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improved error handling

This commit is contained in:
Fufu Fang 2018-07-23 22:37:37 +01:00
parent 1cd04a2a53
commit a05ba07c85
1 changed files with 19 additions and 5 deletions
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24
network.c
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@ -135,6 +135,10 @@ static char *url_append(const char *url, const char *sublink)
size_t ul = strlen(url);
size_t sl = strlen(sublink);
str = calloc(ul + sl + needs_separator + 1, sizeof(char));
if (!str) {
fprintf(stderr, "url_append(): calloc failure!\n");
exit(EXIT_FAILURE);
}
strncpy(str, url, ul);
if (needs_separator) {
str[ul] = '/';
@ -171,8 +175,8 @@ WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
mem->memory = realloc(mem->memory, mem->size + realsize + 1);
if(mem->memory == NULL) {
/* out of memory! */
fprintf(stderr, "WriteMemoryCallback(): cannot realloc!\n");
fflush(stderr);
fprintf(stderr, "WriteMemoryCallback(): realloc failure!\n");
exit(EXIT_FAILURE);
return 0;
}
@ -186,6 +190,10 @@ WriteMemoryCallback(void *contents, size_t size, size_t nmemb, void *userp)
static Link *Link_new(const char *p_url, LinkType type)
{
Link *link = calloc(1, sizeof(Link));
if (!link) {
fprintf(stderr, "Link_new(): calloc failure!\n");
exit(EXIT_FAILURE);
}
strncpy(link->p_url, p_url, LINK_LEN_MAX);
link->type = type;
@ -247,6 +255,10 @@ long Link_download(const char *path, char *output_buf, size_t size,
LinkTable *LinkTable_new(const char *url)
{
LinkTable *linktbl = calloc(1, sizeof(LinkTable));
if (!linktbl) {
fprintf(stderr, "LinkTable_new(): calloc failure!\n");
exit(EXIT_FAILURE);
}
/* populate the base URL */
LinkTable_add(linktbl, Link_new("/", LINK_HEAD));
@ -302,9 +314,11 @@ static void LinkTable_free(LinkTable *linktbl)
static void LinkTable_add(LinkTable *linktbl, Link *link)
{
linktbl->num++;
linktbl->links = realloc(
linktbl->links,
linktbl->num * sizeof(Link *));
linktbl->links = realloc(linktbl->links, linktbl->num * sizeof(Link *));
if (linktbl->links) {
fprintf(stderr, "LinkTable_add(): realloc failure!\n");
exit(EXIT_FAILURE);
}
linktbl->links[linktbl->num - 1] = link;
}