| 11 |
} |
} |
| 12 |
} |
} |
| 13 |
|
|
| 14 |
|
void trim(char ** string) { |
| 15 |
|
|
| 16 |
|
// string length and loop variable |
| 17 |
|
int string_length, i; |
| 18 |
|
|
| 19 |
|
// contains current character at string position i |
| 20 |
|
char current_char[2]; |
| 21 |
|
|
| 22 |
|
// pointers to begin end tail of new (stripped) string |
| 23 |
|
char * begin; |
| 24 |
|
char * tail; |
| 25 |
|
|
| 26 |
|
// prepare to be used with "strcmp" (comparison string should be terminated properly) |
| 27 |
|
current_char[1] = '\0'; |
| 28 |
|
|
| 29 |
|
|
| 30 |
|
/***************************** |
| 31 |
|
* 1. strip leading spaces |
| 32 |
|
**/ |
| 33 |
|
begin = *string; |
| 34 |
|
string_length = strlen(*string); |
| 35 |
|
|
| 36 |
|
// loop through all string characters (from left to right) |
| 37 |
|
for (i = 0; i < string_length; i++) { |
| 38 |
|
|
| 39 |
|
// get character at position i |
| 40 |
|
current_char[0] = *(*string + i); |
| 41 |
|
|
| 42 |
|
// is it a space? then increase pointer to begin of "new" string |
| 43 |
|
if (strcmp(current_char, " ") == 0) { |
| 44 |
|
begin++; |
| 45 |
|
} else { |
| 46 |
|
break; |
| 47 |
|
} |
| 48 |
|
} |
| 49 |
|
*string = begin; |
| 50 |
|
|
| 51 |
|
|
| 52 |
|
/***************************** |
| 53 |
|
* 2. strip trailing spaces |
| 54 |
|
**/ |
| 55 |
|
|
| 56 |
|
// calculate new string length |
| 57 |
|
string_length = strlen(*string); |
| 58 |
|
|
| 59 |
|
// loop through all string characters (from right to left) |
| 60 |
|
for (i = 0; i < string_length - 1; i++) { |
| 61 |
|
|
| 62 |
|
// get character at position string_length - i |
| 63 |
|
tail = *string + string_length - 1 - i; |
| 64 |
|
current_char[0] = *tail; |
| 65 |
|
|
| 66 |
|
// is it a space? then set null-byte to indicate end of "new" string at current position |
| 67 |
|
if (strcmp(current_char, " ") == 0) { |
| 68 |
|
*tail = '\0'; |
| 69 |
|
} else { |
| 70 |
|
break; |
| 71 |
|
} |
| 72 |
|
} |
| 73 |
|
|
| 74 |
|
} |
| 75 |
|
|
| 76 |
|
|
| 77 |
// checks for errors and writes its message to stderr |
// checks for errors and writes its message to stderr |
| 78 |
BOOL check_alert_error(const char * error_source) { |
BOOL check_alert_error(const char * error_source) { |
| 79 |
DWORD dwError = GetLastError(); |
DWORD dwError = GetLastError(); |
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