| 1 | /* |
| 2 | * Printing interface for PuTTY. |
| 3 | */ |
| 4 | |
| 5 | #include "putty.h" |
| 6 | #include <winspool.h> |
| 7 | |
| 8 | struct printer_enum_tag { |
| 9 | int nprinters; |
| 10 | DWORD enum_level; |
| 11 | union { |
| 12 | LPPRINTER_INFO_4 i4; |
| 13 | LPPRINTER_INFO_5 i5; |
| 14 | } info; |
| 15 | }; |
| 16 | |
| 17 | struct printer_job_tag { |
| 18 | HANDLE hprinter; |
| 19 | }; |
| 20 | |
| 21 | static char *printer_add_enum(int param, DWORD level, char *buffer, |
| 22 | int offset, int *nprinters_ptr) |
| 23 | { |
| 24 | DWORD needed, nprinters; |
| 25 | |
| 26 | buffer = sresize(buffer, offset+512, char); |
| 27 | |
| 28 | /* |
| 29 | * Exploratory call to EnumPrinters to determine how much space |
| 30 | * we'll need for the output. Discard the return value since it |
| 31 | * will almost certainly be a failure due to lack of space. |
| 32 | */ |
| 33 | EnumPrinters(param, NULL, level, buffer+offset, 512, |
| 34 | &needed, &nprinters); |
| 35 | |
| 36 | if (needed < 512) |
| 37 | needed = 512; |
| 38 | |
| 39 | buffer = sresize(buffer, offset+needed, char); |
| 40 | |
| 41 | if (EnumPrinters(param, NULL, level, buffer+offset, |
| 42 | needed, &needed, &nprinters) == 0) |
| 43 | return NULL; |
| 44 | |
| 45 | *nprinters_ptr += nprinters; |
| 46 | |
| 47 | return buffer; |
| 48 | } |
| 49 | |
| 50 | printer_enum *printer_start_enum(int *nprinters_ptr) |
| 51 | { |
| 52 | printer_enum *ret = snew(printer_enum); |
| 53 | char *buffer = NULL, *retval; |
| 54 | |
| 55 | *nprinters_ptr = 0; /* default return value */ |
| 56 | buffer = snewn(512, char); |
| 57 | |
| 58 | /* |
| 59 | * Determine what enumeration level to use. |
| 60 | * When enumerating printers, we need to use PRINTER_INFO_4 on |
| 61 | * NT-class systems to avoid Windows looking too hard for them and |
| 62 | * slowing things down; and we need to avoid PRINTER_INFO_5 as |
| 63 | * we've seen network printers not show up. |
| 64 | * On 9x-class systems, PRINTER_INFO_4 isn't available and |
| 65 | * PRINTER_INFO_5 is recommended. |
| 66 | * Bletch. |
| 67 | */ |
| 68 | if (osVersion.dwPlatformId != VER_PLATFORM_WIN32_NT) { |
| 69 | ret->enum_level = 5; |
| 70 | } else { |
| 71 | ret->enum_level = 4; |
| 72 | } |
| 73 | |
| 74 | retval = printer_add_enum(PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS, |
| 75 | ret->enum_level, buffer, 0, nprinters_ptr); |
| 76 | if (!retval) |
| 77 | goto error; |
| 78 | else |
| 79 | buffer = retval; |
| 80 | |
| 81 | switch (ret->enum_level) { |
| 82 | case 4: |
| 83 | ret->info.i4 = (LPPRINTER_INFO_4)buffer; |
| 84 | break; |
| 85 | case 5: |
| 86 | ret->info.i5 = (LPPRINTER_INFO_5)buffer; |
| 87 | break; |
| 88 | } |
| 89 | ret->nprinters = *nprinters_ptr; |
| 90 | |
| 91 | return ret; |
| 92 | |
| 93 | error: |
| 94 | sfree(buffer); |
| 95 | sfree(ret); |
| 96 | *nprinters_ptr = 0; |
| 97 | return NULL; |
| 98 | } |
| 99 | |
| 100 | char *printer_get_name(printer_enum *pe, int i) |
| 101 | { |
| 102 | if (!pe) |
| 103 | return NULL; |
| 104 | if (i < 0 || i >= pe->nprinters) |
| 105 | return NULL; |
| 106 | switch (pe->enum_level) { |
| 107 | case 4: |
| 108 | return pe->info.i4[i].pPrinterName; |
| 109 | case 5: |
| 110 | return pe->info.i5[i].pPrinterName; |
| 111 | default: |
| 112 | return NULL; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | void printer_finish_enum(printer_enum *pe) |
| 117 | { |
| 118 | if (!pe) |
| 119 | return; |
| 120 | switch (pe->enum_level) { |
| 121 | case 4: |
| 122 | sfree(pe->info.i4); |
| 123 | break; |
| 124 | case 5: |
| 125 | sfree(pe->info.i5); |
| 126 | break; |
| 127 | } |
| 128 | sfree(pe); |
| 129 | } |
| 130 | |
| 131 | printer_job *printer_start_job(char *printer) |
| 132 | { |
| 133 | printer_job *ret = snew(printer_job); |
| 134 | DOC_INFO_1 docinfo; |
| 135 | int jobstarted = 0, pagestarted = 0; |
| 136 | |
| 137 | ret->hprinter = NULL; |
| 138 | if (!OpenPrinter(printer, &ret->hprinter, NULL)) |
| 139 | goto error; |
| 140 | |
| 141 | docinfo.pDocName = "PuTTY remote printer output"; |
| 142 | docinfo.pOutputFile = NULL; |
| 143 | docinfo.pDatatype = "RAW"; |
| 144 | |
| 145 | if (!StartDocPrinter(ret->hprinter, 1, (LPSTR)&docinfo)) |
| 146 | goto error; |
| 147 | jobstarted = 1; |
| 148 | |
| 149 | if (!StartPagePrinter(ret->hprinter)) |
| 150 | goto error; |
| 151 | pagestarted = 1; |
| 152 | |
| 153 | return ret; |
| 154 | |
| 155 | error: |
| 156 | if (pagestarted) |
| 157 | EndPagePrinter(ret->hprinter); |
| 158 | if (jobstarted) |
| 159 | EndDocPrinter(ret->hprinter); |
| 160 | if (ret->hprinter) |
| 161 | ClosePrinter(ret->hprinter); |
| 162 | sfree(ret); |
| 163 | return NULL; |
| 164 | } |
| 165 | |
| 166 | void printer_job_data(printer_job *pj, void *data, int len) |
| 167 | { |
| 168 | DWORD written; |
| 169 | |
| 170 | if (!pj) |
| 171 | return; |
| 172 | |
| 173 | WritePrinter(pj->hprinter, data, len, &written); |
| 174 | } |
| 175 | |
| 176 | void printer_finish_job(printer_job *pj) |
| 177 | { |
| 178 | if (!pj) |
| 179 | return; |
| 180 | |
| 181 | EndPagePrinter(pj->hprinter); |
| 182 | EndDocPrinter(pj->hprinter); |
| 183 | ClosePrinter(pj->hprinter); |
| 184 | sfree(pj); |
| 185 | } |