1 /*****************************************************************************/
5 /* String expressions for the ca65 macroassembler */
9 /* (C) 2000 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
45 /*****************************************************************************/
47 /*****************************************************************************/
51 const char* StringExpression (void)
52 /* Evaluate a string expression. If there are no errors, the function will
53 * place the string into the token attribute buffer SVal and the token will
54 * be TOK_STRCON. A pointer to the buffer is returned.
55 * If there was an error, a NULL pointer is returned.
58 char Buf [sizeof (SVal)];
60 /* Check for a string constant or a function that returns a string */
66 if (Tok == TOK_IDENT) {
67 /* Save the identifier, then skip it */
71 /* Numeric expression */
72 long Val = ConstExpression ();
73 sprintf (Buf, "%ld", Val);
75 if (Tok != TOK_RPAREN) {
76 Error (ERR_RPAREN_EXPECTED);
78 /* Overwrite the token, do not skip it! */
84 /* We already have a string */
88 /* Error - no string constant */
92 /* Return a pointer to the buffer */