#include "debug.h" #include "util.h" #include int prefixcmp(const char *str, const char *prefix) { for (; ; str++, prefix++) if (!*prefix) return 0; else if (*str != *prefix) return (unsigned char)*prefix - (unsigned char)*str; } /* * Used as the default ->buf value, so that people can always assume * buf is non NULL and ->buf is NUL terminated even for a freshly * initialized strbuf. */ char strbuf_slopbuf[1]; int strbuf_init(struct strbuf *sb, ssize_t hint) { sb->alloc = sb->len = 0; sb->buf = strbuf_slopbuf; if (hint) return strbuf_grow(sb, hint); return 0; } void strbuf_release(struct strbuf *sb) { if (sb->alloc) { zfree(&sb->buf); strbuf_init(sb, 0); } } char *strbuf_detach(struct strbuf *sb, size_t *sz) { char *res = sb->alloc ? sb->buf : NULL; if (sz) *sz = sb->len; strbuf_init(sb, 0); return res; } int strbuf_grow(struct strbuf *sb, size_t extra) { char *buf; size_t nr = sb->len + extra + 1; if (nr < sb->alloc) return 0; if (nr <= sb->len) return -E2BIG; if (alloc_nr(sb->alloc) > nr) nr = alloc_nr(sb->alloc); /* * Note that sb->buf == strbuf_slopbuf if sb->alloc == 0, and it is * a static variable. Thus we have to avoid passing it to realloc. */ buf = realloc(sb->alloc ? sb->buf : NULL, nr * sizeof(*buf)); if (!buf) return -ENOMEM; sb->buf = buf; sb->alloc = nr; return 0; } int strbuf_addch(struct strbuf *sb, int c) { int ret = strbuf_grow(sb, 1); if (ret) return ret; sb->buf[sb->len++] = c; sb->buf[sb->len] = '\0'; return 0; } int strbuf_add(struct strbuf *sb, const void *data, size_t len) { int ret = strbuf_grow(sb, len); if (ret) return ret; memcpy(sb->buf + sb->len, data, len); return strbuf_setlen(sb, sb->len + len); } static int strbuf_addv(struct strbuf *sb, const char *fmt, va_list ap) { int len, ret; va_list ap_saved; if (!strbuf_avail(sb)) { ret = strbuf_grow(sb, 64); if (ret) return ret; } va_copy(ap_saved, ap); len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); if (len < 0) return len; if (len > strbuf_avail(sb)) { ret = strbuf_grow(sb, len); if (ret) return ret; len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap_saved); va_end(ap_saved); if (len > strbuf_avail(sb)) { pr_debug("this should not happen, your vsnprintf is broken"); return -EINVAL; } } return strbuf_setlen(sb, sb->len + len); } int strbuf_addf(struct strbuf *sb, const char *fmt, ...) { va_list ap; int ret; va_start(ap, fmt); ret = strbuf_addv(sb, fmt, ap); va_end(ap); return ret; } ssize_t strbuf_read(struct strbuf *sb, int fd, ssize_t hint) { size_t oldlen = sb->len; size_t oldalloc = sb->alloc; int ret; ret = strbuf_grow(sb, hint ? hint : 8192); if (ret) return ret; for (;;) { ssize_t cnt; cnt = read(fd, sb->buf + sb->len, sb->alloc - sb->len - 1); if (cnt < 0) { if (oldalloc == 0) strbuf_release(sb); else strbuf_setlen(sb, oldlen); return cnt; } if (!cnt) break; sb->len += cnt; ret = strbuf_grow(sb, 8192); if (ret) return ret; } sb->buf[sb->len] = '\0'; return sb->len - oldlen; } rs/usb?h=nds-private-remove&id=14a179f8e2735b51cb86c36dd95e8524b8419820'>usb/musb/am35x.c

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