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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 3122 of file ast_expr2f.c.
03123 { 03124 struct parse_io io; 03125 int return_value = 0; 03126 03127 memset(&io, 0, sizeof(io)); 03128 io.string = expr; /* to pass to the error routine */ 03129 03130 ast_yylex_init(&io.scanner); 03131 03132 ast_yy_scan_string(expr, io.scanner); 03133 03134 ast_yyparse ((void *) &io); 03135 03136 ast_yylex_destroy(io.scanner); 03137 03138 if (!io.val) { 03139 if (length > 1) { 03140 strcpy(buf, "0"); 03141 return_value = 1; 03142 } 03143 } else { 03144 if (io.val->type == AST_EXPR_integer) { 03145 int res_length; 03146 03147 res_length = snprintf(buf, length, "%ld", (long int) io.val->u.i); 03148 return_value = (res_length <= length) ? res_length : length; 03149 } else { 03150 #if defined(STANDALONE) || defined(LOW_MEMORY) || defined(STANDALONE_AEL) 03151 strncpy(buf, io.val->u.s, length - 1); 03152 #else /* !STANDALONE && !LOW_MEMORY */ 03153 ast_copy_string(buf, io.val->u.s, length); 03154 #endif /* STANDALONE || LOW_MEMORY */ 03155 return_value = strlen(buf); 03156 free(io.val->u.s); 03157 } 03158 free(io.val); 03159 } 03160 return return_value; 03161 }