Mercurial > hg > mlmmj
view src/getaddrsfromfd.c @ 887:3032cb926799 BRANCH_1_2_18
Added tag RELEASE_1_2_18_1 for changeset c1b22b049682
author | Ben Schmidt |
---|---|
date | Wed, 05 Feb 2014 17:14:22 +1100 |
parents | 945ef20e9d08 |
children |
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#include <sys/types.h> #include <sys/mman.h> #include <sys/stat.h> #include <unistd.h> #include <string.h> #include "mlmmj.h" #include "log_error.h" #include "memory.h" #include "strgen.h" #include "getaddrsfromfd.h" off_t getaddrsfromfd(struct strlist *slist, int fd, int max) { off_t offset = lseek(fd, 0, SEEK_CUR); char *start, *cur, *next; struct stat st; size_t len; if(fstat(fd, &st) < 0) { log_error(LOG_ARGS, "Could not fstat fd"); return -1; } /* mmap of 0-bytes is invalid */ if(st.st_size == 0) { return 0; } start = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0); if(start == MAP_FAILED) { log_error(LOG_ARGS, "Could not mmap fd"); return -1; } for(next = cur = (start + offset); next < start + st.st_size; next++) { if(*next == '\n' || next == start + st.st_size - 1) { slist->count++; len = next - cur; if(next == start + st.st_size - 1 && *next != '\n') len++; slist->strs = (char **)myrealloc(slist->strs, sizeof(char *) * slist->count); slist->strs[slist->count - 1] = mymalloc(len + 1); strncpy(slist->strs[slist->count - 1], cur, len); slist->strs[slist->count - 1][len] = '\0'; cur = next + 1; } else { continue; } if(slist->count >= max) { offset = (off_t)(cur - start); goto donegetting; } } offset = st.st_size; donegetting: munmap(start, st.st_size); lseek(fd, offset, SEEK_SET); return st.st_size - offset; }