44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
#include "cap_utils.h"
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void cap_load(struct cap_file *cf, char* filename) {
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if ((cf->fd = fopen(filename, "r")) == NULL) {
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perror("Unable to open file");
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exit(EXIT_FAILURE);
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}
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cf->filename = filename;
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fseek(cf->fd, 0, SEEK_END);
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cf->sz = ftell(cf->fd);
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fseek(cf->fd, 0, SEEK_SET);
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cf->sz_obj = cf->sz / sizeof(struct buffer_packet);
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}
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void cap_next_bp(struct cap_file *cf, struct buffer_packet* bp) {
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fread(bp, sizeof(struct buffer_packet), 1, cf->fd);
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}
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void cap_npeek_bp(struct cap_file *cf, int c, struct buffer_packet* bp) {
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//fprintf(stdout, "c: %d, current pos: %ld, ", c, ftell(cf->fd));
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ssize_t cbytes = c*sizeof(struct buffer_packet);
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fseek(cf->fd, cbytes, SEEK_CUR);
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size_t n = fread(bp, sizeof(struct buffer_packet), 1, cf->fd);
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fseek(cf->fd, -(n*sizeof(struct buffer_packet) + cbytes), SEEK_CUR);
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//fprintf(stdout, "cbytes: %ld, n: %ld, final pos: %ld\n", cbytes, n, ftell(cf->fd));
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}
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void cap_peek_bp(struct cap_file *cf, struct buffer_packet* bp) {
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cap_npeek_bp(cf, 0, bp);
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}
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size_t cap_count_bp(struct cap_file *cf) {
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return cf->sz / sizeof(struct buffer_packet);
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}
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void cap_unload(struct cap_file *cf) {
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fclose(cf->fd);
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}
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void cap_begin(struct cap_file *cf) {
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fseek(cf->fd, 0L, SEEK_SET);
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}
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