/* * IPP test program for CUPS. * * Copyright 2007-2017 by Apple Inc. * Copyright 1997-2005 by Easy Software Products. * * These coded instructions, statements, and computer programs are the * property of Apple Inc. and are protected by Federal copyright * law. Distribution and use rights are outlined in the file "LICENSE.txt" * which should have been included with this file. If this file is * missing or damaged, see the license at "http://www.cups.org/". * * This file is subject to the Apple OS-Developed Software exception. */ /* * Include necessary headers... */ #include "file.h" #include "string-private.h" #include "ipp-private.h" #ifdef WIN32 # include #else # include # include #endif /* WIN32 */ /* * Local types... */ typedef struct _ippdata_t { size_t rpos, /* Read position */ wused, /* Bytes used */ wsize; /* Max size of buffer */ ipp_uchar_t *wbuffer; /* Buffer */ } _ippdata_t; /* * Local globals... */ static ipp_uchar_t collection[] = /* Collection buffer */ { 0x01, 0x01, /* IPP version */ 0x00, 0x02, /* Print-Job operation */ 0x00, 0x00, 0x00, 0x01, /* Request ID */ IPP_TAG_OPERATION, IPP_TAG_CHARSET, 0x00, 0x12, /* Name length + name */ 'a','t','t','r','i','b','u','t','e','s','-', 'c','h','a','r','s','e','t', 0x00, 0x05, /* Value length + value */ 'u','t','f','-','8', IPP_TAG_LANGUAGE, 0x00, 0x1b, /* Name length + name */ 'a','t','t','r','i','b','u','t','e','s','-', 'n','a','t','u','r','a','l','-','l','a','n', 'g','u','a','g','e', 0x00, 0x02, /* Value length + value */ 'e','n', IPP_TAG_URI, 0x00, 0x0b, /* Name length + name */ 'p','r','i','n','t','e','r','-','u','r','i', 0x00, 0x1c, /* Value length + value */ 'i','p','p',':','/','/','l','o','c','a','l', 'h','o','s','t','/','p','r','i','n','t','e', 'r','s','/','f','o','o', IPP_TAG_JOB, /* job group tag */ IPP_TAG_BEGIN_COLLECTION, /* begCollection tag */ 0x00, 0x09, /* Name length + name */ 'm', 'e', 'd', 'i', 'a', '-', 'c', 'o', 'l', 0x00, 0x00, /* No value */ IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0a, /* Value length + value */ 'm', 'e', 'd', 'i', 'a', '-', 's', 'i', 'z', 'e', IPP_TAG_BEGIN_COLLECTION, /* begCollection tag */ 0x00, 0x00, /* Name length + name */ 0x00, 0x00, /* No value */ IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0b, /* Value length + value */ 'x', '-', 'd', 'i', 'm', 'e', 'n', 's', 'i', 'o', 'n', IPP_TAG_INTEGER, /* integer tag */ 0x00, 0x00, /* No name */ 0x00, 0x04, /* Value length + value */ 0x00, 0x00, 0x54, 0x56, IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0b, /* Value length + value */ 'y', '-', 'd', 'i', 'm', 'e', 'n', 's', 'i', 'o', 'n', IPP_TAG_INTEGER, /* integer tag */ 0x00, 0x00, /* No name */ 0x00, 0x04, /* Value length + value */ 0x00, 0x00, 0x6d, 0x24, IPP_TAG_END_COLLECTION, /* endCollection tag */ 0x00, 0x00, /* No name */ 0x00, 0x00, /* No value */ IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0b, /* Value length + value */ 'm', 'e', 'd', 'i', 'a', '-', 'c', 'o', 'l', 'o', 'r', IPP_TAG_KEYWORD, /* keyword tag */ 0x00, 0x00, /* No name */ 0x00, 0x04, /* Value length + value */ 'b', 'l', 'u', 'e', IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0a, /* Value length + value */ 'm', 'e', 'd', 'i', 'a', '-', 't', 'y', 'p', 'e', IPP_TAG_KEYWORD, /* keyword tag */ 0x00, 0x00, /* No name */ 0x00, 0x05, /* Value length + value */ 'p', 'l', 'a', 'i', 