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85 lines
2.0 KiB
85 lines
2.0 KiB
#include <stdint.h>
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#include <string.h>
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#include <stdbool.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <assert.h>
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#include "common_utils/utils.h"
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char *append(char *buf, const char *appended, size_t *pcap)
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{
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char c;
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char *buf0 = buf;
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size_t cap = *pcap;
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if (buf0 == NULL) return NULL;
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if (appended == NULL || appended[0] == 0) return buf0;
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if (*pcap < strlen(appended)+1) {
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return NULL;
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}
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while (cap > 1 && 0 != (c = *appended++)) {
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*buf++ = c;
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cap--;
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}
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assert(cap > 0);
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*pcap = cap;
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*buf = 0;
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return buf;
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}
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bool append_realloc(char **head, size_t *cap, const char *appended) {
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if (!head) return NULL;
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if (!*head) return NULL;
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if (!cap) return NULL;
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if (!appended) return NULL;
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size_t cursize = strlen(*head);
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size_t needed = strlen(appended) + 1;
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size_t remains = *cap - cursize;
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if (remains < needed) {
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size_t need_extra = needed - remains;
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size_t newsize = *cap + need_extra;
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char *new = realloc(*head, newsize);
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if (!new) return false;
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*head = new;
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*cap = newsize;
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}
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strcpy(*head + cursize, appended);
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return true;
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}
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bool fd_is_valid(int fd)
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{
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return fcntl(fd, F_GETFD) != -1 || errno != EBADF;
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}
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bool parse_boolean_arg(const char *str)
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{
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if (0 == strcasecmp(str, "on")) return true;
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if (0 == strcmp(str, "1")) return true;
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if (0 == strcasecmp(str, "yes")) return true;
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if (0 == strcasecmp(str, "enable")) return true;
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if (0 == strcasecmp(str, "en")) return true;
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if (0 == strcasecmp(str, "y")) return true;
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if (0 == strcasecmp(str, "a")) return true;
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return false;
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}
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bool parse_boolean_arg_false(const char *str)
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{
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if (0 == strcasecmp(str, "off")) return true;
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if (0 == strcmp(str, "0")) return true;
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if (0 == strcasecmp(str, "no")) return true;
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if (0 == strcasecmp(str, "disable")) return true;
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if (0 == strcasecmp(str, "dis")) return true;
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if (0 == strcasecmp(str, "n")) return true;
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return false;
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}
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