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New .sprintf function
git-svn-id: svn://svn.cc65.org/cc65/trunk@3508 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
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@ -37,7 +37,9 @@
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#include <string.h>
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/* common */
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#include "chartype.h"
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#include "check.h"
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#include "strbuf.h"
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/* ca65 */
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#include "error.h"
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@ -59,6 +61,29 @@ static unsigned RawMode = 0; /* Raw token mode flag/counter */
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/*****************************************************************************/
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/* Error handling */
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/*****************************************************************************/
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static int LookAtStrCon (void)
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/* Make sure the next token is a string constant. If not, print an error
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* messages skip the remainder of the line and return false. Otherwise return
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* true.
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*/
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{
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if (Tok != TOK_STRCON) {
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Error ("String constant expected");
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SkipUntilSep ();
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return 0;
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} else {
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return 1;
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}
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}
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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@ -135,9 +160,7 @@ static void FuncConcat (void)
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while (1) {
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/* Next token must be a string */
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if (Tok != TOK_STRCON) {
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Error ("String constant expected");
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SkipUntilSep ();
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if (!LookAtStrCon ()) {
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return;
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}
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@ -248,9 +271,7 @@ static void FuncIdent (void)
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ConsumeLParen ();
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/* The function expects a string argument */
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if (Tok != TOK_STRCON) {
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Error ("String constant expected");
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SkipUntilSep ();
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if (!LookAtStrCon ()) {
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return;
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}
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@ -410,6 +431,216 @@ static void FuncRight (void)
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static void InvalidFormatString (void)
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/* Print an error message and skip the remainder of the line */
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{
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Error ("Invalid format string");
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SkipUntilSep ();
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}
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static void FuncSPrintF (void)
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/* Handle the .SPRINTF function */
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{
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char Format[sizeof (SVal)]; /* User given format */
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const char* F = Format; /* User format pointer */
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StrBuf R = AUTO_STRBUF_INITIALIZER; /* Result string */
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StrBuf F1 = AUTO_STRBUF_INITIALIZER; /* One format spec from F */
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StrBuf R1 = AUTO_STRBUF_INITIALIZER; /* One result */
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int Done;
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long IVal; /* Integer value */
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/* Skip the .SPRINTF token */
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NextTok ();
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/* Left paren expected */
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ConsumeLParen ();
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/* First argument is a format string. Remember and skip it */
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if (!LookAtStrCon ()) {
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return;
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}
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strcpy (Format, SVal);
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NextTok ();
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/* Walk over the format string, generating the function result in R */
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while (1) {
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/* Get the next char from the format string and check for EOS */
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if (*F == '\0') {
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break;
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}
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/* Check for a format specifier */
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if (*F != '%') {
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/* No format specifier, just copy */
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SB_AppendChar (&R, *F++);
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continue;
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}
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if (*++F == '%') {
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/* %% */
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SB_AppendChar (&R, '%');
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++F;
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continue;
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}
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if (*F == '\0') {
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InvalidFormatString ();
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break;
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}
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/* Since a format specifier follows, we do expect anotehr argument for
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* the .sprintf function.
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*/
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ConsumeComma ();
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/* We will copy the format spec into F1 checking for the things we
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* support, and later use xsprintf to do the actual formatting. This
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* is easier than adding another printf implementation...
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*/
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SB_Clear (&F1);
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SB_AppendChar (&F1, '%');
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/* Check for flags */
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Done = 0;
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while (*F != '\0' && !Done) {
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switch (*F) {
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case '-': /* FALLTHROUGH */
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case '+': /* FALLTHROUGH */
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case ' ': /* FALLTHROUGH */
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case '#': /* FALLTHROUGH */
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case '0': SB_AppendChar (&F1, *F++); break;
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default: Done = 1; break;
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}
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}
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/* We do only support a numerical width field */
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while (IsDigit (*F)) {
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SB_AppendChar (&F1, *F++);
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}
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/* Precision - only positive numerical fields supported */
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if (*F == '.') {
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SB_AppendChar (&F1, *F++);
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while (IsDigit (*F)) {
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SB_AppendChar (&F1, *F++);
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}
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}
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/* Length modifiers aren't supported, so read the conversion specs */
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switch (*F) {
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case 'd':
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case 'i':
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case 'o':
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case 'u':
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case 'X':
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case 'x':
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/* Our ints are actually longs, so we use the 'l' modifier when
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* calling xsprintf later. Terminate the format string.
