt> |
| <dd><p>Returns index of the last occurrence of character constant <var>ch</var> in |
| <var>str</var>. |
| </p> |
| <a name="index-_0024isdefed-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$isdefed(<var>symbol</var>)</code></code></dt> |
| <dd><p>Returns zero if the symbol <var>symbol</var> is not in the symbol table, |
| non-zero otherwise. |
| </p> |
| <a name="index-_0024ismember-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$ismember(<var>symbol</var>,<var>list</var>)</code></code></dt> |
| <dd><p>Assign the first member of comma-separated string <var>list</var> to |
| <var>symbol</var>; <var>list</var> is reassigned the remainder of the list. Returns |
| zero if <var>list</var> is a null string. Both arguments must be subsyms. |
| </p> |
| <a name="index-_0024iscons-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$iscons(<var>expr</var>)</code></code></dt> |
| <dd><p>Returns 1 if string <var>expr</var> is binary, 2 if octal, 3 if hexadecimal, |
| 4 if a character, 5 if decimal, and zero if not an integer. |
| </p> |
| <a name="index-_0024isname-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$isname(<var>name</var>)</code></code></dt> |
| <dd><p>Returns 1 if <var>name</var> is a valid symbol name, zero otherwise. |
| </p> |
| <a name="index-_0024isreg-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$isreg(<var>reg</var>)</code></code></dt> |
| <dd><p>Returns 1 if <var>reg</var> is a valid predefined register name (AR0-AR7 only). |
| </p> |
| <a name="index-_0024structsz-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$structsz(<var>stag</var>)</code></code></dt> |
| <dd><p>Returns the size of the structure or union represented by <var>stag</var>. |
| </p> |
| <a name="index-_0024structacc-subsym-builtin_002c-TIC54X"></a> |
| </dd> |
| <dt><code><code>$structacc(<var>stag</var>)</code></code></dt> |
| <dd><p>Returns the reference point of the structure or union represented by |
| <var>stag</var>. Always returns zero. |
| </p> |
| </dd> |
| </dl> |
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