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vim-patch:8.0.1620: reading spell file has no good EOF detection

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Problem:    Reading spell file has no good EOF detection.
Solution:   Check for EOF at every character read for a length field.
e26e0d2b83
This commit is contained in:
Jan Edmund Lazo 2018-09-19 21:21:45 -04:00
parent e5046822c9
commit 42419e5a73
1 changed files with 53 additions and 18 deletions
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71
src/nvim/fileio.c
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@ -4531,48 +4531,83 @@ bool vim_fgets(char_u *buf, int size, FILE *fp) FUNC_ATTR_NONNULL_ALL
}
/// Read 2 bytes from "fd" and turn them into an int, MSB first.
/// Returns -1 when encountering EOF.
int get2c(FILE *fd)
{
int n;
n = getc(fd);
n = (n << 8) + getc(fd);
return n;
const int n = getc(fd);
if (n == EOF) {
return -1;
}
const int c = getc(fd);
if (c == EOF) {
return -1;
}
return (n << 8) + c;
}
/// Read 3 bytes from "fd" and turn them into an int, MSB first.
/// Returns -1 when encountering EOF.
int get3c(FILE *fd)
{
int n;
n = getc(fd);
n = (n << 8) + getc(fd);
n = (n << 8) + getc(fd);
return n;
int n = getc(fd);
if (n == EOF) {
return -1;
}
int c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + c;
c = getc(fd);
if (c == EOF) {
return -1;
}
return (n << 8) + c;
}
/// Read 4 bytes from "fd" and turn them into an int, MSB first.
/// Returns -1 when encountering EOF.
int get4c(FILE *fd)
{
// Use unsigned rather than int otherwise result is undefined
// when left-shift sets the MSB.
unsigned n;
n = (unsigned)getc(fd);
n = (n << 8) + (unsigned)getc(fd);
n = (n << 8) + (unsigned)getc(fd);
n = (n << 8) + (unsigned)getc(fd);
int c = getc(fd);
if (c == EOF) {
return -1;
}
n = (unsigned)c;
c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + (unsigned)c;
c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + (unsigned)c;
c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + (unsigned)c;
return (int)n;
}
/// Read 8 bytes from `fd` and turn them into a time_t, MSB first.
/// Returns -1 when encountering EOF.
time_t get8ctime(FILE *fd)
{
time_t n = 0;
int i;
for (i = 0; i < 8; i++) {
n = (n << 8) + getc(fd);
for (int i = 0; i < 8; i++) {
const int c = getc(fd);
if (c == EOF) {
return -1;
}
n = (n << 8) + c;
}
return n;
}