openreadclose(3) Library Functions Manual openreadclose(3)NAME
openreadclose - read a whole file into a stralloc
SYNTAX
#include <openreadclose.h>
int openreadclose(const char *filename,
stralloc* sa,size_t bufsize);
DESCRIPTION
openreadclose opens the file filename for reading and reads the whole content into the stralloc sa. The file is read in chunks of bufsize
bytes size. If everything worked fine, openreadclose returns 1. If the file did not exist, openreadclose returns 0. On every other
error, openreadclose returns -1 and sets errno appropriately.
SEE ALSO open_read(3), readclose(3)openreadclose(3)
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stralloc(3) Library Functions Manual stralloc(3)NAME
stralloc - dynamically allocated strings
SYNTAX
#include <stralloc.h>
int stralloc_ready(&sa,len);
int stralloc_readyplus(&sa,len);
int stralloc_copy(&sa,&sa2);
int stralloc_copys(&sa,buf);
int stralloc_copyb(&sa,buf,len);
int stralloc_cat(&sa,&sa2);
int stralloc_cats(&sa,buf);
int stralloc_catb(&sa,buf,len);
int stralloc_append(&sa,buf);
int stralloc_0(&sa);
int stralloc_starts(&sa,buf);
stralloc sa = {0};
stralloc sa2 = {0};
unsigned int len;
char *buf;
DESCRIPTION
A stralloc variable holds a string in dynamically allocated space. String length is limited only by memory. String contents are unre-
stricted.
The stralloc structure has three components: sa.s is a pointer to the string, or 0 if it is not allocated; sa.len is the number of bytes in
the string, if it is allocated; sa.a is the number of bytes allocated for the string, if it is allocated. A stralloc variable should be
initialized to {0}, meaning unallocated.
stralloc_ready makes sure that sa has enough space allocated for len characters. It allocates extra space if necessary.
stralloc_readyplus makes sure that sa has enough space allocated for len characters more than its current length. If sa is unallocated,
stralloc_readyplus is the same as stralloc_ready.
stralloc_copy copies sa2 to sa, allocating space if necessary. Here sa2 is an allocated stralloc variable.
stralloc_copys copies a 0-terminated string, buf, to sa, without the 0.
stralloc_copyb copies len characters from buf to sa.
stralloc_cat appends sa2 to sa, allocating space if necessary. If sa is unallocated, stralloc_cat is the same as stralloc_copy.
stralloc_cats and stralloc_catb are analogous to stralloc_copys and stralloc_copyb.
stralloc_append adds a single character, *buf, to sa, allocating space if necessary.
stralloc_0 adds a single 0 character to sa.
stralloc_starts returns 1 if the 0-terminated string buf, without the 0, is a prefix of sa.
ERROR HANDLING
If a stralloc routine runs out of memory, it leaves sa alone and returns 0, setting errno appropriately. On success it returns 1; this
guarantees that sa is allocated.
SEE ALSO alloc(3), error(3)stralloc(3)
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