| 1 | /* |
| 2 | * Printing interface for PuTTY. |
| 3 | */ |
| 4 | |
| 5 | #include <windows.h> |
| 6 | #include "putty.h" |
| 7 | |
| 8 | /* |
| 9 | * Boggle. Flipping between the two branches of this #if appears to |
| 10 | * make all the difference as to whether network printers show up |
| 11 | * under PRINTER_ENUM_CONNECTIONS on NT 4. I don't pretend to |
| 12 | * understand this... |
| 13 | */ |
| 14 | #if 0 |
| 15 | #define ENUM_LEVEL 5 |
| 16 | #define ENUM_PTR LPPRINTER_INFO_5 |
| 17 | #define ENUM_TYPE PRINTER_INFO_5 |
| 18 | #define ENUM_MEMBER pPrinterName |
| 19 | #else |
| 20 | #define ENUM_LEVEL 1 |
| 21 | #define ENUM_PTR LPPRINTER_INFO_1 |
| 22 | #define ENUM_TYPE PRINTER_INFO_1 |
| 23 | #define ENUM_MEMBER pName |
| 24 | #endif |
| 25 | |
| 26 | struct printer_enum_tag { |
| 27 | int nprinters; |
| 28 | ENUM_PTR info; |
| 29 | }; |
| 30 | |
| 31 | struct printer_job_tag { |
| 32 | HANDLE hprinter; |
| 33 | }; |
| 34 | |
| 35 | static char *printer_add_enum(int param, char *buffer, |
| 36 | int offset, int *nprinters_ptr) |
| 37 | { |
| 38 | DWORD needed, nprinters; |
| 39 | |
| 40 | buffer = srealloc(buffer, offset+512); |
| 41 | |
| 42 | /* |
| 43 | * Exploratory call to EnumPrinters to determine how much space |
| 44 | * we'll need for the output. Discard the return value since it |
| 45 | * will almost certainly be a failure due to lack of space. |
| 46 | */ |
| 47 | EnumPrinters(param, NULL, ENUM_LEVEL, buffer+offset, 512, |
| 48 | &needed, &nprinters); |
| 49 | |
| 50 | if (needed < 512) |
| 51 | needed = 512; |
| 52 | |
| 53 | buffer = srealloc(buffer, offset+needed); |
| 54 | |
| 55 | if (EnumPrinters(param, NULL, ENUM_LEVEL, buffer+offset, |
| 56 | needed, &needed, &nprinters) == 0) |
| 57 | return NULL; |
| 58 | |
| 59 | *nprinters_ptr += nprinters; |
| 60 | |
| 61 | return buffer; |
| 62 | } |
| 63 | |
| 64 | printer_enum *printer_start_enum(int *nprinters_ptr) |
| 65 | { |
| 66 | printer_enum *ret = smalloc(sizeof(printer_enum)); |
| 67 | char *buffer = NULL, *retval; |
| 68 | |
| 69 | *nprinters_ptr = 0; /* default return value */ |
| 70 | buffer = smalloc(512); |
| 71 | |
| 72 | retval = printer_add_enum(PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS, |
| 73 | buffer, 0, nprinters_ptr); |
| 74 | if (!retval) |
| 75 | goto error; |
| 76 | else |
| 77 | buffer = retval; |
| 78 | |
| 79 | ret->info = (ENUM_PTR)buffer; |
| 80 | ret->nprinters = *nprinters_ptr; |
| 81 | |
| 82 | return ret; |
| 83 | |
| 84 | error: |
| 85 | sfree(buffer); |
| 86 | sfree(ret); |
| 87 | *nprinters_ptr = 0; |
| 88 | return NULL; |
| 89 | } |
| 90 | |
| 91 | char *printer_get_name(printer_enum *pe, int i) |
| 92 | { |
| 93 | if (!pe) |
| 94 | return NULL; |
| 95 | if (i < 0 || i >= pe->nprinters) |
| 96 | return NULL; |
| 97 | return pe->info[i].ENUM_MEMBER; |
| 98 | } |
| 99 | |
| 100 | void printer_finish_enum(printer_enum *pe) |
| 101 | { |
| 102 | if (!pe) |
| 103 | return; |
| 104 | sfree(pe->info); |
| 105 | sfree(pe); |
| 106 | } |
| 107 | |
| 108 | printer_job *printer_start_job(char *printer) |
| 109 | { |
| 110 | printer_job *ret = smalloc(sizeof(printer_job)); |
| 111 | DOC_INFO_1 docinfo; |
| 112 | int jobstarted = 0, pagestarted = 0; |
| 113 | |
| 114 | ret->hprinter = NULL; |
| 115 | if (!OpenPrinter(printer, &ret->hprinter, NULL)) |
| 116 | goto error; |
| 117 | |
| 118 | docinfo.pDocName = "PuTTY remote printer output"; |
| 119 | docinfo.pOutputFile = NULL; |
| 120 | docinfo.pDatatype = "RAW"; |
| 121 | |
| 122 | if (!StartDocPrinter(ret->hprinter, 1, (LPSTR)&docinfo)) |
| 123 | goto error; |
| 124 | jobstarted = 1; |
| 125 | |
| 126 | if (!StartPagePrinter(ret->hprinter)) |
| 127 | goto error; |
| 128 | pagestarted = 1; |
| 129 | |
| 130 | return ret; |
| 131 | |
| 132 | error: |
| 133 | if (pagestarted) |
| 134 | EndPagePrinter(ret->hprinter); |
| 135 | if (jobstarted) |
| 136 | EndDocPrinter(ret->hprinter); |
| 137 | if (ret->hprinter) |
| 138 | ClosePrinter(ret->hprinter); |
| 139 | sfree(ret); |
| 140 | return NULL; |
| 141 | } |
| 142 | |
| 143 | void printer_job_data(printer_job *pj, void *data, int len) |
| 144 | { |
| 145 | DWORD written; |
| 146 | |
| 147 | if (!pj) |
| 148 | return; |
| 149 | |
| 150 | WritePrinter(pj->hprinter, data, len, &written); |
| 151 | } |
| 152 | |
| 153 | void printer_finish_job(printer_job *pj) |
| 154 | { |
| 155 | if (!pj) |
| 156 | return; |
| 157 | |
| 158 | EndPagePrinter(pj->hprinter); |
| 159 | EndDocPrinter(pj->hprinter); |
| 160 | ClosePrinter(pj->hprinter); |
| 161 | sfree(pj); |
| 162 | } |