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Added file2stralloc to read a file directly into a stralloc.

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Signed-off-by: Dan Cross <patchdev@fat-dragon.org>
This commit is contained in:
Dan Cross 2018-10-12 20:30:23 +00:00 committed by Andrew Pamment
parent 7986d00b71
commit aba49d7a20
2 changed files with 28 additions and 0 deletions
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1
src/bbs.h
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@ -406,6 +406,7 @@ extern char **split_on_space(char *str, size_t *lenp);
extern void die(const char *msg); extern void die(const char *msg);
extern void *malloz(size_t size); extern void *malloz(size_t size);
extern char *file2str(const char *path); extern char *file2str(const char *path);
extern stralloc file2stralloc(const char *path);
extern char *str5dup(const char *a, const char *b, const char *c, const char *d, const char *e); extern char *str5dup(const char *a, const char *b, const char *c, const char *d, const char *e);
extern char *str4dup(const char *a, const char *b, const char *c, const char *d); extern char *str4dup(const char *a, const char *b, const char *c, const char *d);
extern char *str3dup(const char *a, const char *b, const char *c); extern char *str3dup(const char *a, const char *b, const char *c);

27
src/util.c
View File

@ -1,4 +1,5 @@
#include <sys/types.h> #include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <assert.h> #include <assert.h>
@ -45,6 +46,32 @@ char *file2str(const char *path) {
return contents; return contents;
} }
stralloc file2stralloc(const char *path) {
struct stat s;
int fd;
memset(&s, 0, sizeof(s));
if (stat(path, &s) < 0)
return EMPTY_STRALLOC;
if (!S_ISREG(s.st_mode))
return EMPTY_STRALLOC;
fd = open(path, O_RDONLY);
if (fd < 0)
return EMPTY_STRALLOC;
size_t len = s.st_size;
char *p = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
if (p == NULL) {
close(fd);
return EMPTY_STRALLOC;
}
stralloc sa = EMPTY_STRALLOC;
stralloc_copyb(&sa, p, len);
munmap(fd, len);
close(fd);
return sa;
}
char *str5dup(const char *a, const char *b, const char *c, const char *d, const char *e) { char *str5dup(const char *a, const char *b, const char *c, const char *d, const char *e) {
char *p; char *p;
size_t alen, blen, clen, dlen, elen; size_t alen, blen, clen, dlen, elen;