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*/
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SB_AppendChar (&F1, 'l');
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SB_AppendChar (&F1, *F++);
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SB_Terminate (&F1);
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/* The argument must be a constant expression */
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IVal = ConstExpression ();
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/* Format this argument according to the spec */
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SB_Printf (&R1, SB_GetConstBuf (&F1), IVal);
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/* Append the formatted argument to the result */
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SB_Append (&R, &R1);
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break;
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case 's':
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/* Add the format spec and terminate the format */
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SB_AppendChar (&F1, *F++);
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SB_Terminate (&F1);
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/* The argument must be a string constant */
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if (!LookAtStrCon ()) {
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/* Make it one */
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strcpy (SVal, "**undefined**");
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}
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/* Format this argument according to the spec */
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SB_Printf (&R1, SB_GetConstBuf (&F1), SVal);
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/* Skip the string constant */
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NextTok ();
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/* Append the formatted argument to the result */
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SB_Append (&R, &R1);
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break;
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case 'c':
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/* Add the format spec and terminate the format */
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SB_AppendChar (&F1, *F++);
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SB_Terminate (&F1);
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/* The argument must be a constant expression */
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IVal = ConstExpression ();
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/* Check for a valid character range */
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if (IVal <= 0 || IVal > 255) {
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Error ("Char argument out of range");
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IVal = ' ';
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}
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/* Format this argument according to the spec. Be sure to pass
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* an int as the char value.
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*/
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SB_Printf (&R1, SB_GetConstBuf (&F1), (int) IVal);
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/* Append the formatted argument to the result */
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SB_Append (&R, &R1);
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break;
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default:
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Error ("Invalid format string");
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if (*F) {
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/* Don't skip beyond end of string */
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++F;
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}
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break;
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}
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}
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/* The length of the final result may not exceed the size of a string */
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if (SB_GetLen (&R) >= sizeof (SVal)) {
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Error ("Resulting string is too long");
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SB_Cut (&R, sizeof (SVal) - 1);
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}
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/* Terminate the result string */
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SB_Terminate (&R);
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/* We expect a closing parenthesis, but will not skip it but replace it
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* by the string token just created.
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*/
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if (Tok != TOK_RPAREN) {
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Error ("`)' expected");
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} else {
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Tok = TOK_STRCON;
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memcpy (SVal, SB_GetConstBuf (&R), SB_GetLen (&R) + 1);
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}
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/* Delete the string buffers */
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DoneStrBuf (&R);
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DoneStrBuf (&F1);
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DoneStrBuf (&R1);
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}
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static void FuncString (void)
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/* Handle the .STRING function */
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{
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@ -477,6 +708,10 @@ void NextTok (void)
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FuncRight ();
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break;
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case TOK_SPRINTF:
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FuncSPrintF ();
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break;
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case TOK_STRING:
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FuncString ();
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break;
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@ -1774,6 +1774,7 @@ static CtrlDesc CtrlCmdTab [] = {
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{ ccNone, DoSetCPU },
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{ ccNone, DoUnexpected }, /* .SIZEOF */
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{ ccNone, DoSmart },
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{ ccNone, DoUnexpected }, /* .SPRINTF */
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{ ccNone, DoUnexpected }, /* .STRAT */
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{ ccNone, DoUnexpected }, /* .STRING */
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{ ccNone, DoUnexpected }, /* .STRLEN */
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@ -6,7 +6,7 @@
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/* */
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/* */
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/* */
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/* (C) 1998-2004 Ullrich von Bassewitz */
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/* (C) 1998-2005 Ullrich von Bassewitz */
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/* Römerstraße 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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@ -241,6 +241,7 @@ struct DotKeyword {
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{ ".SHR", TOK_SHR },
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{ ".SIZEOF", TOK_SIZEOF },
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{ ".SMART", TOK_SMART },
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{ ".SPRINTF", TOK_SPRINTF },
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{ ".STRAT", TOK_STRAT },
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{ ".STRING", TOK_STRING },
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{ ".STRLEN", TOK_STRLEN },
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@ -228,6 +228,7 @@ enum Token {
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TOK_SETCPU,
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TOK_SIZEOF,
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TOK_SMART,
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TOK_SPRINTF,
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TOK_STRAT,
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TOK_STRING,
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TOK_STRLEN,
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