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fixed minor static analyzer warning in fileCompress example

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This commit is contained in:
Yann Collet
2025-01-12 23:30:55 -08:00
parent 205fd851dd
commit 923839bbc9
1 changed files with 15 additions and 7 deletions
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22
examples/fileCompress.c
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@@ -28,7 +28,7 @@ static size_t get_file_size(char *filename)
return 0;
}
return statbuf.st_size;
return (size_t)statbuf.st_size;
}
static int compress_file(FILE* f_in, FILE* f_out)
@@ -36,7 +36,6 @@ static int compress_file(FILE* f_in, FILE* f_out)
assert(f_in != NULL); assert(f_out != NULL);
LZ4F_errorCode_t ret = LZ4F_OK_NoError;
size_t len;
LZ4_writeFile_t* lz4fWrite;
void* const buf = malloc(CHUNK_SIZE);
if (!buf) {
@@ -56,7 +55,7 @@ static int compress_file(FILE* f_in, FILE* f_out)
}
while (1) {
len = fread(buf, 1, CHUNK_SIZE, f_in);
size_t len = fread(buf, 1, CHUNK_SIZE, f_in);
if (ferror(f_in)) {
printf("fread error\n");
@@ -94,6 +93,7 @@ static int decompress_file(FILE* f_in, FILE* f_out)
void* const buf= malloc(CHUNK_SIZE);
if (!buf) {
printf("error: memory allocation failed \n");
return 1;
}
ret = LZ4F_readOpen(&lz4fRead, f_in);
@@ -135,9 +135,11 @@ out:
return 0;
}
/* @return 0 if both FILE* have identical content */
int compareFiles(FILE* fp0, FILE* fp1)
{
int result = 0;
assert(fp0 != NULL); assert(fp1 != NULL);
while (result==0) {
char b0[1024];
@@ -147,7 +149,7 @@ int compareFiles(FILE* fp0, FILE* fp1)
result = (r0 != r1);
if (!r0 || !r1) break;
if (!result) result = memcmp(b0, b1, r0);
if (r0 == r1) result = memcmp(b0, b1, r0);
}
return result;
@@ -175,7 +177,7 @@ int main(int argc, const char **argv) {
{ FILE* const inpFp = fopen(inpFilename, "rb");
FILE* const outFp = fopen(lz4Filename, "wb");
printf("compress : %s -> %s\n", inpFilename, lz4Filename);
LZ4F_errorCode_t ret = compress_file(inpFp, outFp);
int ret = compress_file(inpFp, outFp);
fclose(inpFp);
fclose(outFp);
@@ -188,7 +190,7 @@ int main(int argc, const char **argv) {
inpFilename,
get_file_size(inpFilename),
get_file_size(lz4Filename), /* might overflow is size_t is 32 bits and size_{in,out} > 4 GB */
(double)get_file_size(lz4Filename) / get_file_size(inpFilename) * 100);
(double)get_file_size(lz4Filename) / (double)get_file_size(inpFilename) * 100);
printf("compress : done\n");
}
@@ -198,8 +200,11 @@ int main(int argc, const char **argv) {
FILE* const inpFp = fopen(lz4Filename, "rb");
FILE* const outFp = fopen(decFilename, "wb");
if (inpFp == NULL) exit(1);
if (outFp == NULL) exit(1);
printf("decompress : %s -> %s\n", lz4Filename, decFilename);
LZ4F_errorCode_t ret = decompress_file(inpFp, outFp);
int ret = decompress_file(inpFp, outFp);
fclose(outFp);
fclose(inpFp);
@@ -216,6 +221,9 @@ int main(int argc, const char **argv) {
{ FILE* const inpFp = fopen(inpFilename, "rb");
FILE* const decFp = fopen(decFilename, "rb");
if (inpFp == NULL) exit(1);
if (decFp == NULL) exit(1);
printf("verify : %s <-> %s\n", inpFilename, decFilename);
int const cmp = compareFiles(inpFp, decFp);