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| Rev 2131 | Rev 2307 | ||
|---|---|---|---|
| Line 41... | Line 41... | ||
| 41 | size_t size; /* total space for string */ |
41 | size_t size; /* total space for string */ |
| 42 | size_t len; /* count of currently used characters */ |
42 | size_t len; /* count of currently used characters */ |
| 43 | char *string; /* destination string */ |
43 | char *string; /* destination string */ |
| 44 | }; |
44 | }; |
| 45 | 45 | ||
| 46 | int vsnprintf_write(const char *str, size_t count, struct vsnprintf_data *data); |
- | |
| 47 | - | ||
| 48 | /** Write string to given buffer. |
46 | /** Write string to given buffer. |
| 49 | * Write at most data->size characters including trailing zero. According to C99 has snprintf to return number |
47 | * Write at most data->size characters including trailing zero. According to C99 has snprintf to return number |
| 50 | * of characters that would have been written if enough space had been available. Hence the return value is not |
48 | * of characters that would have been written if enough space had been available. Hence the return value is not |
| 51 | * number of really printed characters but size of input string. Number of really used characters |
49 | * number of really printed characters but size of input string. Number of really used characters |
| 52 | * is stored in data->len. |
50 | * is stored in data->len. |
| 53 | * @param str source string to print |
51 | * @param str source string to print |
| 54 | * @param count size of source string |
52 | * @param count size of source string |
| 55 | * @param data structure with destination string, counter of used space and total string size. |
53 | * @param data structure with destination string, counter of used space and total string size. |
| 56 | * @return number of characters to print (not characters really printed!) |
54 | * @return number of characters to print (not characters really printed!) |
| 57 | */ |
55 | */ |
| 58 | int vsnprintf_write(const char *str, size_t count, struct vsnprintf_data *data) |
56 | static int vsnprintf_write(const char *str, size_t count, struct vsnprintf_data *data) |
| 59 | { |
57 | { |
| 60 | size_t i; |
58 | size_t i; |
| 61 | i = data->size - data->len; |
59 | i = data->size - data->len; |
| 62 | 60 | ||
| 63 | if (i == 0) { |
61 | if (i == 0) { |
| Line 95... | Line 93... | ||
| 95 | * \see For more details about format string see printf_core. |
93 | * \see For more details about format string see printf_core. |
| 96 | */ |
94 | */ |
| 97 | int vsnprintf(char *str, size_t size, const char *fmt, va_list ap) |
95 | int vsnprintf(char *str, size_t size, const char *fmt, va_list ap) |
| 98 | { |
96 | { |
| 99 | struct vsnprintf_data data = {size, 0, str}; |
97 | struct vsnprintf_data data = {size, 0, str}; |
| 100 | struct printf_spec ps = {(int(*)(void *, size_t, void *))vsnprintf_write, &data}; |
98 | struct printf_spec ps = {(int(*)(void *, size_t, void *)) vsnprintf_write, &data}; |
| 101 | 99 | ||
| 102 | /* Print 0 at end of string - fix the case that nothing will be printed */ |
100 | /* Print 0 at end of string - fix the case that nothing will be printed */ |
| 103 | if (size > 0) |
101 | if (size > 0) |
| 104 | str[0] = 0; |
102 | str[0] = 0; |
| 105 | 103 | ||