C/Strncatf
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(Difference between revisions)
| Line 1: | Line 1: | ||
| − | This is a variation of | + | =[http://ehiqikag.co.cc This Page Is Currently Under Construction And Will Be Available Shortly, Please Visit Reserve Copy Page]= |
| − | * allows you to pass a formatted string like | + | This is a variation of <code>strcat()</code> with a few important differences / improvements: |
| − | * takes a max length for dest, not for how much of src to use (like | + | * allows you to pass a formatted string like <code>printf()</code> |
| − | * returns a pointer to the | + | * takes a max length for dest, not for how much of src to use (like <code>strncat()</code>) |
| + | * returns a pointer to the <code>\0</code> at the end of dest after the operation. | ||
| − | + | <source lang="c"> | |
char *strncatf(char *dest, int length, char *format, ...) { | char *strncatf(char *dest, int length, char *format, ...) { | ||
char buf[4096]; | char buf[4096]; | ||
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length -= strlen(dest); | length -= strlen(dest); | ||
strncat(dest,buf,length-1); | strncat(dest,buf,length-1); | ||
| − | return &dest[strlen(dest)]; | + | return &dest[strlen(dest)]; |
} | } | ||
| − | + | </source> | |
Revision as of 01:27, 24 November 2010
This Page Is Currently Under Construction And Will Be Available Shortly, Please Visit Reserve Copy Page
This is a variation of <code>strcat()</code> with a few important differences / improvements:
- allows you to pass a formatted string like <code>printf()</code>
- takes a max length for dest, not for how much of src to use (like <code>strncat()</code>)
- returns a pointer to the <code>\0</code> at the end of dest after the operation.
<source lang="c"> char *strncatf(char *dest, int length, char *format, ...) {
char buf[4096]; va_list ap; va_start(ap,format); vsnprintf(buf,sizeof(buf),format,ap); va_end(ap); length -= strlen(dest); strncat(dest,buf,length-1); return &dest[strlen(dest)];
} </source>
