diff options
| author | Piotr Pawel Stefaniak <pstef@FreeBSD.org> | 2021-08-20 21:35:24 +0000 |
|---|---|---|
| committer | Piotr Pawel Stefaniak <pstef@FreeBSD.org> | 2021-08-23 05:04:28 +0000 |
| commit | 7f7b03f3897f0196e3cc7a3b71c7359cc206ba61 (patch) | |
| tree | 2fbfefe9177c50558935db1900645426aef967b1 /usr.bin/diff3 | |
| parent | f8e50dd2c67baea2bbd75f94218911d5a4d39597 (diff) | |
Diffstat (limited to 'usr.bin/diff3')
| -rw-r--r-- | usr.bin/diff3/diff3.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/usr.bin/diff3/diff3.c b/usr.bin/diff3/diff3.c index 03cd24283a13..80d4a202728f 100644 --- a/usr.bin/diff3/diff3.c +++ b/usr.bin/diff3/diff3.c @@ -459,6 +459,8 @@ duplicate(struct range *r1, struct range *r2) do { c = getc(fp[0]); d = getc(fp[1]); + if (c == -1 && d == -1) + break; if (c == -1 || d== -1) errx(EXIT_FAILURE, "logic error"); nchar++; @@ -528,10 +530,17 @@ edscript(int n) } fseek(fp[2], (long)de[n].new.from, SEEK_SET); for (k = de[n].new.to - de[n].new.from; k > 0; k-= j) { + size_t r; j = k > BUFSIZ ? BUFSIZ : k; - if (fread(block, 1, j, fp[2]) != j) + r = fread(block, 1, j, fp[2]); + if (r == 0) { + if (feof(fp[2])) + break; errx(2, "logic error"); - fwrite(block, 1, j, stdout); + } + if (r != j) + j = r; + (void)fwrite(block, 1, j, stdout); } if (!oflag || !overlap[n]) printf(".\n"); @@ -557,22 +566,22 @@ increase(void) newsz = szchanges == 0 ? 64 : 2 * szchanges; incr = newsz - szchanges; - p = realloc(d13, newsz * sizeof(struct diff)); + p = reallocarray(d13, newsz, sizeof(struct diff)); if (p == NULL) err(1, NULL); memset(p + szchanges, 0, incr * sizeof(struct diff)); d13 = p; - p = realloc(d23, newsz * sizeof(struct diff)); + p = reallocarray(d23, newsz, sizeof(struct diff)); if (p == NULL) err(1, NULL); memset(p + szchanges, 0, incr * sizeof(struct diff)); d23 = p; - p = realloc(de, newsz * sizeof(struct diff)); + p = reallocarray(de, newsz, sizeof(struct diff)); if (p == NULL) err(1, NULL); memset(p + szchanges, 0, incr * sizeof(struct diff)); de = p; - q = realloc(overlap, newsz * sizeof(char)); + q = reallocarray(overlap, newsz, sizeof(char)); if (q == NULL) err(1, NULL); memset(q + szchanges, 0, incr * sizeof(char)); |