'n', IPP_TAG_END_COLLECTION, /* endCollection tag */ 0x00, 0x00, /* No name */ 0x00, 0x00, /* No value */ IPP_TAG_BEGIN_COLLECTION, /* begCollection tag */ 0x00, 0x00, /* No name */ 0x00, 0x00, /* No value */ IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0a, /* Value length + value */ 'm', 'e', 'd', 'i', 'a', '-', 's', 'i', 'z', 'e', IPP_TAG_BEGIN_COLLECTION, /* begCollection tag */ 0x00, 0x00, /* Name length + name */ 0x00, 0x00, /* No value */ IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0b, /* Value length + value */ 'x', '-', 'd', 'i', 'm', 'e', 'n', 's', 'i', 'o', 'n', IPP_TAG_INTEGER, /* integer tag */ 0x00, 0x00, /* No name */ 0x00, 0x04, /* Value length + value */ 0x00, 0x00, 0x52, 0x08, IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0b, /* Value length + value */ 'y', '-', 'd', 'i', 'm', 'e', 'n', 's', 'i', 'o', 'n', IPP_TAG_INTEGER, /* integer tag */ 0x00, 0x00, /* No name */ 0x00, 0x04, /* Value length + value */ 0x00, 0x00, 0x74, 0x04, IPP_TAG_END_COLLECTION, /* endCollection tag */ 0x00, 0x00, /* No name */ 0x00, 0x00, /* No value */ IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0b, /* Value length + value */ 'm', 'e', 'd', 'i', 'a', '-', 'c', 'o', 'l', 'o', 'r', IPP_TAG_KEYWORD, /* keyword tag */ 0x00, 0x00, /* No name */ 0x00, 0x05, /* Value length + value */ 'p', 'l', 'a', 'i', 'd', IPP_TAG_MEMBERNAME, /* memberAttrName tag */ 0x00, 0x00, /* No name */ 0x00, 0x0a, /* Value length + value */ 'm', 'e', 'd', 'i', 'a', '-', 't', 'y', 'p', 'e', IPP_TAG_KEYWORD, /* keyword tag */ 0x00, 0x00, /* No name */ 0x00, 0x06, /* Value length + value */ 'g', 'l', 'o', 's', 's', 'y', IPP_TAG_END_COLLECTION, /* endCollection tag */ 0x00, 0x00, /* No name */ 0x00, 0x00, /* No value */ IPP_TAG_END /* end tag */ }; static ipp_uchar_t mixed[] = /* Mixed value buffer */ { 0x01, 0x01, /* IPP version */ 0x00, 0x02, /* Print-Job operation */ 0x00, 0x00, 0x00, 0x01, /* Request ID */ IPP_TAG_OPERATION, IPP_TAG_INTEGER, /* integer tag */ 0x00, 0x1f, /* Name length + name */ 'n', 'o', 't', 'i', 'f', 'y', '-', 'l', 'e', 'a', 's', 'e', '-', 'd', 'u', 'r', 'a', 't', 'i', 'o', 'n', '-', 's', 'u', 'p', 'p', 'o', 'r', 't', 'e', 'd', 0x00, 0x04, /* Value length + value */ 0x00, 0x00, 0x00, 0x01, IPP_TAG_RANGE, /* rangeOfInteger tag */ 0x00, 0x00, /* No name */ 0x00, 0x08, /* Value length + value */ 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x20, IPP_TAG_END /* end tag */ }; /* * Local functions... */ void hex_dump(const char *title, ipp_uchar_t *buffer, size_t bytes); void print_attributes(ipp_t *ipp, int indent); ssize_t read_cb(_ippdata_t *data, ipp_uchar_t *buffer, size_t bytes); ssize_t write_cb(_ippdata_t *data, ipp_uchar_t *buffer, size_t bytes); /* * 'main()' - Main entry. */ int /* O - Exit status */ main(int argc, /* I - Number of command-line arguments */ char *argv[]) /* I - Command-line arguments */ { _ippdata_t data; /* IPP buffer */ ipp_uchar_t buffer[8192]; /* Write buffer data */ ipp_t *cols[2], /* Collections */ *size; /* media-size collection */ ipp_t *request; /* Request */ ipp_attribute_t *media_col, /* media-col attribute */ *media_size, /* media-size attribute */ *attr; /* Other attribute */ ipp_state_t state; /* State */ size_t length; /* Length of data */ cups_file_t *fp; /* File pointer */ size_t i; /* Looping var */ int status; /* Status of tests (0 = success, 1 = fail) */ #ifdef DEBUG const char *name; /* Option name */ #endif /* DEBUG */ status = 0; if (argc == 1) { /* * Test request generation code... */ printf("Create Sample Request: "); request = ippNew(); request->request.op.version[0] = 0x01; request->request.op.version[1] = 0x01; request->request.op.operation_id = IPP_OP_PRINT_JOB; request->request.op.request_id = 1; ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_CHARSET, "attributes-charset", NULL, "utf-8"); ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_LANGUAGE, "attributes-natural-language", NULL, "en"); ippAddString(request, IPP_TAG_OPERATION, IPP_TAG_URI, "printer-uri", NULL, "ipp://localhost/printers/foo"); cols[0] = ippNew(); size = ippNew(); ippAddInteger(size, IPP_TAG_ZERO, IPP_TAG_INTEGER, "x-dimension", 21590); ippAddInteger(size, IPP_TAG_ZERO, IPP_TAG_INTEGER, "y-dimension", 27940); ippAddCollection(cols[0], IPP_TAG_JOB, "media-size", size); ippDelete(size); ippAddString(cols[0], IPP_TAG_JOB, IPP_TAG_KEYWORD, "media-color", NULL, "blue"); ippAddString(cols[0], IPP_TAG_JOB, IPP_TAG_KEYWORD, "media-type", NULL, "plain"); cols[1] = ippNew(); size = ippNew(); ippAddInteger(size, IPP_TAG_ZERO, IPP_TAG_INTEGER, "x-dimension", 21000); ippAddInteger(size, IPP_TAG_ZERO, IPP_TAG_INTEGER, "y-dimension", 29700); ippAddCollection(cols[1], IPP_TAG_JOB, "media-size", size); ippDelete(size); ippAddString(cols[1], IPP_TAG_JOB, IPP_TAG_KEYWORD, "media-color", NULL, "plaid"); ippAddString(cols[1], IPP_TAG_JOB, IPP_TAG_KEYWORD, "media-type", NULL, "glossy"); ippAddCollections(request, IPP_TAG_JOB, "media-col", 2, (const ipp_t **)cols); ippDelete(cols[0]); ippDelete(cols[1]); length = ippLength(request); if (length != sizeof(collection)) { printf("FAIL - wrong ippLength(), %d instead of %d bytes!\n", (int)length, (int)sizeof(collection)); status = 1; } else puts("PASS"); /* * Write test #1... */ printf("Write Sample to Memory: "); data.wused = 0; data.wsize = sizeof(buffer); data.wbuffer = buffer; while ((state = ippWriteIO(&data, (ipp_iocb_t)write_cb, 1, NULL, request)) != IPP_STATE_DATA) if (state == IPP_STATE_ERROR) break; if (state != IPP_STATE_DATA) { printf("FAIL - %d bytes written.\n", (int)data.wused); status = 1; } else if (data.wused != sizeof(collection)) { printf("FAIL - wrote %d bytes, expected %d bytes!\n", (int)data.wused, (int)sizeof(collection)); hex_dump("Bytes Written", data.wbuffer, data.wused); hex_dump("Baseline", collection, sizeof(collection)); status = 1; } else if (memcmp(data.wbuffer, collection, data.wused)) { for (i = 0; i < data.wused; i ++) if (data.wbuffer[i] != collection[i]) break; printf("FAIL - output does not match baseline at 0x%04x!\n", (unsigned)i); hex_dump("Bytes Written", data.wbuffer, data.wused); hex_dump("Baseline", collection, sizeof(collection)); status = 1; } else puts("PASS"); ippDelete(request); /* * Read the data back in and confirm... */ printf("Read Sample from Memory: "); request = ippNew(); data.rpos = 0; while ((state = ippReadIO(&data, (ipp_iocb_t)read_cb, 1, NULL, request)) != IPP_STATE_DATA) if (state == IPP_STATE_ERROR) break; length = ippLength(request); if (state != IPP_STATE_DATA) { printf("FAIL - %d bytes read.\n", (int)data.rpos); status = 1; } else if (data.rpos != data.wused) { printf("FAIL - read %d bytes, expected %d bytes!