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-rw-r--r--chunkedit.c452
1 files changed, 452 insertions, 0 deletions
diff --git a/chunkedit.c b/chunkedit.c
new file mode 100644
index 0000000..9bf5630
--- /dev/null
+++ b/chunkedit.c
@@ -0,0 +1,452 @@
+/* This file is part of "reprepro"
+ * Copyright (C) 2006 Bernhard R. Link
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1301 USA
+ */
+#include <config.h>
+
+#include <sys/types.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <assert.h>
+#include "error.h"
+#include "chunkedit.h"
+#include "names.h"
+
+void cef_free(struct chunkeditfield *f) {
+ while (f != NULL) {
+ int i;
+ struct chunkeditfield *p = f;
+ f = f->next;
+
+ for (i = 0 ; i < p->linecount ; i++) {
+ free(p->lines[i].words);
+ free(p->lines[i].wordlen);
+ }
+ free(p);
+ }
+}
+
+struct chunkeditfield *cef_newfield(const char *field, enum cefaction action, enum cefwhen when, unsigned int linecount, struct chunkeditfield *next) {
+ struct chunkeditfield *n;
+
+ n = calloc(1, sizeof(struct chunkeditfield) +
+ linecount * sizeof(struct cef_line));
+ if (FAILEDTOALLOC(n)) {
+ cef_free(next);
+ return NULL;
+ }
+ assert(field != NULL);
+ n->field = field;
+ n->len_field = strlen(field);
+ n->action = action;
+ n->when = when;
+ n->linecount = linecount;
+ n->next = next;
+ return n;
+}
+
+
+void cef_setdatalen(struct chunkeditfield *cef, const char *data, size_t len) {
+ assert (data != NULL || len == 0);
+
+ assert (cef->len_all_data >= cef->len_data);
+ cef->len_all_data -= cef->len_data;
+ cef->len_all_data += len;
+ cef->data = data;
+ cef->len_data = len;
+ cef->words = NULL;
+}
+
+void cef_setdata(struct chunkeditfield *cef, const char *data) {
+ cef_setdatalen(cef, data, strlen(data));
+}
+
+void cef_setwordlist(struct chunkeditfield *cef, const struct strlist *words) {
+ int i; size_t len = 0;
+
+ for (i = 0 ; i < words->count ; i++) {
+ len += 1+strlen(words->values[i]);
+ }
+ if (len > 0)
+ len--;
+ assert (cef->len_all_data >= cef->len_data);
+ cef->len_all_data -= cef->len_data;
+ cef->len_all_data += len;
+ cef->data = NULL;
+ cef->len_data = len;
+ cef->words = words;
+}
+
+retvalue cef_setline(struct chunkeditfield *cef, int line, int wordcount, ...) {
+ va_list ap; int i;
+ struct cef_line *l;
+ const char *word;
+ size_t len;
+
+ assert (line < cef->linecount);
+ assert (wordcount > 0);
+
+ l = &cef->lines[line];
+ assert (l->wordcount == 0 && l->words == NULL && l->wordlen == NULL);
+
+ l->wordcount = wordcount;
+ l->words = nzNEW(wordcount, const char*);
+ if (FAILEDTOALLOC(l->words))
+ return RET_ERROR_OOM;
+ l->wordlen = nzNEW(wordcount, size_t);
+ if (FAILEDTOALLOC(l->wordlen)) {
+ free(l->words);l->words = NULL;
+ return RET_ERROR_OOM;
+ }
+ va_start(ap, wordcount);
+ len = 1; /* newline */
+ for (i = 0 ; i < wordcount; i++) {
+ word = va_arg(ap, const char*);
+ assert(word != NULL);
+
+ l->words[i] = word;
+ l->wordlen[i] = strlen(word);
+ len += 1 + l->wordlen[i];
+ }
+ word = va_arg(ap, const char*);
+ assert (word == NULL);
+
+ va_end(ap);
+ cef->len_all_data += len;
+ return RET_OK;
+}
+
+retvalue cef_setline2(struct chunkeditfield *cef, int line, const char *hash, size_t hashlen, const char *size, size_t sizelen, int wordcount, ...) {
+ va_list ap; int i;
+ struct cef_line *l;
+ const char *word;
+ size_t len;
+
+ assert (line < cef->linecount);
+ assert (wordcount >= 0);
+
+ l = &cef->lines[line];
+ assert (l->wordcount == 0 && l->words == NULL && l->wordlen == NULL);
