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Functions | |
int | ast_expr (char *expr, char *buf, int length) |
int ast_expr | ( | char * | expr, | |
char * | buf, | |||
int | length | |||
) |
Definition at line 3107 of file ast_expr2f.c.
03108 { 03109 struct parse_io io; 03110 int return_value = 0; 03111 03112 memset(&io, 0, sizeof(io)); 03113 io.string = expr; /* to pass to the error routine */ 03114 03115 ast_yylex_init(&io.scanner); 03116 03117 ast_yy_scan_string(expr, io.scanner); 03118 03119 ast_yyparse ((void *) &io); 03120 03121 ast_yylex_destroy(io.scanner); 03122 03123 if (!io.val) { 03124 if (length > 1) { 03125 strcpy(buf, "0"); 03126 return_value = 1; 03127 } 03128 } else { 03129 if (io.val->type == AST_EXPR_integer) { 03130 int res_length; 03131 03132 res_length = snprintf(buf, length, "%ld", (long int) io.val->u.i); 03133 return_value = (res_length <= length) ? res_length : length; 03134 } else { 03135 #if defined(STANDALONE) || defined(LOW_MEMORY) || defined(STANDALONE_AEL) 03136 strncpy(buf, io.val->u.s, length - 1); 03137 #else /* !STANDALONE && !LOW_MEMORY */ 03138 ast_copy_string(buf, io.val->u.s, length); 03139 #endif /* STANDALONE || LOW_MEMORY */ 03140 return_value = strlen(buf); 03141 free(io.val->u.s); 03142 } 03143 free(io.val); 03144 } 03145 return return_value; 03146 }