\n", (int)data.rpos, (int)data.wused); print_attributes(request, 8); status = 1; } else if (length != sizeof(collection)) { printf("FAIL - wrong ippLength(), %d instead of %d bytes!\n", (int)length, (int)sizeof(collection)); print_attributes(request, 8); status = 1; } else puts("PASS"); fputs("ippFindAttribute(media-col): ", stdout); if ((media_col = ippFindAttribute(request, "media-col", IPP_TAG_BEGIN_COLLECTION)) == NULL) { if ((media_col = ippFindAttribute(request, "media-col", IPP_TAG_ZERO)) == NULL) puts("FAIL (not found)"); else printf("FAIL (wrong type - %s)\n", ippTagString(media_col->value_tag)); status = 1; } else if (media_col->num_values != 2) { printf("FAIL (wrong count - %d)\n", media_col->num_values); status = 1; } else puts("PASS"); if (media_col) { fputs("ippFindAttribute(media-size 1): ", stdout); if ((media_size = ippFindAttribute(media_col->values[0].collection, "media-size", IPP_TAG_BEGIN_COLLECTION)) == NULL) { if ((media_size = ippFindAttribute(media_col->values[0].collection, "media-col", IPP_TAG_ZERO)) == NULL) puts("FAIL (not found)"); else printf("FAIL (wrong type - %s)\n", ippTagString(media_size->value_tag)); status = 1; } else { if ((attr = ippFindAttribute(media_size->values[0].collection, "x-dimension", IPP_TAG_INTEGER)) == NULL) { if ((attr = ippFindAttribute(media_size->values[0].collection, "x-dimension", IPP_TAG_ZERO)) == NULL) puts("FAIL (missing x-dimension)"); else printf("FAIL (wrong type for x-dimension - %s)\n", ippTagString(attr->value_tag)); status = 1; } else if (attr->values[0].integer != 21590) { printf("FAIL (wrong value for x-dimension - %d)\n", attr->values[0].integer); status = 1; } else if ((attr = ippFindAttribute(media_size->values[0].collection, "y-dimension", IPP_TAG_INTEGER)) == NULL) { if ((attr = ippFindAttribute(media_size->values[0].collection, "y-dimension", IPP_TAG_ZERO)) == NULL) puts("FAIL (missing y-dimension)"); else printf("FAIL (wrong type for y-dimension - %s)\n", ippTagString(attr->value_tag)); status = 1; } else if (attr->values[0].integer != 27940) { printf("FAIL (wrong value for y-dimension - %d)\n", attr->values[0].integer); status = 1; } else puts("PASS"); } fputs("ippFindAttribute(media-size 2): ", stdout); if ((media_size = ippFindAttribute(media_col->values[1].collection, "media-size", IPP_TAG_BEGIN_COLLECTION)) == NULL) { if ((media_size = ippFindAttribute(media_col->values[1].collection, "media-col", IPP_TAG_ZERO)) == NULL) puts("FAIL (not found)"); else printf("FAIL (wrong type - %s)\n", ippTagString(media_size->value_tag)); status = 1; } else { if ((attr = ippFindAttribute(media_size->values[0].collection, "x-dimension", IPP_TAG_INTEGER)) == NULL) { if ((attr = ippFindAttribute(media_size->values[0].collection, "x-dimension", IPP_TAG_ZERO)) == NULL) puts("FAIL (missing x-dimension)"); else printf("FAIL (wrong type for x-dimension - %s)\n", ippTagString(attr->value_tag)); status = 1; } else if (attr->values[0].integer != 21000) { printf("FAIL (wrong value for x-dimension - %d)\n", attr->values[0].integer); status = 1; } else if ((attr = ippFindAttribute(media_size->values[0].collection, "y-dimension", IPP_TAG_INTEGER)) == NULL) { if ((attr = ippFindAttribute(media_size->values[0].collection, "y-dimension", IPP_TAG_ZERO)) == NULL) puts("FAIL (missing y-dimension)"); else printf("FAIL (wrong type for y-dimension - %s)\n", ippTagString(attr->value_tag)); status = 1; } else if (attr->values[0].integer != 29700) { printf("FAIL (wrong value for y-dimension - %d)\n", attr->values[0].integer); status = 1; } else puts("PASS"); } } /* * Test hierarchical find... */ fputs("ippFindAttribute(media-col/media-size/x-dimension): ", stdout); if ((attr = ippFindAttribute(request, "media-col/media-size/x-dimension", IPP_TAG_INTEGER)) != NULL) { if (ippGetInteger(attr, 0) != 21590) { printf("FAIL (wrong value for x-dimension - %d)\n", ippGetInteger(attr, 0)); status = 1; } else puts("PASS"); } else { puts("FAIL (not found)"); status = 1; } fputs("ippFindNextAttribute(media-col/media-size/x-dimension): ", stdout); if ((attr = ippFindNextAttribute(request, "media-col/media-size/x-dimension", IPP_TAG_INTEGER)) != NULL) { if (ippGetInteger(attr, 0) != 21000) { printf("FAIL (wrong value for x-dimension - %d)\n", ippGetInteger(attr, 0)); status = 1; } else puts("PASS"); } else { puts("FAIL (not found)"); status = 1; } fputs("ippFindNextAttribute(media-col/media-size/x-dimension) again: ", stdout); if ((attr = ippFindNextAttribute(request, "media-col/media-size/x-dimension", IPP_TAG_INTEGER)) != NULL) { printf("FAIL (got %d, expected nothing)\n", ippGetInteger(attr, 0)); status = 1; } else puts("PASS"); ippDelete(request); /* * Read the mixed data and confirm we converted everything to rangeOfInteger * values... */ printf("Read Mixed integer/rangeOfInteger from Memory: "); request = ippNew(); data.rpos = 0; data.wused = sizeof(mixed); data.wsize = sizeof(mixed); data.wbuffer = mixed; while ((state = ippReadIO(&data, (ipp_iocb_t)read_cb, 1, NULL, request)) != IPP_STATE_DATA) if (state == IPP_STATE_ERROR) break; length = ippLength(request); if (state != IPP_STATE_DATA) { printf("FAIL - %d bytes read.\n", (int)data.rpos); status = 1; } else if (data.rpos != sizeof(mixed)) { printf("FAIL - read %d bytes, expected %d bytes!\n", (int)data.rpos, (int)sizeof(mixed)); print_attributes(request, 8); status = 1; } else if (length != (sizeof(mixed) + 4)) { printf("FAIL - wrong ippLength(), %d instead of %d bytes!\n", (int)length, (int)sizeof(mixed) + 4); print_attributes(request, 8); status = 1; } else puts("PASS"); fputs("ippFindAttribute(notify-lease-duration-supported): ", stdout); if ((attr = ippFindAttribute(request, "notify-lease-duration-supported", IPP_TAG_ZERO)) == NULL) { puts("FAIL (not found)"); status = 1; } else if (attr->value_tag != IPP_TAG_RANGE) { printf("FAIL (wrong type - %s)\n", ippTagString(attr->value_tag)); status = 1; } else if (attr->num_values != 2) { printf("FAIL (wrong count - %d)\n", attr->num_values); status = 1; } else if (attr->values[0].range.lower != 1 || attr->values[0].range.upper != 1 || attr->values[1].range.lower != 16 || attr->values[1].range.upper != 32) { printf("FAIL (wrong values - %d,%d and %d,%d)\n", attr->values[0].range.lower, attr->values[0].range.upper, attr->values[1].range.lower, attr->values[1].range.upper); status = 1; } else puts("PASS"); ippDelete(request); #ifdef DEBUG /* * Test that private option array is sorted... */ fputs("_ippCheckOptions: ", stdout); if ((name = _ippCheckOptions()) == NULL) puts("PASS"); else { printf("FAIL (\"%s\" out of order)\n", name); status = 1; } #endif /* DEBUG */ /* * Test _ippFindOption() private API... */ fputs("_ippFindOption(\"printer-type\"): ", stdout); if (_ippFindOption("printer-type")) puts("PASS"); else { puts("FAIL"); status = 1; } /* * Summarize... */ putchar('\n'); if (status) puts("Core IPP tests failed."); else puts("Core IPP tests passed."); } else { /* * Read IPP files... */ for (i = 1; i < (size_t)argc; i ++) { if ((fp = cupsFileOpen(argv[i], "r")) == NULL) { printf("Unable to open \"%s\" - %s\n", argv[i], strerror(errno)); status = 1; continue; } request = ippNew(); while ((state = ippReadIO(fp, (ipp_iocb_t)cupsFileRead, 1, NULL, request)) == IPP_STATE_ATTRIBUTE); if (state != IPP_STATE_DATA) { printf("Error reading IPP message from \"%s\"!\n", argv[i]); status = 1; } else { printf("\n%s:\n", argv[i]); print_attributes(request, 4); } ippDelete(request); cupsFileClose(fp); } } return (status); } /* * 'hex_dump()' - Produce a hex dump of a buffer. */ void hex_dump(const char *title, /* I - Title */ ipp_uchar_t *buffer, /* I - Buffer to dump */ size_t bytes) /* I - Number of bytes */ { size_t i, j; /* Looping vars */ int ch; /* Current ASCII char */ /* * Show lines of 16 bytes at a time... */ printf(" %s:\n", title); for (i = 0; i < bytes; i += 16) { /* * Show the offset... */ printf(" %04x ", (unsigned)i); /* * Then up to 16 bytes in hex... */ for (j = 0; j < 16; j ++) if ((i + j) < bytes) printf(" %02x", buffer[i + j]); else printf(" "); /* * Then the ASCII representation of the bytes... */ putchar(' '); putchar(' '); for (j = 0; j < 16 && (i + j) < bytes; j ++) { ch = buffer[i + j] & 127; if (ch < ' ' || ch == 127) putchar('.'); else putchar(ch); } putchar('\n'); } } /* * 'print_attributes()' - Print the attributes in a request... */ void print_attributes(ipp_t *ipp, /* I - IPP request */ int indent) /* I - Indentation */ { ipp_tag_t group; /* Current group */ ipp_attribute_t *attr; /* Current attribute */ char buffer[2048]; /* Value string */ for (group = IPP_TAG_ZERO, attr = ipp->attrs; attr; attr = attr->next) { if (!attr->name && indent == 4) { group = IPP_TAG_ZERO; putchar('\n'); continue; } if (group != attr->group_tag) { group = attr->group_tag; printf("\n%*s%s:\n\n", indent - 4, "", ippTagString(group)); } ippAttributeString(attr, buffer, sizeof(buffer)); printf("%*s%s (%s%s): %s\n", indent, "", attr->name ? attr->name : "(null)", attr->num_values > 1 ? "1setOf " : "", ippTagString(attr->value_tag), buffer); } } /* * 'read_cb()' - Read data from a buffer. */ ssize_t /* O - Number of bytes read */ read_cb(_ippdata_t *data, /* I - Data */ ipp_uchar_t *buffer, /* O - Buffer to read */ size_t bytes) /* I - Number of bytes to read */ { size_t count; /* Number of bytes */ /* * Copy bytes from the data buffer to the read buffer... */ if ((count = data->wsize - data->rpos) > bytes) count = bytes; memcpy(buffer, data->wbuffer + data->rpos, count); data->rpos += count; /* * Return the number of bytes read... */ return ((ssize_t)count); } /* * 'write_cb()' - Write data into a buffer. */ ssize_t /* O - Number of bytes written */ write_cb(_ippdata_t *data, /* I - Data */ ipp_uchar_t *buffer, /* I - Buffer to write */ size_t bytes) /* I - Number of bytes to write */ { size_t count; /* Number of bytes */ /* * Loop until all bytes are written... */ if ((count = data->wsize - data->wused) > bytes) count = bytes; memcpy(data->wbuffer + data->wused, buffer, count); data->wused += count; /* * Return the number of bytes written... */ return ((ssize_t)count); }