+
+ l->wordcount = wordcount + 2;
+ l->words = nzNEW(wordcount + 2, const char *);
+ if (FAILEDTOALLOC(l->words))
+ return RET_ERROR_OOM;
+ l->wordlen = nzNEW(wordcount + 2, size_t);
+ if (FAILEDTOALLOC(l->wordlen)) {
+ free(l->words); l->words = NULL;
+ return RET_ERROR_OOM;
+ }
+ va_start(ap, wordcount);
+ len = 1; /* newline */
+ l->words[0] = hash;
+ l->wordlen[0] = hashlen;
+ len += 1 + hashlen;
+ l->words[1] = size;
+ l->wordlen[1] = sizelen;
+ len += 1 + sizelen;
+ for (i = 0 ; i < wordcount; i++) {
+ word = va_arg(ap, const char*);
+ assert(word != NULL);
+
+ l->words[i + 2] = word;
+ l->wordlen[i + 2] = strlen(word);
+ len += 1 + l->wordlen[i + 2];
+ }
+ word = va_arg(ap, const char*);
+ assert (word == NULL);
+
+ va_end(ap);
+ cef->len_all_data += len;
+ return RET_OK;
+}
+
+static inline int findcef(const struct chunkeditfield *cef, const char *p, size_t len) {
+ int result = 0;
+ while (cef != NULL) {
+ if (cef->len_field == len &&
+ strncasecmp(p, cef->field, len) == 0) {
+ return result;
+ }
+ cef = cef->next;
+ result++;
+ }
+ return -1;
+}
+
+retvalue chunk_edit(const char *chunk, char **result, size_t *rlen, const struct chunkeditfield *cefs) {
+ size_t maxlen;
+ int i, processed, count = 0;
+ const struct chunkeditfield *cef;
+ struct field {
+ const struct chunkeditfield *cef;
+ size_t startofs, endofs;
+ /* next in original chunk */
+ int next;
+ } *fields;
+ const char *p, *q, *e;
+ char *n; size_t len;
+
+ maxlen = 1; /* a newline might get missed */
+ for (cef = cefs ; cef != NULL ; cef=cef->next) {
+ maxlen += cef->len_field + cef->len_all_data + 3; /* ': \n' */
+ count ++;
+ }
+ fields = nzNEW(count, struct field);
+ if (FAILEDTOALLOC(fields))
+ return RET_ERROR_OOM;
+ i = 0;
+ for (cef = cefs ; cef != NULL ; cef=cef->next) {
+ assert (i < count);
+ fields[i++].cef = cef;
+ }
+ assert (i == count);
+
+ /* get rid of empty or strange lines at the beginning: */
+ while (*chunk == ' ' || *chunk == '\t') {
+ while (*chunk != '\0' && *chunk != '\n')
+ chunk++;
+ if (*chunk == '\n')
+ chunk++;
+ }
+ p = chunk;
+
+ while (true) {
+ q = p;
+ while (*q != '\0' && *q != '\n' && *q != ':')
+ q++;
+ if (*q == '\0')
+ break;
+ if (*q == '\n') {
+ /* header without colon? what kind of junk is this? */
+ q++;
+ while (*q == ' ' || *q == '\t') {
+ while (*q != '\0' && *q != '\n')
+ q++;
+ if (*q == '\n')
+ q++;
+
+ }
+ if (p == chunk)
+ chunk = q;
+ p = q;
+ continue;
+ }
+ i = findcef(cefs, p, q-p);
+ /* find begin and end of data */
+ q++;
+ while (*q == ' ')
+ q++;
+ e = q;
+ while (*e != '\0' && *e != '\n')
+ e++;
+ while (e[0] == '\n' && (e[1] == ' ' || e[1] == '\t')) {
+ e++;
+ while (*e != '\0' && *e != '\n')
+ e++;
+ }
+ if (i < 0) {
+ /* not known, we'll have to copy it */
+ maxlen += 1+e-p;
+ if (*e == '\0')
+ break;
+ p = e+1;
+ continue;
+ }
+ if (fields[i].endofs == 0) {
+ fields[i].startofs = p-chunk;
+ fields[i].endofs = e-chunk;
+ if (fields[i].cef->action == CEF_KEEP ||
+ fields[i].cef->action == CEF_ADDMISSED)
+ maxlen += 1+e-q;
+ }
+ if (*e == '\0')
+ break;
+ p = e+1;
+ }
+ n = malloc(maxlen + 1);
+ if (FAILEDTOALLOC(n)) {
+ free(fields);
+ return RET_ERROR_OOM;
+ }
+ len = 0;
+ for (processed = 0;
+ processed < count && fields[processed].cef->when == CEF_EARLY;
+ processed++) {
+ struct field *f = &fields[processed];
+ const struct chunkeditfield *ef = f->cef;
+ if (ef->action == CEF_DELETE)
+ continue;
+ if (ef->action == CEF_REPLACE && f->endofs == 0)
+ continue;
+ if (f->endofs != 0 &&
