54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
#include <string.h>
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#include "util.h"
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#include "streamtypes.h"
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const char* filename_extension(const char* pathname) {
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const char* extension;
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/* favor strrchr (optimized/aligned) rather than homemade loops */
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extension = strrchr(pathname,'.');
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if (extension != NULL) {
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/* probably has extension */
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extension++; /* skip dot */
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/* find possible separators to avoid misdetecting folders with dots + extensionless files
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* (after the above to reduce search space, allows both slashes in case of non-normalized names) */
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if (strchr(extension, '/') == NULL && strchr(extension, '\\') == NULL)
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return extension; /* no slashes = really has extension */
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}
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/* extensionless: point to null after current name
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* (could return NULL but prev code expects with to return an actual c-string) */
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return pathname + strlen(pathname);
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}
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int round10(int val) {
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int round_val = val % 10;
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if (round_val < 5) /* half-down rounding */
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return val - round_val;
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else
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return val + (10 - round_val);
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}
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/* length is maximum length of dst. dst will always be null-terminated if
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* length > 0 */
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void concatn(int length, char * dst, const char * src) {
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int i,j;
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if (length <= 0) return;
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for (i=0;i<length-1 && dst[i];i++); /* find end of dst */
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for (j=0;i<length-1 && src[j];i++,j++)
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dst[i]=src[j];
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dst[i]='\0';
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}
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size_t align_size_to_block(size_t value, size_t block_align) {
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if (!block_align)
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return 0;
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size_t extra_size = value % block_align;
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if (extra_size == 0) return value;
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return (value + block_align - extra_size);
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}
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