ref: 768963687f66b324a6442ec46e1d9939944ed37a
dir: /util.c/
#include <u.h> #include <libc.h> #include <ctype.h> #include "git.h" Reprog *authorpat; Hash Zhash; int chattygit; Object* emptydir(void) { static Object *e; if(e != nil) return ref(e); e = emalloc(sizeof(Object)); e->hash = Zhash; e->type = GTree; e->tree = emalloc(sizeof(Tinfo)); e->tree->ent = nil; e->tree->nent = 0; e->flag |= Cloaded|Cparsed; e->off = -1; ref(e); cache(e); return e; } int hasheq(Hash *a, Hash *b) { return memcmp(a->h, b->h, sizeof(a->h)) == 0; } static int charval(int c, int *err) { if(c >= '0' && c <= '9') return c - '0'; if(c >= 'a' && c <= 'f') return c - 'a' + 10; if(c >= 'A' && c <= 'F') return c - 'A' + 10; *err = 1; return -1; } void * emalloc(ulong n) { void *v; v = mallocz(n, 1); if(v == nil) sysfatal("malloc: %r"); setmalloctag(v, getcallerpc(&n)); return v; } void * erealloc(void *p, ulong n) { void *v; v = realloc(p, n); if(v == nil) sysfatal("realloc: %r"); setmalloctag(v, getcallerpc(&p)); return v; } char* estrdup(char *s) { s = strdup(s); if(s == nil) sysfatal("strdup: %r"); setmalloctag(s, getcallerpc(&s)); return s; } int Hfmt(Fmt *fmt) { Hash h; int i, n, l; char c0, c1; l = 0; h = va_arg(fmt->args, Hash); for(i = 0; i < sizeof h.h; i++){ n = (h.h[i] >> 4) & 0xf; c0 = (n >= 10) ? n-10 + 'a' : n + '0'; n = h.h[i] & 0xf; c1 = (n >= 10) ? n-10 + 'a' : n + '0'; l += fmtprint(fmt, "%c%c", c0, c1); } return l; } int Tfmt(Fmt *fmt) { int t; int l; t = va_arg(fmt->args, int); switch(t){ case GNone: l = fmtprint(fmt, "none"); break; case GCommit: l = fmtprint(fmt, "commit"); break; case GTree: l = fmtprint(fmt, "tree"); break; case GBlob: l = fmtprint(fmt, "blob"); break; case GTag: l = fmtprint(fmt, "tag"); break; case GOdelta: l = fmtprint(fmt, "odelta"); break; case GRdelta: l = fmtprint(fmt, "gdelta"); break; default: l = fmtprint(fmt, "?%d?", t); break; } return l; } int Ofmt(Fmt *fmt) { Object *o; int l; o = va_arg(fmt->args, Object *); print("== %H (%T) ==\n", o->hash, o->type); switch(o->type){ case GTree: l = fmtprint(fmt, "tree\n"); break; case GBlob: l = fmtprint(fmt, "blob %s\n", o->data); break; case GCommit: l = fmtprint(fmt, "commit\n"); break; case GTag: l = fmtprint(fmt, "tag\n"); break; default: l = fmtprint(fmt, "invalid: %d\n", o->type); break; } return l; } int Qfmt(Fmt *fmt) { Qid q; q = va_arg(fmt->args, Qid); return fmtprint(fmt, "Qid{path=0x%llx(dir:%d,obj:%lld), vers=%ld, type=%d}", q.path, QDIR(&q), (q.path >> 8), q.vers, q.type); } void gitinit(void) { fmtinstall('H', Hfmt); fmtinstall('T', Tfmt); fmtinstall('O', Ofmt); fmtinstall('Q', Qfmt); inflateinit(); deflateinit(); authorpat = regcomp("[\t ]*(.*)[\t ]+([0-9]+)[\t ]+([\\-+]?[0-9]+)"); osinit(&objcache); } int hparse(Hash *h, char *b) { int i, err; err = 0; for(i = 0; i < sizeof(h->h); i++){ err = 0; h->h[i] = 0; h->h[i] |= ((charval(b[2*i], &err) & 0xf) << 4); h->h[i] |= ((charval(b[2*i+1], &err)& 0xf) << 0); if(err){ werrstr("invalid hash"); return -1; } } return 0; } int slurpdir(char *p, Dir **d) { int r, f; if((f = open(p, OREAD)) == -1) return -1; r = dirreadall(f, d); close(f); return r; } int hassuffix(char *base, char *suf) { int nb, ns; nb = strlen(base); ns = strlen(suf); if(ns <= nb && strcmp(base + (nb - ns), suf) == 0) return 1; return 0; } int swapsuffix(char *dst, int dstsz, char *base, char *oldsuf, char *suf) { int bl, ol, sl, l; bl = strlen(base); ol = strlen(oldsuf); sl = strlen(suf); l = bl + sl - ol; if(l + 1 > dstsz || ol > bl) return -1; memmove(dst, base, bl - ol); memmove(dst + bl - ol, suf, sl); dst[l] = 0; return l; } char * strip(char *s) { char *e; while(isspace(*s)) s++; e = s + strlen(s); while(e > s && isspace(*--e)) *e = 0; return s; } void dprint(int v, char *fmt, ...) { va_list ap; if(chattygit < v) return; va_start(ap, fmt); vfprint(2, fmt, ap); va_end(ap); } /* Finds the directory containing the git repo. */ int findrepo(char *buf, int nbuf) { char *p, *suff; suff = "/.git/HEAD"; if(getwd(buf, nbuf - strlen(suff) - 1) == nil) return -1; for(p = buf + strlen(buf); p != nil; p = strrchr(buf, '/')){ strcpy(p, suff); if(access(buf, AEXIST) == 0){ *p = 0; return 0; } *p = '\0'; } werrstr("not a git repository"); return -1; }