+ (ef->action == CEF_KEEP ||
+ ef->action == CEF_ADDMISSED)) {
+ size_t l = f->endofs - f->startofs;
+ assert (maxlen >= len + l);
+ memcpy(n+len, chunk + f->startofs, l);
+ len +=l;
+ n[len++] = '\n';
+ continue;
+ }
+ if (ef->action == CEF_KEEP)
+ continue;
+ assert (maxlen >= len+ 3+ ef->len_field);
+ memcpy(n+len, ef->field, ef->len_field);
+ len += ef->len_field;
+ n[len++] = ':';
+ n[len++] = ' ';
+ if (ef->data != NULL) {
+ assert (maxlen >= len+1+ef->len_data);
+ memcpy(n+len, ef->data, ef->len_data);
+ len += ef->len_data;
+ } else if (ef->words != NULL) {
+ int j;
+ for (j = 0 ; j < ef->words->count ; j++) {
+ const char *v = ef->words->values[j];
+ size_t l = strlen(v);
+ if (j > 0)
+ n[len++] = ' ';
+ memcpy(n+len, v, l);
+ len += l;
+ }
+ }
+ for (i = 0 ; i < ef->linecount ; i++) {
+ int j;
+ n[len++] = '\n';
+ for (j = 0 ; j < ef->lines[i].wordcount ; j++) {
+ n[len++] = ' ';
+ memcpy(n+len, ef->lines[i].words[j],
+ ef->lines[i].wordlen[j]);
+ len += ef->lines[i].wordlen[j];
+ }
+ }
+ assert(maxlen > len);
+ n[len++] = '\n';
+ }
+ p = chunk;
+ /* now add all headers in between */
+ while (true) {
+ q = p;
+ while (*q != '\0' && *q != '\n' && *q != ':')
+ q++;
+ if (*q == '\0')
+ break;
+ if (*q == '\n') {
+ /* header without colon? what kind of junk is this? */
+ q++;
+ while (*q == ' ' || *q == '\t') {
+ while (*q != '\0' && *q != '\n')
+ q++;
+ if (*q == '\n')
+ q++;
+
+ }
+ p = q;
+ continue;
+ }
+ i = findcef(cefs, p, q-p);
+ /* find begin and end of data */
+ q++;
+ while (*q == ' ')
+ q++;
+ e = q;
+ while (*e != '\0' && *e != '\n')
+ e++;
+ while (e[0] == '\n' && (e[1] == ' ' || e[1] == '\t')) {
+ e++;
+ while (*e != '\0' && *e != '\n')
+ e++;
+ }
+ if (i < 0) {
+ /* not known, copy it */
+ size_t l = e - p;
+ assert (maxlen >= len + l);
+ memcpy(n+len, p, l);
+ len += l;
+ n[len++] = '\n';
+ if (*e == '\0')
+ break;
+ p = e+1;
+ continue;
+ }
+ if (*e == '\0')
+ break;
+ p = e+1;
+ }
+ for (; processed < count ; processed++) {
+ struct field *f = &fields[processed];
+ const struct chunkeditfield *ef = f->cef;
+ if (ef->action == CEF_DELETE)
+ continue;
+ if (ef->action == CEF_REPLACE && f->endofs == 0)
+ continue;
+ if (f->endofs != 0 &&
+ (ef->action == CEF_KEEP ||
+ ef->action == CEF_ADDMISSED)) {
+ size_t l = f->endofs - f->startofs;
+ assert (maxlen >= len + l);
+ memcpy(n+len, chunk + f->startofs, l);
+ len +=l;
+ n[len++] = '\n';
+ continue;
+ }
+ if (ef->action == CEF_KEEP)
+ continue;
+ assert (maxlen >= len+ 3+ ef->len_field);
+ memcpy(n+len, ef->field, ef->len_field);
+ len += ef->len_field;
+ n[len++] = ':';
+ n[len++] = ' ';
+ if (ef->data != NULL) {
+ assert (maxlen >= len+1+ef->len_data);
+ memcpy(n+len, ef->data, ef->len_data);
+ len += ef->len_data;
+ } else if (ef->words != NULL) {
+ int j;
+ for (j = 0 ; j < ef->words->count ; j++) {
+ const char *v = ef->words->values[j];
+ size_t l = strlen(v);
+ if (j > 0)
+ n[len++] = ' ';
+ memcpy(n+len, v, l);
+ len += l;
+ }
+ }
+ for (i = 0 ; i < ef->linecount ; i++) {
+ int j;
+ n[len++] = '\n';
+ for (j = 0 ; j < ef->lines[i].wordcount ; j++) {
+ n[len++] = ' ';
+ memcpy(n+len, ef->lines[i].words[j],
+ ef->lines[i].wordlen[j]);
+ len += ef->lines[i].wordlen[j];
+ }
+ }
+ assert(maxlen > len);
+ n[len++] = '\n';
+ }
+ assert(maxlen >= len);
+ n[len] = '\0';
+ free(fields);
+ *result = realloc(n, len+1);
+ if (*result == NULL)
+ *result = n;
+ *rlen = len;
+ return RET_OK;
+}
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