Difference between revisions of "MB ElementCount"
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| index = 0x1163 | | index = 0x1163 | ||
| signature = int MB_ElementCount(char* buf) | | signature = int MB_ElementCount(char* buf) | ||
| − | | synopsis = Counts the number of characters, as printed on screen, of a multi-byte string. | + | | synopsis = Counts the number of characters, as printed on screen, of a [[Multi-byte_strings|multi-byte string]]. |
| parameters = * '''buf''' - pointer to the string to measure. | | parameters = * '''buf''' - pointer to the string to measure. | ||
| returns = The number of characters in the string, as printed by multi-byte-aware syscalls. | | returns = The number of characters in the string, as printed by multi-byte-aware syscalls. | ||
Revision as of 08:08, 4 August 2014
Contents
Synopsis
Header: fxcg/system.h
Syscall index: 0x1163
Function signature: int MB_ElementCount(char* buf)
Counts the number of characters, as printed on screen, of a multi-byte string.
Parameters
- buf - pointer to the string to measure.
Returns
The number of characters in the string, as printed by multi-byte-aware syscalls.
Example
The following example shows how a multi-byte string can take a memory space that's twice as large as the number of printed characters, and demonstrates how to count both size in bytes and graphical size:
char MBstring[10]; strcpy(MBstring, (char*)"\xe6\x92\xe6\x93\xe6\xa5"); int bytelen = strlen(MBstring); // bytelen has a value of 6 int elemlen = MB_ElementCount(MBstring); // elemlen has a value of 3 locate_OS(2,3); Print_OS(MBstring, 0, 0); // will print three symbols on screen: an arrow up, an arrow down and a square.
Another example, which mixes standard and multi-byte characters:
char MBstring[10]; strcpy(MBstring, (char*)"Empty box: \xe6\xa5"); int bytelen = strlen(MBstring); // bytelen has a value of 13 int elemlen = MB_ElementCount(MBstring); // elemlen has a value of 12 locate_OS(2,3); Print_OS(MBstring, 0, 0); // will print "Empty box: " followed by a square.
